ANNEX I

Definitions applicable for Annexes II to VII

1.GENERIC DEFINITIONS

(1)‘declared values’ means the stated, calculated or measured values provided in the technical documentation by the manufacturer, importer or authorised representative;

(2)‘equivalent model’ means a model placed on the market with the same technical parameters set out in Annex II, as another model placed on the market or put into service by the same manufacturer;

(3)‘model identifier’ means the code, usually alphanumeric, which distinguishes a model from other models with the same brand or trade mark in the product database set under Regulation (EU) 2017/1369 ( 1 );

2.DEFINITIONS RELATED TO HEATERS

(4)‘conversion coefficient’ (CC) means the default coefficient referred to in Article 31(3) of Directive (EU) 2023/1791 of the European Parliament and of the Council ( 2 ) in the version in force on 10 October 2023;

(5)‘standby mode’ means a condition where the heater is connected to the mains power source and provides only the following functions, which may persist for an indefinite time:

(a)reactivation function, or reactivation function and only an indication of enabled reactivation function; 

(b)reactivation function through a connection to a network (‘network standby’);

(c)information or status display;

(6)‘active mode’ means a condition corresponding to the hours with a heating or cooling load for the enclosed space and activated heating or cooling function; for heat-pump heater, this condition may involve cycling of the heat-pump heater to reach or maintain a required indoor air temperature;

(7)‘network’ means a communication infrastructure as intended under Commission Regulation (EU) 2023/826 ( 3 ), Article 2 point (9);

(8)‘reactivation function’ means a function that via a remote switch, a remote control, an internal sensor or timer provides a switch from standby mode to another mode, including active mode, providing additional functions;

(9)‘standby mode power consumption’ (PSB) means the electric power consumption of a heater in standby mode, including network standby, expressed in kW;

(10)‘climate conditions’ means solar radiations during the heating season, or the temperature conditions during the heating season or during the cooling season, as expressed by the frequency, in hours, of the outdoor temperature bin values, rounded to the nearest integer, as provided for in Annex III Table 4;

(11)‘average climate conditions’ in heating mode’ means the climate conditions characteristic for the city of Strasbourg; 

(12)‘colder climate conditions in heating mode’ means the climate conditions characteristic for the city of Helsinki; 

(13)‘warmer climate conditions’ in heating mode’ means the climate conditions characteristic for the cities of Athens;

(14)‘average climate conditions’ in cooling mode means a weighted average distribution based on several European capital cities;

(15)‘gross calorific value’ (GCV) means the total amount of heat released by a unit quantity of fuel when it is burned completely with oxygen and when the products of combustion are returned to ambient temperature; this quantity includes the condensation heat of any water vapour contained in the fuel and of the water vapour formed by the combustion of any hydrogen contained in the fuel;

(16)‘control correction factor’ (F(1)) means a correction factor for a basic temperature control, subtracting 3 percentage points from the seasonal space-heating energy-efficiency;

(17)‘auxiliary electricity correction factor’ (F(2)) means the factor equal to the electric auxiliary consumption of the heater as a fraction of the total annual energy consumption of the heater, expressed in percentage points;

(18)‘auxiliary electricity consumption’ means the annual amount of electricity consumed by the heater components such as the fan, the valves, and the heating elements required for the heat generator designated operation, but not the circulation pump, expressed in kWh/a;

(19)‘seasonal space heating energy efficiency’ (ηs,h) means the ratio between the space-heating demand supplied by a heater and the annual energy consumption required to meet this demand, expressed in %;

(20)‘seasonal space heating energy efficiency in active mode’ (ηson) means the seasonal space-heating energy-efficiency during the hours with a space-heating load, whereby the heating function of the heater is activated, possibly involving on/off cycling of the heater to reach or maintain a required instantaneous heat load;

(21)‘heat output’ (P) means the heat produced by a heater which is transmitted to the water-based heat distribution system, expressed in kW;

(22)‘water-based heat distribution system’ means a system using water as a heat-transfer medium to distribute generated heat to heat emitters for the space heating of buildings, or parts thereof;

(23)‘building automation and control system’ means a building automation and control system as defined in Article 2, point (7), of Directive (EU) 2024/1275 ( 4 );

(24)‘spare part’ means a separate part that can replace a part with the same or similar function in a product;

(25)‘proprietary tool’ means a tool that is not available for purchase by the general public or for which any applicable patents are not available to licence under fair, reasonable and non-discriminatory terms

(26)‘energy smart appliance’ means a product whose supplier is a signatory of the Code of Conduct on energy management related interoperability of energy smart appliances, and which is compliant with this Code of Conduct;

(27)‘global warming potential’ (GWP) means the ratio characterizing the relative climate radiative forcing impact of a refrigerant fluid over a reference period in relation to the climate radiative forcing impact of CO2, as intended in Regulation (EU) No 2024/573 ( 5 ) of the European Parliament and of the Council, in Article 3 point (1);

(28)‘fluorinated green-house gases’ means the fluorinated green-house gases in scope of Regulation (EU) 2024/573 of the European Parliament and of the Council ( 6 );

3.DEFINITIONS RELATED TO FUEL AND ELECTRIC BOILER HEATERS, AND COGENERATION HEATERS

(29)‘B1 boiler heater’ means a fuel boiler heater incorporating a draught diverter, intended to be connected to a natural draught flue that evacuates the residues of combustion to the outside of the room containing the fuel boiler heater, and drawing the combustion air directly from the room;

(30)‘condensing boiler heater’ means a fuel boiler heater in which, under normal operating conditions and at given operating water temperatures, the water vapour in the combustion products is partially condensed, in order to make use of the latent heat of this water vapour for heating purposes;

(31)‘space-heating efficiency’ (η) means:

(a)for fuel boiler heaters: the ratio of the heat output in kW and the heat input in kW in terms of the GCV of the fuel;

(b)for cogeneration heaters: the ratio between the sum of the heat output and of the electric output multiplied by the electricity conversion factor of 2.65 in kW, and the heat input in kW in terms of the GCV of the fuel;

(c)for electric boilers: the ratio of the heat output in kW and the electric input in kW;

(32)‘standard rated heat input’ (Phs) of a fuel boiler heater or cogeneration heater means the heat input consumed when the heater is providing its maximum heat output in a 60/80 temperature regime, in kW, in terms of GCV;

(33)‘standard rated electric power input’ (EC) of an electric boiler heater is the electric power consumed at standard-rated heat output;

(34)‘standard rated heat output’ (P4) of a fuel boiler heater, electric boiler heater, or cogeneration heater means the maximal heat output in a 60/80 temperature regime, expressed in kW;

(35)‘part-load output’ (P1) of a fuel boiler heater means the heat output at 30 % of the standard-rated heat input Phs in a 30/50 temperature regime, expressed in kW;

(36)‘30/50 temperature regime’ means the 30 °C inlet and 50 °C outlet temperature for water;

(37)‘minimum part-load output’ (P0) of a fuel boiler heater means the heat output with the lowest thermal input declared by the manufacturer that can be achieved without on/off cycling in a 30/50 temperature regime, expressed in kW;

(38)‘turndown ratio’ of a fuel boiler means the ratio between the lowest thermal input declared by the supplier that can be achieved without on/off cycling in a 30/50 temperature regime and Phs, expressed in %;

(39)‘nominal efficiency’ (η4) of a fuel boiler heater, electric boiler heater or cogeneration heater means the efficiency at standard-rated heat output;

(40)‘efficiency at 30 % input’ (η1) means, for a fuel boiler heater, the space-heating efficiency at 30 % of the standard-rated heat input Phs;

(41)‘efficiency at minimum heat input’ (η0) of a fuel boiler heater means the ratio between minimum part-load output (P0) and standard-rated heat input (Phs);

(42)‘full load auxiliary power’ (elmax) means the electric power consumption, as part of the electric auxiliary energy, at standard-rated heat output P4 of a fuel boiler heater or cogeneration heater, expressed in kW;

(43)‘part load auxiliary power’ (elmin) means the electric power consumption, as part of the electric auxiliary energy, at part load P1 of a fuel boiler heater or cogeneration heater, expressed in kW;

(44)‘standby heat loss’ (Ph,l) means the heat loss of a boiler heater in operating modes without heat demand, expressed in kW;

(45)‘standby heat loss correction factor’ (F(3)) means a correction factor for the standby heat loss of boiler heaters and cogeneration heaters;

(46)‘cogeneration electric power output’ (Pel) is the electric power output of a cogeneration heater operating at standard-rated heat output, expressed in kW;

(47)‘cogeneration part efficiency’ ( is the efficiency of the cogeneration heater when only the cogeneration heat generator is supplying heat, in a 30/50 temperature regime;

(48)‘cogeneration part heat output’ (PCHP) is the heat output of the cogeneration, when only the cogeneration heat generator is supplying heat, in a 30/50 temperature regime, expressed in kW;

(49)‘cogeneration part electric power output’ (Pel_CHP) is the rated electric power output, when only the cogeneration heat generator is supplying heat, in a 30/50 temperature regime, expressed in kW;

(50)‘cogeneration part heat input’ (Pinput_CHP) is the heat-input power in GCV of the liquid-fuel or gaseous-fuel input of the cogeneration, when only the cogeneration heat generator is supplying heat, in a 30/50 temperature regime, expressed in kW;

4.DEFINITIONS RELATED TO HEAT-PUMP HEATERS AND HYBRID HEAT-PUMP HEATERS

(51)‘reference design conditions’ means average climate conditions, for medium-temperature applications for MT and HT heat-pump heaters and for hybrid heat-pump heaters, and low-temperature applications for LT heat-pump heaters, in kW;

(52)‘standard rating conditions’ means the operating conditions of heaters under which they are tested to determine their standard-rated heat output, seasonal space-heating energy efficiency, water-heating energy efficiency, standard-rated cooling capacity, seasonal space-cooling energy efficiency, sound-power level and nitrogen oxide emissions;

(53)‘operation limit temperature’ (TOL) means the outdoor temperature below which the declared electric heat-pump heater capacity or the capacity of the electric heat-pump heat generator of the heat-pump or of the hybrid heat-pump heater is equal to zero, expressed in degrees Celsius, rounded up to the nearest higher integer value;

(54)‘reference design temperature’ means the outdoor temperature for either cooling (Tdesign,c) or heating (Tdesign,h) as described in Annex III, Table 11, at which the ‘part-load ratio’ is equal to 1 and which varies according to the cooling or heating season, expressed in degrees Celsius;

(55)‘LT heat-pump heater’ means a heat-pump heater declared to be capable of being used in a low-temperature application, but not in a medium-temperature nor in a high-temperature application;

(56)‘MT heat-pump heater’ means a heat-pump heater declared to be capable of being used in a medium-temperature application but not in a high-temperature application;

(57)‘HT heat-pump heater’ means a heat-pump heater declared to be capable of being used in a high-temperature application;

(58)‘low temperature heating application’ means an application where the heat-pump heater delivers heating at an indoor heat exchanger outlet temperature of 35 °C at design temperature, and at a specific water outlet temperature per part-load condition;

(59)‘medium-temperature heating application’ means an application where the heat-pump heater delivers heating at an indoor heat exchanger outlet temperature of 55 °C at design temperature, and at a specific water outlet temperature per part-load condition;

(60)‘high temperature heating application’ means an application where the heat-pump heater delivers heating at an indoor heat exchanger outlet temperature of 65 °C at design temperature, and at a specific water outlet temperature per part-load condition;

(61)‘heat-pump heat source’ designates the type of heat source or heat exchanger used at the evaporator side of a heat-pump heater or hybrid heat-pump heater: outdoor air, ventilation exhaust air (abbreviated as ‘exhaust air’), ground heat exchanger (brine or water), or ground direct exchange (refrigerant);

(62)‘design load’ of a heat-pump heater or hybrid heat-pump heater (Pdesign,h) means the heat load at reference design conditions, expressed in kW;

(63)‘reference design conditions’ means the combination given in Annex III, Table 1, of:

(a)for heat-pump heaters in heating mode, the reference design temperature, the maximum bivalent temperature, maximum operation limit temperature, and if the heat-pump heater uses exhaust air, the maximum availability of exhaust air volume rates at Pdesign,h,

(b)for hybrid heat-pump heaters in heating mode, the reference design temperature, and if the heat-pump heater uses exhaust air, the maximum availability of exhaust air volume rates at Pdesign,h;

(c)for cooling, the reference design temperature;

(64)‘reference design temperature’ means the outdoor temperature for either cooling (Tdesign,c) or heating (Tdesign,h) as described in Annex III, Table 1, at which the ‘part-load ratio’ is equal to 1 and which varies according to the cooling or heating season, expressed in degrees Celsius;

(65)‘bivalent temperature’ (Tbiv) means the lowest outdoor temperature point at which the heat-pump heater is declared to have a capacity able to meet 100% of the heating load, expressed in degrees Celsius, rounded up to the nearest integer value;

(66)‘reference annual heating demand’ (QH) means the reference heating demand for the heating season in a specific climate, to be used as the basis for calculating SCOP or SPER and calculated as the product of the design load for heating and the annual equivalent active-mode hours, expressed in kWh/a;

(67)‘annual equivalent active mode hours’ (HHE) means the assumed annual number of hours in a specific climate a heat-pump heater or hybrid heat-pump heater has to provide the design load for heating to satisfy the reference annual heating demand, expressed in hours, as set out in Annex III, Table 2;

(68)‘annual energy consumption’ (QHE) means the energy consumption required to meet the reference annual heating demand for a designated heating season, expressed in kWh in terms of GCV and/or in kWh in terms of the final electricity consumption multiplied by CC;

(69)‘heating season’ means a set of operating conditions describing per bin the combination of outdoor temperatures and the number of hours these temperatures occur per season;

(70)‘bin’ (bin j) means a combination of an outdoor temperature and a number of hours;

(71)‘outdoor temperature’ (Tj) means the dry-bulb outdoor air temperature for bin j, expressed in degrees Celsius; the relative humidity may be indicated by a corresponding wet bulb temperature;

(72)‘part-load ratio’ (pl(Tj)) means the outdoor temperature Tj minus 16 °C divided by the reference design temperature Tdesign,h minus 16 °C;

(73)‘bin hours’ (Hj) means the hours per heating or cooling season, expressed in hours per year, at which an outdoor temperature occurs for each bin;

(74)‘part-load for heating’ (Ph(Tj)) means the heating load at a specific outdoor temperature, calculated as the design load multiplied by the part-load ratio, expressed in kW;

(75)‘part-load conditions’ is the set of temperature conditions for testing at part-loads A, B, C, D, E and F;

(76)‘Single speed heat-pump’ means a heat-pump for which the heat output (resp. cooling capacity) can only adapt to the heating (resp. cooling) needs by cycling the compressor on and off.

(77)‘minimum capacity for heating in continuous operation’ (Pdh(Tj)) means the declared heating capacity a heat-pump heater is able to deliver, for an outdoor temperature Tj, expressed in kW;

(78)‘backup capacity’ (Padd(Tj)) is the difference between the part-load for heating and the maximum heat output of the main generator, for an outdoor temperature Tj, expressed in kW;

(79)‘backup energy input’ (INPUTadd(Tj)) is the energy input of the backup heater, for an outdoor temperature Tj, expressed in kW;

(80)‘declared coefficient of performance’ (COPd(Tj)) means the declared coefficient of performance at the designated bins at Tj of the part-load conditions;

(81)‘fuel utilisation efficiency’ (FUEd(Tj)) is the declared ratio between the part-load Ph(Tj) and the measured thermal input in terms of GCV at a specific outdoor temperature Tj, expressed in kW/kW;

(82)‘auxiliary electricity factor’ (AEF(Tj)) is the ratio between the part-load Ph(Tj) and the electric power input at a specific outdoor temperature Tj, expressed in kW/kW;

(83)‘capacity ratio’ (CR) is the part-load for heating Ph(Tj) divided by the declared heating capacity Pdh(Tj) of the heater at the same temperature Tj condition;

(84)‘cycling’ is the condition where the capacity ratio (CR) is smaller than 0.9 and the heat-pump heater will cycle on/off to reach the required part-load Ph(Tj);

(85)‘degradation coefficient’ (Cdh) means the measure of efficiency loss due to cycling of heat-pump heaters; if Cdh is not determined by measurement then the default degradation coefficient is Cdh = 0.9;

(86)‘adjusted outlet temperature for cycling’ (Tcyc(Tj)) means the average outlet temperature during cycling of a heat-pump heater;

(87)‘bin-specific coefficient of performance’ (COPbin(Tj)) means the coefficient of performance of the electric heat-pump heater, derived from the part-load for heating, declared capacity for heating and declared coefficient of performance for specified bins and calculated for other bins by interpolation or extrapolation, corrected where necessary by the degradation coefficient;

(88)‘bin-specific primary energy ratio’ (FUE(Tj)) means the fuel-utilisation efficiency of the fuel heat-pump heater, derived from the part-load for heating, declared capacity for heating and declared fuel utilisation efficiency for specified bins and calculated for other bins by interpolation or extrapolation, corrected where necessary by the degradation coefficient;

(89)‘active mode coefficient of performance’ (ⴄ) means the weighted average coefficient of performance of an electric heat-pump heater;

(90)‘active mode seasonal fuel utilisation efficiency’ (SFUE) means the seasonal FUE, calculated as the hour (hj) weighted average of FUE(Tj) over the designated heating season, expressed in kW/kW;

(91)‘active mode seasonal auxiliary electricity factor’ (SAEFon) means the seasonal AEF in active mode, calculated as the hour (hj) weighted average of AEF(Tj) over the designated heating season, expressed in kW/kW;

(92)‘seasonal auxiliary electricity factor’ (SAEF) means the seasonal AEF, including electricity use in non-active modes Qaux, calculated as the reference annual heating demand divided by the annual energy consumption, expressed in kW/kW;

(93)‘seasonal coefficient of performance’ (SCOP) means the annual average coefficient of performance of an electric heat-pump heater in the designated heating season, calculated as the reference annual heating demand divided by the annual energy consumption;

(94)‘seasonal coefficient of performance in active mode’ (SCOPon) means the seasonal COP, calculated as the hour (hj) weighted average of COP(Tj) over the designated heating season, expressed in kW/kW;

(95)‘seasonal primary energy ratio’ (SPER) means the annual average primary energy ratio of a fuel heat-pump space-heater in the designated heating season, calculated from the SFUE and SAEF whereby the latter is converted to primary energy using CC;

(96)‘hybrid heat-pump heater electric resistance heat generator heat output’ (elbu(Tj)) means the heat output of an electric resistance heat generator supplementing the declared heat-pump capacity for heating to reach the part-load for heating Ph(Tj) in the bin with temperature Tj, expressed in kW;

(97)‘hybrid heat-pump heater fuel heat generator capacity’ (fuelbu(Tj)) means the heat output of a fuel heat generator supplementing the declared heat-pump capacity for heating, as appropriate, to reach the part-load for heating Ph(Tj) in the bin with temperature Tj, expressed in kW;

(98)‘off mode’ means a condition in which the heat-pump heater is connected to the mains power source and is not providing any function, or it is in a condition providing only:

(a)an indication of its off-mode condition;

(b)functionalities intended to ensure electromagnetic compatibility pursuant to Directive 2014/30/EU of the European Parliament and of the Council( 7 );

(99)‘thermostat-off mode’ of a heat-pump heater or hybrid heat-pump heater means the condition corresponding to the hours with no heating load and activated heating function, whereby the heating function is switched on, but the heat-pump-heater is not operational; cycling in active mode is not considered as thermostat-off mode;

(100)‘crankcase mode’ means the condition in which a crankcase heating device is activated to avoid the refrigerant migrating to the compressor so as to limit the refrigerant concentration in oil when the compressor is started;

(101)‘off mode power consumption’ (POFF) means the power consumption of a heat-pump heater or hybrid heat-pump heater in off mode, expressed in kW;

(102)‘thermostat-off mode power consumption’ (PTO) means the power consumption of the heat-pump heater or hybrid heat-pump heater while in thermostat-off mode, expressed in kW;

(103)‘crankcase mode power consumption’ (PCK) means the power consumption of the heat-pump heater or hybrid heat-pump heater while in crankcase mode, expressed in kW;

(104)‘hours in various operating modes’ are the number of annual hours in active mode (HHE), thermostat-off mode (HTO), standby mode (HSB), off mode (HOFF) and crankcase mode (HCK) for reversible and heating-only heat-pump heaters;

(105)‘off mode operating hours’ (HOFF) means the annual number of hours [hrs/a] the unit is considered to be in off-mode, the value of which depends on the designated season and function;

(106)‘thermostat-off mode operating hours’ (HTO) means the annual number of hours (hrs/a) the unit is considered to be in thermostat-off mode, the value of which depends on the designated season and function;

(107)‘standby mode operating hours’ (HSB) means the annual number of hours [hrs/a] the unit is considered to be in standby mode, the value of which depends on the designated season and function;

(108)‘crankcase mode operating hours’ (HCK) means the annual number of hours (hrs/a) the unit is considered to be in crankcase-heater-operation mode, the value of which depends on the designated season and function;

(109)‘additional auxiliary electricity consumption’(Qaux) of a heat-pump heater or the heat-pump heat generator comprising a hybrid heat-pump heater, means the annual auxiliary electricity consumption, in kWh/a, in thermostat-off mode, standby mode, off mode and crankcase heater mode from measured power and default hours in each mode;

(110)‘maximum ventilation exhaust air flow rate for space-heating’ (qv,maxh) is the maximum flow rate of exhaust air at temperature conditions that can be used when assessing the space-heating efficiency;

(111)‘switch temperature fuel boiler off’ (Tfb,off) for a hybrid heat-pump heater means the outdoor air temperature above which the fuel backup heater is not providing any heating capacity as it is switched off by the controls and heat is only provided by the heat-pump heat generator;

(112)‘switch temperature heat-pump on’ (Thp,on) for a hybrid heat-pump heater means the outdoor air temperature above which the heat-pump heat generator is switched on;

(113)‘test conditions’ means the test conditions defined in Annex III, Table 3;

(114)‘frequency’ in Hz is the number of rotations per second of the compressor or of the circulator or of the fan or of the engine of the heater; 

5.DEFINITIONS RELATED TO THE COOLING FUNCTION IN REVERSIBLE HEAT-PUMP HEATERS AND HYBRID HEAT-PUMP HEATERS COMPRISING REVERSIBLE HEAT-PUMP

(115)‘reversible heat pump heater’ means a heat-pump heater capable of both cooling and heating;

(116)‘cooling function’ means providing chilled water to a water-based cooling system;

(117)‘low cooling temperature application’ means an application where the reversible heat-pump heater delivers cooling at an indoor heat exchanger outlet temperature of 7 °C at design temperature, and at a specific water outlet temperature per part-load condition;

(118)‘medium cooling temperature application’ means an application where the reversible heat-pump heater delivers cooling at an indoor heat exchanger outlet temperature of 18 °C at design temperature, and at a specific water outlet temperature per part-load condition;

(119)‘free cooling’ means free cooling as defined in Annex VII, Part B, Section 1 of the Directive 2018/2001 ( 8 );

(120)‘water-based cooling system’ means the components or equipment necessary for the distribution of chilled water and the transfer of heat from indoor spaces to chilled water, where the purpose of the system is to attain and maintain the desired indoor temperature of an enclosed space, such as a building or parts thereof, for the thermal comfort of human beings;

(121)‘standard rated cooling capacity’ (PSR,c) means the cooling capacity of a reversible heat-pump when providing space cooling at ‘standard rating conditions’, expressed in kW;

(122)‘seasonal space cooling energy efficiency’ (ηs,c) means the ratio between the reference annual cooling demand pertaining to the cooling season covered by a heater, and the annual energy consumption for cooling, corrected by contributions accounting for temperature control and the electricity consumption of ground water pump(s), where applicable, expressed in %;

(123)‘seasonal energy-efficiency ratio’ (SEER) is the overall energy-efficiency ratio of the heater, representative for the cooling season, calculated as the ‘reference annual cooling demand’ divided by the ‘annual energy consumption for cooling’;

(124)‘reference annual cooling demand’ (QC) means the reference cooling demand to be used as the basis for the calculation of SEER and calculated as the product of the design cooling load (Pdesign,c) and the equivalent active-mode hours for cooling (HCE), expressed in kWh;

(125)‘annual energy consumption for cooling’ (QCE) means the energy consumption required to meet the ‘reference annual cooling demand’ and is calculated as the ‘reference annual cooling demand’ divided by the ‘active mode seasonal energy-efficiency ratio’ (SEERon) and the electricity consumption of the unit for thermostat-off, standby, off and crankcase mode during the cooling season, expressed in kWh;

(126)‘design cooling load’ (Pdesign,c) means the cooling load applied to a heater at the cooling reference design conditions defined in Annex III, Table 1, whereby the design cooling load (Pdesign,c) is equal to the declared cooling capacity at outdoor temperature (Tj) equal to the reference design temperature for cooling (Tdesign,c), expressed in kW;

(127)‘maximum ventilation exhaust air flow rate for space cooling’ (qv,maxc) is the maximum flow rate of exhaust air at temperature conditions that can be used when assessing the seasonal space cooling energy-efficiency;

(128)‘equivalent active mode hours for cooling’ (HCE) means the assumed annual number of hours the unit shall provide the ‘design cooling load’ (Pdesign,c) in order to satisfy the ‘reference annual cooling demand’, expressed in hours;

(129)‘active mode seasonal energy-efficiency ratio’ (SEERon) means the average energy-efficiency ratio of the unit in active mode for the cooling function, constructed from part-load and bin-specific energy-efficiency ratios (EERbin(Tj)) and weighted by the bin hours in which the bin condition occurs;

(130)‘cooling part-load ratio’ (plc(Tj)) means the outdoor temperature Tj minus 16 °C divided by the reference design temperature Tdesign,c minus 16 °C;

(131)‘part-load for cooling’ (Pc(Tj )) means the cooling load at a specific outdoor temperature, calculated as the design cooling load multiplied by the part-load ratio and expressed in kW;

(132)‘bin-specific energy-efficiency ratio’ (EERbin (Tj)) means the energy-efficiency ratio specific for every binj with outdoor temperature (Tj) in a season, derived from the part-load, declared capacity and declared energy-efficiency ratio (EERd (Tj)) and calculated for other bins through interpolation/extrapolation, when necessary corrected by the applicable degradation coefficient;

(133)‘seasonal primary energy ratio in cooling mode’ (SPERc) means the overall energy-efficiency ratio of the air conditioner or comfort chiller using fuels, representative for the cooling season;

(134)‘seasonal fuel utilisation efficiency in cooling mode’ (SFUEc) means the fuel utilisation efficiency for the whole cooling season;

(135)‘seasonal auxiliary energy factor in cooling mode’ (SAEFc) means the auxiliary energy-efficiency for the cooling season, including the contribution of thermostat-off mode, standby mode, off mode and crankcase-heater mode power modes;

(136)‘fuel utilisation efficiency at partial load’ means the fuel-utilisation efficiency when cooling (FUEc,bin) at outdoor temperature Tj;

(137)‘auxiliary energy factor in cooling mode at partial load’ (AEFc,bin) means the auxiliary energy-efficiency when cooling at outdoor temperature (Tj );

6.DEFINITIONS RELATED TO WATER HEATING IN COMBINATION HEATERS

(138)‘water heating energy-efficiency’ (ηwh) means the ratio between the useful energy in the drinking or sanitary water provided by a combination heater and the energy required for its generation, expressed in %;

(139)‘out of the box mode’ means the standard operating condition, setting or mode set by the manufacturer at factory level, to be active immediately after the heater installation, suitable for normal use by the end user according to the declared load profile;

(140)‘load profile’ means a sequence of water draw-offs, as specified in Annex III, Table 7; each combination heater meets at least one load profile;

(141)‘mixed water at 40 °C’ (V40), expressed in litres, is the equivalent of 40 °C water that the heater can deliver in standard conditions;

(142)‘water draw-off’ means a given combination of useful water flow rate, useful water temperature, useful energy content and draw-off temperature, as specified in Annex III, Table 7;

(143)‘useful water flow rate’ (f) means the minimum flow rate, expressed in litres per minute, for which hot water is contributing to the reference energy, as specified in Annex III, Table 7;

(144)‘useful water temperature’ (Tm) means the water temperature, expressed in degrees Celsius, at which hot water starts contributing to the reference energy, as specified in Annex III, Table 7;

(145)‘useful energy content’ (Qtap) means the energy content of hot water, expressed in kWh, provided at a temperature equal to, or above, the useful water temperature, and at water flow rates equal to, or above, the useful water flow rate, as specified in Annex III, Table 7;

(146)‘energy content of hot water’ means the product of the specific heat capacity of water, the average temperature difference between the hot-water output and cold-water input, and the total mass of the hot water delivered;

(147)‘draw-off temperature’ (Tp) means the average water temperature, expressed in degrees Celsius, to be achieved during water draw-off, as specified in Annex III, Table 7;

(148)‘reference energy’ (Qref) means the sum of the useful energy content of water draw-offs, expressed in kWh, in a particular load profile, as specified in Annex III, Table 7;

(149)‘maximum load profile’ means the tapping load profile with the greatest reference energy that a combination heater is able to provide while fulfilling the temperature and flow rate conditions of that load profile;

(150)‘daily electricity consumption’ (Qelec) means the consumption of electricity for water heating over 24 consecutive hours under the declared load profile, expressed in kWh in terms of final energy;

(151)‘daily electricity generation’ (Qelec_gen) means the generation of electricity by cogeneration combination heaters for water heating over 24 consecutive hours under the maximum load profile, expressed in kWh in terms of final energy;

(152)‘daily fuel consumption’ (Qfuel) means the consumption of fuels for water heating over 24 consecutive hours under the declared load profile, expressed in kWh in terms of GCV;

(153)‘annual electricity consumption’ (AEC) means the annual electricity consumption of a combination heater for water heating under the declared load profile and under given climate conditions, expressed in kWh in terms of final energy;

(154)‘annual fuel consumption’ (AFC) means the annual fuel consumption of a combination heater for water heating under the declared load profile and under given climate conditions, expressed in GJ in terms of GCV;

(155)‘ambient correction term’ (Qcor) means a term which considers the fact that the place where the combination heater is installed is not an isothermal place, expressed in kWh;

(156)‘self-learning’ means a function of the combination heater that automatically captures the end-user’s use patterns of the water-heating functionality of the combination heater;

(157)‘adaptive control’ means a control which adapts the temperature of the water stored in the combination heater depending on the use patterns captured with the self-learning function of the combination heater;

(158)‘adaptive control factor’ (FAC) means the water heating energy-efficiency gain due to adaptive control under the conditions set out in Annex III, Section 5.2, sub (b);

(159)‘adapt’ is a Boolean either equal to 0 or to 1;

(160)‘weekly electricity consumption with adaptive controls’ (Qelec,week,adaptive) means the weekly water heating electricity consumption of a combination heater with the adaptive control function enabled, expressed in kWh electricity;

(161)‘weekly fuel consumption with adaptive controls’ (Qfuel,week,adaptive) means the weekly water heating fuel consumption of a combination heater with the adaptive control function enabled, expressed in kWh in terms of GCV;

(162)‘weekly electricity consumption without adaptive controls’ (Qelec,week) means the weekly water heating electricity consumption of a combination heater with the adaptive control function disabled, expressed in kWh;

(163)‘weekly fuel consumption without adaptive controls’ (Qfuel,week) means the weekly water heating fuel consumption of a combination heater with the adaptive control function disabled, expressed in kWh in terms of GCV;

(164)‘control factor’ (Fctrl) means a factor accounting for the capability of instantaneous water heaters to set the water temperature independently of the water flow;

(165)‘Passive Flue Heat Recovery Device’ (PFHRD) means a device integrated in the appliance or supplied with the appliance to transmit waste heat from the combustion products to the domestic hot water, as set out in Annex III, Section 5;

(166)‘maximum ventilation exhaust air flow rate for water heating’ (qv,maxw) is the maximum flow rate of exhaust air at temperature conditions, as set out in Annex III, Table 6, that can be used when assessing the water-heating efficiency;

(167)‘off-peak combination heater’ means a combination heater that is able to work in an off-peak application;

(168)‘off-peak application’ means the ability of the water heater to be automatically (without the intervention of the end-user each time) energised for a maximum period of 8 consecutive hours between 22:00 and 07:00 of the 24-hour tapping pattern in the load profiles, as set out in Annex III, Section 5;

7.DEFINITIONS RELATED TO SOLAR DEVICES

(169)‘solar collector’ means a device designed to absorb solar irradiance and to transfer the thermal energy so produced to a fluid passing through it;

(170)‘Gross thermal yield’ (GTY) means the reference annual thermal yield of the collector array of the solar device for a specific climate, in kWh/a, as set out in Annex VII, Section 7, calculated as the simple average of the thermal yield for the 25ºC and 50ºC collector operating temperature, in kWh/a;

(171)‘Gross area’(Ag) means the maximum projected area covered by the outer dimensions of the collector array, expressed in m²;

(172)‘solar device efficiency for space-heating’ (ηsol,sh) means the efficiency of a solar device for space-heating, considering the energy-efficiency class of the tank if applicable, calculated by multiplying the solar device factor by the tank-correction factor and expressed in %;

(173)‘solar device factor for space-heating’ (fsol,sh) means a factor (>1) for the contribution of a solar device to the seasonal space-heating efficiency of a space-heater comprising a package, as set out in Annex III, Section 8 and Section 10;

(174)‘solar device efficiency for water heating’ (ηsol,wh) means the efficiency of a solar device for water heating, considering the energy-efficiency class of the tank if applicable, calculated by multiplying the solar-device factor with the tank-correction factor, and expressed in %;

(175)‘solar device factor for water heating’ (fsol,wh), means a factor (>1) representing the contribution of a solar device to the water heating efficiency of a package of combination heater and solar device, as set out in Annex III, Section 8 and Section 11;

(176)‘tank factor’ (ftank) means a factor in the calculation of the solar device efficiency that depends on the energy-efficiency class of the solar hot-water storage tank, as set out in Annex III, Section 8;

(177)‘non solar heat required’ Qnonsol is the part of the annual water heating demand which is not covered by the solar-device yield and therefore shall be provided by the water heater, in kWh/a;

(178)‘annual solar water heating demand’ Qwh,sol is the water-heating demand per year to be met by the combination of solar device and water heater, in kWh/a;

(179)‘solar heat delivered’ Qsol is the part of the annual water-heating demandthat is covered by the solar-device yield, in kWh/a;

8.DEFINITIONS RELATED TO HOT WATER STORAGE TANKS

(180)‘standing loss’ (S) means the heating power dissipated from a hot-water storage tank at standard-rating conditions, expressed in W;

9.DEFINITIONS RELATED TO SHOWER WATER HEAT RECOVERY DEVICES

(181)‘shower water heat recovery device factor’ (fSWHRD,lp) means a factor representing the water-heating energy-efficiency gains of a combination-heater package comprising a shower-water heat-recovery device for a specific load profile;

(182)‘shower water heat recovery efficiency’ (ηSWHRD,lp) means the thermal efficiency of the shower-water heat-recovery device calculated as the ratio of the heat recovered by the device divided by the heat supplied to the device for a specific load profile;

10.DEFINITIONS RELATED TO PACKAGES

(183)‘package seasonal space-heating efficiency’ ( means the ratio between the space-heating demand supplied by the package and the annual energy consumption required to meet this demand, expressed in %

(184)‘package water heating energy efficiency’ (ηwh,pack) means the ratio between the useful energy provided by a water heating package and the energy required for its generation, expressed in %;

11.DEFINITIONS RELATED TO TEST METHOD

(185)‘compensation method’ means a dynamic test method in which the space-heater is delivering heating (or cooling) to a water loop of representative physical or simulated inertia to maintain an indoor air or water temperature set-point by compensating for a given physical or simulated heating (or cooling) load;

ANNEX II

Ecodesign requirements

1.REQUIREMENTS FOR SPACE-HEATING ENERGY EFFICIENCY

1.1.Minimum space-heating energy-efficiency requirements

The seasonal space-heating energy efficiency ηs,h (in %) of the specified heaters in average climate conditions shall not be lower than the values given in Table 1.

1.2.Modulation requirements for boilers

1.The turndown ratio of fuel boiler heaters using gaseous fuels with a standard-rated heat output lower than or equal to 70 kW, with the exemption of B1 boiler heaters, shall be lower than or equal to 20 %.

2.The turndown ratio of fuel boiler heaters with a standard-rated heat output lower than or equal to 70 kW using liquid fuels, with the exemption of B1 boiler heaters, shall be lower than or equal to 40 %.

Table 1

Minimal seasonal space-heating efficiency

*packages are not included; there are no minimum seasonal space-heating efficiency requirements for packages, only for heaters included in packages

1.3.Requirements for heat-pumps

1.Heat pumps are at least able to work at low temperature heating application and/or at medium temperature application in average climate conditions.

2.Reversible heat pumps are at least able to work at low temperature cooling application and/or at medium temperature cooling application in cooling conditions.

3.Regarding heat-pump heaters and hybrid heat-pump heaters that (i) are not single speed heat-pumps and (ii) that have a standard-rated heat output of 70 kW or less, the use of the compensation method for the assessment of the seasonal space heating energy efficiency and of the seasonal space cooling energy efficiency should be introduced as set in Article 11 of the present Regulation;

4.Heat-pump heaters and hybrid heat-pump heaters tested according to the compensation method shall not cycle on/off when tested for compensation loads equal to or higher than the declared heating (respectively cooling) output of the unit in continuous operation A, B, C, D, E, F and G defined in Annex III Table 3 (respectively A, B, C and D defined in Annex III Table 9 in cooling mode).

2.REQUIREMENTS FOR WATER HEATING

2.1.Declared load profile

The load profile for the calculation of the water heating energy efficiency shall be the maximum load profile.

For heat pumps using outdoor air, the load profiles may be different for the three (average, colder and warmer) climate conditions.

2.2.Water heating energy-efficiency requirements

The water heating energy-efficiency (ηwh) of specified combination heaters, in % for specified load profiles defined in Annex III, shall not be lower than the values indicated in Table 2.

Table 2

Minimal water heating energy-efficiency requirements

*packages are not included

2.3.Mixed water at 40 °C amount requirements

The minimum amount of mixed water at 40 °C that can be provided by a combination heater shall not fall below the values indicated in Table 3.

Table 3

Minimum amount of mixed water at 40 °C

2.4.Water supply at 50 °C requirement

Combination heaters shall be able to supply water at 50 °C in ‘out of the box mode’ when required in the load profile. For outdoor air heat pump combination heaters, this requirement shall also apply for warmer and colder climate conditions.

3.REQUIREMENTS FOR SOUND-POWER LEVEL

The sound-power level of heaters in heating mode shall not exceed the values indicated in Table 4 when providing space-heating.

Heat-pumps and hybrid heat-pumps shall use the test settings indicated in article 11 of this regulation to measure sound-power levels.

Table 4

Maximum sound-power level

4.REQUIREMENTS RELATED TO EMISSIONS OF NITROGEN OXIDES

1.Emissions of nitrogen oxides, expressed in nitrogen dioxide, of heaters using liquid or gaseous fuels shall not exceed the values indicated in Table 5.

2.In case the heat-pump heater is declared for use in medium-temperature heating applications and/or low-temperature application it shall meet the requirement regarding nitrogen oxides emissions in medium-temperature heating applications.

3.In case the heat-pump heater is declared for use in low-temperature heating applications only, it shall meet the requirement regarding nitrogen oxides emissions in low-temperature heating applications.

4.The values given in the Table 5 referring to heaters using gaseous fuels apply to heaters using second-family gases, to be tested with G20 reference gas, and gas heaters only used with G25 reference gas.

5.For boiler heaters (including boiler heaters in hybrid heaters) using only third family gases, to be tested with G30 reference gas, the emissions of nitrogen oxides, expressed in nitrogen dioxide, of heaters shall not exceed the limit values for second family gases indicated in Table 5, multiplied by a factor 1.30.

6.For boiler heaters (including boilers in hybrid heaters) using only propane, to be tested with G31 reference gas, the emissions of nitrogen oxides, expressed in nitrogen dioxide, of heaters shall not exceed the limit values for second-family gases indicated in Table 5, multiplied by a factor 1.20.

Table 5

Maximum emissions of nitrogen oxides

5.REQUIREMENTS FOR MATERIAL RESOURCE EFFICIENCY

5.1.Applicability

Requirements set out in this section shall apply to heaters with a standard-rated heat output of 70 kW or less.

5.2.Availability of spare parts

7.For all heaters placed on the market as from dd.mm.yyyy [the date = 24 months after the date of entry into force of this Regulation – OP – Please insert reference] manufacturers, importers or authorised representatives shall make available to professional repairers at least the following spare parts:

(a)the circulator and its parts (including flow rate control),

(b)ignition spark plugs,

(c)sensors (including thermostats, pressure gauge, control sensors, other sensors for temperature or pressure),

(d)electric fuses (separately or bundled together),

(e)proprietary seals and connection means (including special bolts, nuts, washers, and clamps),

(f)fans or fan assemblies (including fan motors and fan wheels),

(g)compressors and their parts,

(h)burners,

(i)flow meters,

(j)printed circuit boards, 

(k)valves and actuators, (including electrically operated valves, 3-way valve, and gas valves),

(l)the heater housing and its parts,

(m)heat generators and their parts,

(n)heat exchangers,

(o)piping,

(p)gaskets and seals,

(q)buttons, switches, and knobs,

(r)impellers,

(s)cables and plugs,

(t)displays and status indicators,

(u)software and firmware, including reset software;

8.Manufacturers, importers or authorised representatives shall make available to end-users at least the following spare parts:

(a)Remote control 

9.Availability of spare parts referred to in points 1 and 2 of the present section shall be ensured for a minimum period that starts either on dd.mm.yyyy [the date = 24 months after the date of entry into force of this Regulation – OP – Please insert reference] or when the first unit of the concerned model is placed on the market or put into service, whichever is the latest, and ends at least, ten years after the last unit of that model is placed on the market or put into service (the ‘minimum period’).

10.To ensure such availability for the entire minimum period, manufacturers, their authorised representatives or importers shall provide a list of spare parts indicative pre-tax prices, at least in euro, for all spare parts listed in points 1 and 2 of the present section, including the indicative pre-tax price of fasteners and tools, if supplied with the spare part, and the instructions for ordering them and on the free access website of the manufacturer, authorised representative or importer.

11.Manufacturers, authorised representatives or importers of heaters shall ensure that the spare parts mentioned in points 1 and 2 can be replaced without tools or with tools that are not proprietary tools and without permanent damage to the heater.    

12.When manufacturers, authorised representatives or importers make available software and firmware updates for heaters using software, these shall remain available for a minimum of ten years after the placing of the last unit of that heater on the market, and those updates shall be provided free of charge.

5.3.Maximum delivery time for spare parts

During the minimum period, manufacturers, importers or authorised representatives shall ensure the delivery of the spare parts within 15 working days after having received the order.

5.4.Access to repair and maintenance information

1.Manufacturers, importers or authorised representatives shall, during the minimum period referred to in point 5.2.3, provide access to the repair and maintenance information to professional repairers considering the following:

(a)the manufacturer’s, importers or authorised representative’s website shall indicate the process for professional repairers to request access to the repair and maintenance information; to accept such a request, the manufacturers, importers or authorised representatives may only require the professional repairer to demonstrate that:

(i)the professional repairer has the technical skill to repair heaters and complies with the applicable regulations for repairers of the heaters in the Member States where it operates; reference to an official registration system as professional repairer, where such a system exists in the Member States concerned, shall be accepted as proof of compliance with this point;

(ii)the professional repairer is covered by insurance covering liabilities resulting from its activity regardless of whether this is required by the Member State.

(b)the manufacturers, importers or authorised representatives shall accept or refuse the request within five working days;

(c)manufacturers, importers or authorised representatives may charge reasonable and proportionate fees for access to the repair and maintenance information or for providing regular updates; a fee is reasonable only if it does not discourage access by failing to consider the extent to which the professional repairer uses the information;

(d)once the request is accepted, a professional repairer shall have access, within one working day, to the requested repair and maintenance information. The information may be provided for an equivalent model or one of the same product ranges, if relevant;

(e)the heater repair and maintenance information referred to in point (1) shall include:

(i)the unequivocal heater identification;

(ii)a disassembly map or exploded view;

(iii)a technical manual of instructions for repair;

(iv)a list of necessary repair and test equipment;

(v)component and diagnosis information (such as minimum and maximum theoretical values for measurements);

(vi)wiring and connection diagrams;

(vii)diagnostic fault and error codes (including manufacturer-specific codes, where applicable);

(viii)instructions for installation of relevant software and firmware including reset software;

(ix)information on how to access data stored on the heater, including data stored in accordance with Section 7 point 7.4 and records of reported failure incidents stored on the heater (where applicable);

(x)electronic board diagrams.

2.Without prejudice to intellectual property rights, third parties shall be allowed to use and publish unaltered repair and maintenance information initially published by the manufacturer, importer or authorised representative and covered by point (e) once the manufacturer, importer or authorised representative terminates access to that information after the end of the period of access to repair and maintenance information.

5.5.Dismantling for material recovery and recycling while avoiding pollution

Manufacturers, importers or authorised representatives shall ensure that heaters are designed in such a way that the materials and components referred to in Annex VII to Directive 2012/19/EU of the European Parliament and of the Council ( 9 ) can be removed without tools or with tools that are not proprietary tools.

6.PRODUCT-INFORMATION REQUIREMENTS

1.With effect from dd.mm.yyyy [the date = 24 months after the date of entry into force of this Regulation – OP – Please insert reference], the information on products set out in point 2 to 8 of this section:

a.in the technical documentation for the purposes of conformity assessment;

b.in the user manual supplied with the product;

c.on the free access websites of the manufacturer, its authorised representative or the importer, for a period of at least 10 years after the placing on the market of the last unit of the model concerned.

2.The following product information shall be included or displayed as indicated in point 1 of this section:

a.for fuel boiler heaters – Table 6;

b.for electric boiler heaters – Table 7;

c.for cogeneration heaters – Table 8;

d.for cogeneration heaters with a backup boiler Table 9;

e.for heat-pump heaters and hybrid heat-pump heaters – Table 10 (in this table, information for high-temperature applications is optional) and part A of Table 11 only for average climate and medium-temperature heating applications, or for average climate and low-temperature heating applications for heat pump heaters that cannot operate in average climate and medium-temperature heating applications;

f.for reversible heat-pump heaters and hybrid heat-pump heaters, additionally the information set out in part A of Table 12;

g.for combination heaters, information set out in Table 13 for the load profile declared in accordance with Section 2.1; for outdoor heat pump combination heater, the information set in Table 13 for average climate conditions, for colder climate and for warmer climate conditions;

h.for temperature controls – Table 14;

i.for solar devices – Table 15;

j.for shower water heat recovery devices – Table 16;

k.for packages – Table 17.

If a given parameter is not applicable to the product, the expression ‘N/A’ shall identify it as not applicable.

3.For products or packages in the scope of Regulation (EU) [2026/ xxx] [the reference to the energy regulation to be published on the same date ( 10 ) – OP – Please insert reference], the link to the model of the product or to the model of the package in the European Product Registry for Energy Labelling (EPREL) as a human-readable Uniform Resource Locator (URL) or as QR code or by providing the product or package registration number.

4.As regards self-monitoring data, information on:

(a)how the end-user or third parties can access the data stored in accordance with Section 7.4 of this Annex;

(b)how the access to data by third parties can be granted and revoked by the end-user;

(c)the remote collection and reporting of data by the manufacturer (if applicable).

5.Any specific precautions that shall be taken when the heater is assembled, installed or maintained.

6.For B1 boiler heaters and electric boiler heaters, the following standard text:

This heater contains a natural draught boiler, which is intended to be connected only to a flue shared between multiple dwellings in existing buildings that evacuates the residues of combustion to the outside of the room containing the boiler. It draws the combustion air directly from the room and incorporates a draught diverter. Due to lower efficiency, any other use of this boiler shall be avoided and would result in higher energy consumption and higher operating costs.

7.Along the availability of specific operating modes such as ‘eco mode’ or ‘low noise mode’ also the impact on heating output (or cooling output or electric output), energy consumption and seasonal space heating (and possibly water heating and/or cooling) energy efficiency, using one or several test conditions necessary to calculate the seasonal space heating (and possibly water heating and/or cooling) energy efficiency.

8.For energy-smart appliances in case the manufacturer includes a logo pursuant to the requirements of section 9 indicating that the product complies (interoperability of energy smart appliances), the information in part A of the Table 18 of this annex;

7.ADDITIONAL INFORMATION TO BE PART OF THE Technical documentation

The technical documentation for the purposes of both conformity assessment and verification procedures shall, in addition to the information listed in point 6.2, contain the following elements:

1.a general description of the model, allowing it to be unequivocally and easily identified, and of its intended use;

2.references to the harmonised standards applied or other measurement standards used;

3.detailed information for verification as follows:

(a)for heat-pump heaters and hybrid heat-pump heaters – one part B of Table 11 of this annex for each combination of climate and temperature application for which a seasonal space heating energy efficiency value has been declared in part A of Table 11;

(b)for reversible heat-pump heaters and hybrid heat-pump heaters – one part B of Table 12 of this annex for each temperature application for which a seasonal space cooling energy efficiency value has been declared in part A of Table 12;

(c)for energy-smart appliances in case the manufacturer includes a logo pursuant to the requirements of section 9 indicating that the product complies (interoperability of energy smart appliances), the part B of Table 18 of this annex;

4.the details and the results of calculations performed in accordance with Annex III;

5.testing conditions, where they are not described sufficiently in the references provided pursuant to point 2;

6.a list of all equivalent models, including the model identifier;

7.where the information included in the technical documentation for a particular model has been obtained either from a model that has the same technical characteristics relevant for the technical information to be provided but is produced by a different manufacturer, or by calculations based on design or extrapolation from another model of the same or a different manufacturer, or both, the following:

(a)the details of the calculations, including a detailed mathematical model;

(b)the details of the assessment undertaken by the manufacturer to verify the accuracy of the calculation, including detailed description of any tests undertaken to verify the accuracy of the calculations;

(c)where appropriate, the declaration of identity between the models of different manufacturers.

8.For products that are subject to third party conformity assessment procedures pursuant to the present Regulation the technical documentation shall also contain:

(a)the identification number of the relevant notified body;

(b)the initial date at which the product was first placed on the market.

The technical documentation shall include the information in the order and as set out in Annex V of the Regulation (EU) [2026/ xxx] [the reference to the energy regulation to be published on the same date (see footnote 10) – OP – Please insert reference].

8.Information to be provided on the product

1.For B1 boiler heaters, the following information shall be durably marked on the product: ‘type B1 boiler’ or ‘type B1 combination boiler’, as applicable.

2.For cogeneration space-heaters, the standard-rated electric output in kW shall be durably marked on the product.

9.USE OF SMART APPLIANCE LOGO AND Information to be provided on the interoperability of the energy smart appliances

1.The smart appliance logo can be affixed on the product, on the packaging and/or in the instructions manual provided the conditions of points 2 to 4 below are satisfied.

2.In case the interoperability logo set out in Annex III, point 1.(a).X of the [Commission delegated regulation EU EU) …/2026 of XXX on energy label for space heaters] is affixed on the product, on the packaging and/or in the instructions manual, it shall be:

(a)clearly visible, indelible and shall have a height of at least 5 mm when affixed to the nameplate, or 7 mm when affixed to the enclosure, packaging or the instruction manual. If the logo is enlarged, the proportions set out in the drawings shall be maintained.

(b)The reference colours for the logo shall be black and white.

(c)However if the logo is used on a dark background, the interoperability logo may be used in a negative format using the same background colour.

(d)If the product nameplate enclosure packaging or instructions only use a black and white format or other analogous monochrome formats, the interoperability logo may use only those colours.

3.The information on interoperability of products set out in Table 18, parts A and B, shall be part of the technical documentation for the purposes of conformity assessment.

4.The information on interoperability of products set out in Table 18, part A shall be included in the user or instruction manuals and displayed visible in free access website of manufacturers, authorised representatives and importers.

Table 6

Fuel boiler heaters

(1) Based on the [2026/ xxx] (see footnote 10)

Table 7

Electric boiler heaters

Based on [2026/ xxx] (see footnote 10)

Table 8

Cogeneration heaters

(1) Based on the [2026/ xxx] (see footnote 10)

Table 9

Cogeneration heaters with backup boiler

(1) Based on [2026/ xxx] (see footnote 10)

Table 10

Heat-pump heaters and hybrid heat-pump heaters (general information)

(1) Based on [2026/ xxx] (see footnote 10)

Table 11

Heat-pump heaters and hybrid heat-pump heaters (Calculation of seasonal space-heating energy efficiency)

Table 12

Heat-pump heaters and hybrid heat-pump heaters (3 – Cooling)

Table 13

Water heating parameters

(1) Based on [2026/ xxx] (see footnote 10)

Table 14

Temperature controls

Table 15

Solar devices

*    Not less than 100% and not more than 300%.

**    Not less than 100% and not more than 240% for colder climate conditions, 450% for average climate conditions and 500 % for warmer climate conditions.

*** Additional cells with corresponding values can be included based on the number of solar collectors and the gross collector area. The " […] " notation signifies that the table may be extended, following the structure of the referenced table.

**** All provided values are subject to potential modifications or adjustments, as necessary, depending on specific declarations made by the manufacturer.

****** The " […] " notation also indicates that the table may be extended with additional rows below depending on the manufacturer’s declarations.

Table 16

Devices for recovering heat from shower water

Table 17

Packages

(1) Based on [2026/ xxx] (see footnote 10)

Table 18

Energy smart appliances

10.REQUIREMENTS RELATED TO SELF-MONITORING

10.1.Scope of the self-monitoring requirements

Requirements set out in this section shall apply to heaters with a standard-rated heat output of 70 kW or less.

10.2.General requirements

Depending on its type, the heater shall determine, store and display:

(a)the energy input to the heater (electricity, gaseous or liquid fuels); in case several types of energy sources are used by the unit, energy input for each and all energy sources shall be determined;

(b)the thermal energy output, meaning space heating for all heaters and also space cooling for reversible heaters; the thermal energy output shall be measured;

(c)for cogeneration heaters and cogeneration heater with backup boiler, electrical energy output;

(d)the energy efficiency (the ratio of thermal energy output and electrical energy output to energy input); in order to calculate it, electricity must be converted to primary energy with a CC equal to 1,9 for consumed electricity and a coefficient of 2,65 for cogenerated electricity and using fuel gross calorific value (GCV).

(e)number of on/off cycles (number of periods for which the heater has been stopped by the thermostat) and

(f)for combination heaters, whether the heater is used for space heating or sanitary water heating.

10.3.Requirements related to data display

1.Instantaneous values shall be displayed at a sample rate of a maximum of 1 minute.

2.The display option shall be available from the main menu of the end-user interface.

3.Instantaneous and average data referred to in point 10.4 shall be displayed on the display of the heater or remotely (for example by means of a computer application, mobile application, website, or dedicated separate display).

10.4.Requirement related to data storage

1.The values mentioned in point 10.2 shall be stored with the following frequency: instantaneous values for two days, average values of any hour, day, week, month and year, covering the period of at least the previous 24 months or the period since the heater installation, whichever period is shorter.

2.For heaters which allow for communication with a building automation and control system, data referred to in this point can be stored in the building automation and control system.

3.Data stored in accordance with this point shall be accessible to end-user or third parties by means of a standard interface, such as for example USB port, SD-card or Wi-Fi connection, in machine-readable format (such as for example a csv or xml file), without undue delay.

ANNEX III

Measurements and calculations

1.INTRODUCTION

For the purposes of verification of conformity and of compliance with the requirements of this Regulation, measurements and calculations shall be made using harmonised standards the reference numbers of which have been published for this purpose in the Official Journal of the European Union, or using other reliable, accurate and reproducible methods that consider the generally recognised state-of-the-art methods and are in conformity with the provisions of this Annex and Annex IV.

Measurements and calculations should be performed using the data provided in accordance with Annex II and additional data required in accordance with this Annex. Where a parameter is declared as part of the technical documentation, its declared value shall be used by the manufacturer, importer, or authorised representative for the calculations in this Annex.

2.CALCULATION OF SEASONAL SPACE-HEATING ENERGY EFFICIENCY (ηs,h) 

2.1.Fuel boiler heaters, electric boiler heaters and cogeneration heaters

The seasonal space-heating efficiency ηs,h,, expressed in %, for fuel boiler heaters, electric boiler heaters and cogeneration space-heaters shall be calculated in the following way:

where:

–ηson is the seasonal space-heating energy efficiency in active mode, calculated in Annex III, Section 4 hereafter;

–ΣF(i) is the sum of the values of correction factors for controls, auxiliary energy and standby heat loss, calculated and applied in accordance with Annex III, Section 5 hereafter.

2.2.Electric heat-pump heaters and hybrid heat-pump heaters

(a)The seasonal space-heating efficiency ηs,h, expressed in %, for electric heat-pump heaters shall be calculated in the following way:

where:

–CC is the conversion coefficient;

–ΣF(i) is the sum of the values of correction factors for controls and auxiliary energy, calculated in Annex III, Section 5;

–SCOP is the seasonal coefficient of performance, calculated in accordance with point (b).

(b)The seasonal coefficient of performance (SCOP) shall be calculated in the following way:

where:

–QH is the annual heat demand (in kWh/a), calculated in accordance with point (c);

–QHE is the annual heating energy consumed (in kWh/a), calculated in accordance with point (d).

(c)The annual heating demand (QH) shall be calculated in the following way:

where:

–Pdesignh is the design heat load (in kW), in the reference design conditions set out in Table 1;

–HHE is the equivalent number of annual hours in active mode, set out in Table 2.

(d)The annual heating energy consumed (QHE) shall be calculated in the following way:

where:

–QH is the annual heat demand (in kWh/a), calculated in the accordance with point (c);

–SCOPon is the active mode coefficient of performance, calculated in Annex III, Section 4.5;

–Qaux is the additional annual auxiliary electricity consumption, in kWh/a, calculated in accordance with point (e).

(e)The additional annual auxiliary electricity consumption shall be calculated in the following way:

where:

–HTO are the annual hours in thermostat-off mode, indicated in Table 2;

–HSB are the annual hours in standby mode, indicated in Table 2;

–HCK are the annual hours in crankcase mode, indicated in Table 2;

–HOFF are the annual hours in off mode, indicated in Table 2;

–PTO is the measured power in thermostat-off mode;

–PSB is the measured power in standby mode;

–PCK is the measured power in crankcase mode;

–POFF is the measured power in off mode.

2.3.Fuel heat-pump heaters

(a)The seasonal space-heating efficiency ηs,h expressed in %, shall be calculated in the following way:

where:

–ΣF(i) is the sum of the values of correction factors for controls and auxiliary energy, calculated in Annex III, Section 5;

–SPER is the seasonal primary energy ratio, calculated in the following way:

SPER=

where:

–SFUE is the seasonal fuel-utilisation efficiency in active mode, calculated in accordance with point 4.6.(c);

–SAEF is the seasonal auxiliary electricity factor, calculated in accordance with point (b);

(b)The seasonal auxiliary electricity factor (SAEF) shall be calculated in the following way:

SAEF =

where:

–QH is the annual heat demand (in kWh/a), calculated in accordance with point (c);

–QHElec is the annual electricity consumption (in kWh/a), calculated in accordance with point (d);

(c)The annual heating demand (QH) shall be calculated in the following way:

where:

–Pdesignh is the design heat load (in kW), at the reference design conditions set out in Table 1;

–HHE is equivalent number of annual hours in active mode, set out in Table 2;

(d)The annual electricity consumption (QHElec) shall be calculated in the following way:

where:

–QH is the annual heat demand (in kWh/a), calculated in the accordance with point (c);

–SAEFon is the active mode coefficient of performance, calculated in accordance with Annex III, Section 4.5;

–Qaux is the additional annual auxiliary electricity consumption, in kWh/a, calculated in accordance with point (e);

(e)The additional annual auxiliary electricity consumption shall be calculated in the following way:

where:

–HTO are the annual hours in thermostat off mode, indicated in Table 2;

–HSB are the annual hours in standby mode, indicated in Table 2;

–HCK are the annual hours in crankcase mode, indicated in Table 2;

–HOFF are the annual hours in off mode, indicated in Table 2;

–PTO is the measured power in thermostat off mode;

–PSB is the measured power in standby mode;

–PCK is the measured power in crankcase mode;

–POFF is the measured power in off mode.

Table 1

Heating and cooling outdoor air temperature reference design conditions for reversible heaters, temperatures in dry bulb air temperature (wet bulb air temperature indicated in brackets)

Table 2

Heat-pump heater number of hours used (h/a)

3.CALCULATION OF PARAMETERS FOR ACTIVE MODE: SEASONAL SPACE-HEATING ENERGY EFFICIENCY IN ACTIVE MODE (ηson), SEASONAL AUXILIARY ELECTRICITY FACTOR IN ACTIVE MODE (SAEFon) AND SEASONAL FUEL-UTILISATION FACTOR (SFUE)

3.1.Fuel boiler heaters

The seasonal space-heating efficiency ηson, expressed in %, for the fuel boiler heaters, shall be calculated in the following way:

,

where:

–η1 is the efficiency at 30 % of the standard-rated heat input Phs;

–η4 is the efficiency at standard-rated heat input Phs.

3.2.Electric boiler heaters

The seasonal space-heating efficiency ηson, expressed in %, for the fuel boiler heaters, shall be calculated in the following way:

,

where η4 is the useful efficiency at standard-rated heat output P4, calculated in the following way:

where:

–P4 is the standard-rated heat output expressed in kW;

–EC is the electric power consumption to produce the standard-rated heat output P4;

–CC is the conversion coefficient.

3.3.Cogeneration space heaters

The seasonal space-heating efficiency ηson, expressed in %, for cogeneration heaters, shall be calculated in the following way:

where:

–P4 is the standard-rated heat output expressed in kW;

–Pel is the standard-rated electric power output expressed in kW;

–Phs is the standard-rated heat input in GCV of the fuel input in kW.

3.4.Cogeneration space heater with fuel backup heater

(a)The seasonal space-heating efficiency ηson, expressed in %, for cogeneration heater with fuel backup heater, shall be calculated in the following way:

,

where:

–η1 is the efficiency at 30 % of the standard-rated heat output P4, calculated in accordance with point (b);

–η4 is the efficiency at standard-rated heat output P4;

(b)η1 shall be calculated in the following way:

(i)For a cogeneration heater with fuel backup heater, for which the maximum output of the cogeneration heat generator in 30/50 temperature regime is equal to or higher than 30 % of P4:

,

where:

–is the efficiency of the cogeneration heater alone in 30/50 temperature regime;

–PCHP is the heat output, when only the cogeneration heat generator is supplying heat, in a 30/50 temperature regime, expressed in kW;

–Pel_CHP is the rated electric power output, when only the cogeneration heat generator is supplying heat, in a 30/50 temperature regime, expressed in kW;

–Pinput_CHP is the heat input power in GCV of the liquid fuel or gaseous fuel input of the cogeneration, when only the cogeneration heat generator is supplying heat, in a 30/50 temperature regime, expressed in kW.

(ii)For a cogeneration heater with a fuel backup heater, for which the maximum output of the cogeneration heat generator in a 30/50 temperature regime is lower than 30 % of P4:

where α is the proportion of the time the cogeneration heat generator is supplying heat alone in order to reach 30 % of the standard-rated heat output, in a 30/50 temperature regime, calculated as follows:

3.5.Electric heat-pump heaters and hybrid heat-pump heaters

(a)The active-mode seasonal coefficient of performance SCOPon is calculated in the following way:

where:

–is frequency of outdoor temperature in the temperature bin j, expressed in hours;

–Ph(Tj) is the part-load for heating, calculated in accordance with point (b);

–Padd(Tj) is the additional heat output required to be supplied by the backup heater, when the electric heat-pump heater is not able to supply Ph(Tj) on its own, calculated in accordance with point (c);

–Inputadd(Tj) is the additional energy input consumed by the backup heater, calculated in accordance with point (d);

–COPbin(Tj) is the bin-specific coefficient of performance, calculated in accordance with point (e).

(b)The part-load for heating Ph(Tj) shall be calculated as follows:

where:

–Pdesign,h is the design load;

–pl(Tj) is the part-load ratio.

(c)The additional heat output (Padd(Tj)) shall be calculated in the following way:

(i)for heat-pump heaters without backup heater it is equal to 0;

(ii)for electric heat-pumps with electric backup heater, it is the power output of the electric backup heater:

Padd(Tj) = elbu(Tj)

(ii)for hybrid heat-pump heaters, it is the heat output of the fuel backup heater:

Padd(Tj) = fuelbu(Tj)

(d)The additional final energy input (Inputadd(Tj)) shall be calculated in the following way:

(i)for heat-pump heaters it is equal to 0;

(ii)for electric heat-pump heater with electric backup heater, it is the power input to the electric backup heater and is equal to the heat output of the backup heater supposing a heating efficiency of 1 for the electric backup heater:

Padd(Tj) = elbu(Tj)

(ii)for hybrid heat-pump heaters, it is the heat input to the fuel backup heater:

,

where:

–fuelbu(Tj) is the bin-specific heat output of the fuel backup heater;

–is the seasonal space-heating efficiency of the fuel backup heater;

–F(1) is the control correction factor defined in Section 5.1.

(e)Declared values for COPd(Tj) and Pdh(Tj) are the measured values at the part-load test conditions for outdoor temperatures Tj (‘bins’) A to G and Pdesign,h, as indicated in Table 3. The values for COPbin(Tj) shall be determined through interpolation and extrapolation of known values. If the heat-pump capacity is higher than the heat demand in a bin by more than 10 %, the heat-pump will cycle on/off and a degradation factor (Cdh) and a capacity ratio (CR) have to be used to calculate the COPbin for Tj in the following way:

where:

–CR is the capacity ratio, calculated in accordance with point (f);

–Cdh is the degradation coefficient for cycling behaviour; it is either 0.9 by default or it can be determined by a series of cyclic tests; it is then calculated as the ratio between the power during the off phase divided by the power during the on phase.

For cycling, the water temperature regime in the on phase is modified to maintain the same average water-temperature regime over the whole on/off cycle as in the stationary condition without cycling.

(f)The capacity ratio CR for the purposes of point (e) is calculated in the following way:

where:

–Pl(Tj) is the part-load ratio;

–Pdesignh is the design load;

–Pdh is the minimum capacity for heating in continuous operation.

(g)Test method for hybrid heat pumps

–The seasonal space-heating energy efficiency (ηs,h) of hybrid heat-pump heaters may be determined by testing the heating capacity and the efficiencies of the two heat generators (fuel boiler, electric heat-pump) separately, as long as this separate method does not deviate significantly from the results obtained with the joint method, in which the two heat generators are both working at the various test points according to the hybrid controller.

–For a separate determination, the tests for the heat-pump part of the hybrid heat-pump heater shall be conducted with only the heat-pump in operation and the other heat generator comprising the hybrid heat-pump heater hydraulically connected, for part-load conditions set out in Table 3 of this Annex, for outdoor temperature conditions greater or equal to Thp,on.

–For a joint approach of hybrid heat-pump heaters:

(i)the seasonal performance is calculated using a method similar to the one used for heat-pumps alone;

(ii)the hybrid heater is tested at the various temperature and load conditions required for the specific climate and temperature level application; electricity consumption and fuel consumption are registered separately;

(iii)the calculation of ηs,h is based on the interpolation at each bin temperature of the heating capacity and energy input of the hybrid unit between values at the tested part-load conditions.

3.6.Seasonal auxiliary electricity factor in active mode (SAEFon) and seasonal fuel utilisation factor (SFUE) for fuel heat-pump heaters

(a)The seasonal auxiliary electricity factor in active mode (SAEFon) shall be calculated in the following way:

where:

–is frequency of outdoor temperature in the temperature bin j, expressed in hours; 

–Ph(Tj) is the part load for heating, calculated in accordance with point (b);

–AEF(Tj) is the ratio between the part load Ph(Tj) and the electric power input at a specific outdoor temperature Tj, expressed in kW/kW.

(b)The part load for heating Ph(Tj) shall be calculated as follows:

Where:

–Pdesign,h is the design load;

–pl(Tj) is the part load ratio.

(c)The seasonal fuel-utilisation efficiency (SFUE) shall be calculated as follows:

where:

–is frequency of outdoor temperature in the temperature bin j, expressed in hours;

–Ph(Tj) is the part load for heating, calculated in accordance with point (d);

–FUE(Tj) is the ratio between the part load Ph(Tj) and the measured thermal input in GCV at a specific outdoor temperature Tj, expressed in kW/kW;

–Padd(Tj) is the additional heat output required to be supplied by the backup heater, when the fuel heat-pump is not able to supply Ph(Tj) on its own, calculated in accordance with point (d);

–Inputadd(Tj) is the additional energy input consumed by the backup heater, calculated in accordance with point (e).

(d)The additional heat output Padd(Tj) shall be calculated in the following way:

(i)if there is no backup, it is equal to 0;

(ii)for fuel heat pumps with fuel backup heater:

Padd(Tj) = fuelbu(Tj)

(e)The additional final energy input (Inputadd(Tj)) shall be calculated in the following way:

(i)if there is no backup, it is equal to 0;

(ii)for fuel heat pumps with fuel backup heater: 

,

where:

–Psup(Tj) is the bin-specific heat output of the fuel backup heater;

–is the seasonal space-heating efficiency of the fuel backup heater;

–F(1) is the control correction factor defined in Section 5.1.

(f)Declared values for FUEd(Tj) and Pdh(Tj) are the measured values under the part-load test conditions for outdoor temperatures Tj (‘bins’) A to F and Pdesignh, as indicated in Table 3. The values for FUE(Tj) shall be determined through interpolation and extrapolation of known values. If the heat-pump capacity in a bin is too high for the heat demand in the bin by more than 10%, the heat pump will cycle on/off and a degradation factor (Cdh) and a capacity ratio (CR) has to be used to calculate the FUE for Tj in the following way:

where:

–FUE(Tj) is the declared coefficient of performance, calculated in accordance with point (f) above;

–CR is the capacity ratio, calculated in accordance with point (f);

–Cdh is the degradation coefficient for cycling behaviour; either a default value can be used or the degradation coefficient can result from cyclic tests.

In case of cycling, the stationary water temperature regime is modified to maintain the same time-average water-temperature regime over the whole on/off cycle.

(g)The capacity ratio CR for the purposes of point (e) is calculated in the following way:

where: