Bsi bs en 16905 5 2017

Table 4 — Part load conditions of water to-water units and brine to-water units in cooling mode Part load ratio Part load ratio % Outdoor heat exchanger Indoor heat exchanger Coolin

Scope of EN 16905 series

This European Standard outlines the requirements, testing methods, and conditions for evaluating the performance and rating of gas-fired endothermic engine-driven compressors in air conditioners and heat pumps These appliances utilize air, water, or brine as heat transfer media for applications in space heating, cooling, and refrigeration, collectively referred to as "GEHP appliances."

This European Standard only applies to appliances with a maximum heat input (based on net calorific value) not exceeding 70 kW at standard rating conditions

This European Standard only applies to appliances under categories I2H, I2E, I2Er, I2R, I2E(S)B, I2L, I2LL, I2ELL,

I2E(R)B, I2ESi, I2E(R), I3P, I3B, I3B/P, II2H3+, II2Er3+, II2H3B/P, II2L3B/P, II2E3B/P, II2ELL3B/P, II2L3P, II2H3P, II2E3P and II2Er3P according to EN 437

This European Standard is applicable to appliances that feature gas-fired endothermic engines managed by fully automatic control systems, utilize closed system refrigerant circuits without direct contact between the refrigerant and the fluid being cooled or heated, maintain a heat transfer fluid temperature not exceeding 105 °C during normal operation, and adhere to specified maximum operating pressure conditions.

1) heating water circuit (if installed) does not exceed 6 bar,

2) domestic hot water circuit (if installed) does not exceed 10 bar

This European Standard applies to appliances only when used for space heating or space cooling or for refrigeration, with or without heat recovery

The appliances having their condenser cooled by air and by the evaporation of external additional water are not covered by this European Standard

Packaged units, single split and multisplit systems are covered by this European Standard Single duct and double duct units are covered by this European Standard

The above appliances can have one or more primary or secondary functions

This European Standard applies to appliances designed for type testing, while those not intended for type testing will require additional evaluation.

In the case of packaged units (consisting of several parts), this European Standard applies only to those designed and supplied as a complete package

NOTE All the symbols given in this text are used regardless of the language used.

Scope of EN 16905-5

This part of the EN 16905 series specifies the calculation of seasonal performance factor for gas-fired

This document references essential materials that are crucial for its application For references with specific dates, only the cited edition is applicable In the case of undated references, the most recent edition of the referenced document, including any amendments, is relevant.

EN 16905-1, Gas-fired endothermic engine driven heat pumps — Part 1: Terms and definitions

EN 16905-4:2017, Gas-fired endothermic engine driven heat pumps — Part 4: Test methods

For the purposes of this document, the terms and definitions given in EN 16905-1 apply

4 Part load conditions in cooling mode

General

For calculating SGUEc, SAEFc, SEHREgasc, SEHREelecc, and their reference values, it is essential to use the part load ratios based on the formulas in the first column of Tables 1 to 2, rather than the rounded figures in the second column The determination of these values is achieved through linear interpolation of the respective part load values at the specified reference conditions (A, B, C, D).

Air-to-air units

The part load conditions for determining the reference SGUEc (Formula (2)), SAEFc (Formula (4)), SEHREgasc (Formula (7)), SEHREelecc (Formula (8)) are given in the following table:

Table 1 — Part load conditions of air to air units and air-cooled multisplit systems in cooling mode

Part load ratio Part load ratio

Outdoor air dry bulb temperature °C

Indoor air dry bulb (wet bulb) temperatures °C

Water-to-air and brine to air units

Table 2 — Part load conditions of water-to-air and brine-to-air units in cooling mode

Outdoor heat exchanger Indoor heat exchanger

Cooling tower b or water loop application Inlet/outlet water temperatures °C

Ground coupled application (water or brine) Inlet/outlet water temperatures °C

Dry cooler application Inlet/outlet water temperatures °C

Air dry bulb (wet bulb) temperatures °C

The water flow rate is established during the "A" test, and if a cooling tower is sold alongside a water-to-air unit as a matched assembly, it must be tested as an air-to-air unit.

Air-to-water units

For each application, units are evaluated based on whether they permit variations in outlet water temperature in relation to outdoor temperature The variable outlet temperature should only be utilized when the control system effectively regulates the outlet water temperature by taking outdoor temperature into account.

Table 3 — Part load conditions of air-to-water units in cooling mode

Fan coil application Inlet/outlet water temperatures

Cooling floor application Inlet/outlet water temperatures °C

D (20–16)/(Tdesignc-16) 21 20 a/7 a/11,5 a/18 a With the water flow rate as determined during “A” test for units with a fixed water flow rate or with a fixed delta T of 5 K for units with a variable water flow rate.

Water-to-water and brine-to-water units

Table 4 — Part load conditions of water to-water units and brine to-water units in cooling mode

Cooling tower b application Inlet/outlet water temperatures °C

Ground coupled application (water or brine) Inlet/outlet water temperatures °C

Dry cooler application Inlet/outlet water temperatures °C

Fan coil application Inlet/outlet water temperatures

Cooling floor application Inlet/outlet water temperatures °C

During the "A" test, the water flow rate is established for units with a fixed flow rate or a fixed delta T of 5 K for those with a variable flow rate Additionally, if a cooling tower and water-to-air unit are sold as a matched assembly, they must be tested as an air-to-air unit.

5 Part load conditions in heating mode

General

For calculating SGUEh, SAEFh, SEHREgash, SEHREelech, and their reference values, it is essential to use the part load ratios from the first column of Tables 4 to 22, rather than the rounded figures in the second column The values for SGUEh, SAEFh, SEHREgash, SEHREelech, and their references are derived through linear interpolation based on the specified part load conditions: average (A), warmer (W), and colder (C).

The relevant Tdesignh values are defined as follows:

— Tdesign “average” dry bulb temperature conditions at − 10 °C (− 11 °C wet bulb) outdoor temperature and 20 °C indoor temperature;

— Tdesign “colder” dry bulb temperature conditions at − 22 °C (− 23 °C wet bulb) outdoor temperature and 20 °C indoor temperature and the relevant Tbivalent is defined as follows:

— for the average heating season, the dry bulb bivalent temperature is + 2 °C or lower;

— for the colder heating season, the dry bulb bivalent temperature is − 7 °C or lower;

— for the warmer heating season, the dry bulb bivalent temperature is + 7 °C or lower

If the declared TOL is less than the Tdesign h for the specified climate, TOL is considered equal to Tdesign h For Tbivalent and TOL values at or above −7 °C, the wet bulb temperature is defined as the dry bulb temperature minus 1 °C However, for Tbivalent and TOL values below −7 °C, the wet bulb temperature is undefined Under all other part load conditions, the appliance's declared capacity exceeds the building load.

Air-to-air units

The part load conditions for determining the reference SGUEh (Formula (11)), SAEFh (Formula (13)), SEHREgash (Formula (16)), SEHREelech (Formula (17)) are given in the following tables:

Table 5 — Part load conditions of air-to-air units and air-cooled multisplit systems in heating mode for the reference heating season “A” = average

A Outdoor air dry bulb (wet bulb) temperatures °C

Indoor air dry bulb temperature °C

Table 6 — Part load conditions of air-to-air units and air-cooled multisplit systems in heating mode for the reference heating season “W” = warmer

W Outdoor air dry bulb (wet bulb) temperatures °C

Table 7 — Part load conditions of air-to-air units and air-cooled multisplit systems in heating mode for the reference heating season “C” = colder

C Outdoor air dry bulb (wet bulb) temperatures °C

Ga (−15–16)/(Tdesignh-16) 82 −15 20 a Condition G is performed in case TOL is below −20 °C.

Water-to-air units and brine to air units

Table 8 — Part load conditions of water-to-air and brine-to-air units in heating mode for the reference heating season “A” = average

Ground water Brine Indoor air

F (Tbivalent-16)/(Tdesignh-16) 10/a 0/a 20 a The water flow rate as determined at the standard rating conditions

Table 9 — Part load conditions of water-to-air and brine-to-air units in heating mode for the reference heating season “W” = warmer

W Outdoor heat exchanger Indoor heat exchanger

Table 10 — Part load conditions of water-to-air and brine-to-air units in heating mode or the reference heating season “C” = colder

F (Tbivalent-16)/(Tdesignh-16) 10/a 0/a 20 a The water flow rate as determined at the standard rating conditions of fixed capacity heat pumps.

Air-to-water units

General

The part load conditions for determining the reference SGUEh (Formula (11)), SAEFh (Formula (13)), SEHREgash (Formula (16)), SEHREelech (Formula (17)) are given in the following tables.

Low temperature application

Table 11 — Part load conditions of air-to-water units in heating mode, for low temperature application , for the reference heating season “A” = average

A Outdoor heat exchanger b Indoor heat exchanger

Outdoor air Inlet/outlet temperatures

Inlet dry bulb (wet bulb) temperature °C

E (TOL-16)/(Tdesignh-16) TOL a /35 Variable outlet shall be calculated by interpolation or extrapolation from the temperatures which are closest to the TOL a

The calculation of the bivalent temperature (\$T_{bivalent}\$) for a variable outlet is determined through interpolation between the nearest upper and lower temperatures This is based on the water flow rate established under standard rating conditions at 30/35 degrees for units with a fixed water flow rate, and a fixed delta T of 5 K for those with a variable flow rate Additionally, part load tests A - F for exhaust air heat pumps are conducted with outdoor heat exchanger conditions in accordance with EN 16905–4.

To achieve the necessary part load ratio or condition below Tbivalent, units must cycle on and off, and the inlet temperature of the indoor heat exchanger should be set in accordance with EN 16905-4.

Table 12 — Part load conditions of air-to-water units in heating mode, for low temperature application , for the reference heating season “W” = warmer

W Outdoor heat exchanger b Indoor heat exchanger

The variable outlet temperature, denoted as $ T_{bivalent} $, is calculated through interpolation between the upper and lower temperatures nearest to the bivalent temperature This calculation is based on the water flow rate established under standard rating conditions for fixed capacity heat pumps at 30/35 conditions, with a fixed delta T of 5 K for variable flow rate units For exhaust air heat pumps, part load tests A - F are conducted in accordance with EN 16905–4, considering the outdoor heat exchanger conditions It is important to note that this method is not applicable if $ T_{bivalent} $ is equal to or lower than the temperature of condition B.

Table 13 — Part load conditions of air-to-water units in heating mode, for low temperature application , for the reference heating season “C” = colder

C Outdoor heat exchanger b Indoor heat exchanger

E (TOL-16)/(Tdesignh-16) TOL a/35 Variable outlet shall be calculated by interpolation or extrapolation from the temperatures which are closest to the TOL a

F (Tbivalent-16)/(Tdesignh-16) Tbivalent a/35 Variable outlet shall be calculated by interpolation between the upper and lower temperatures which are closest to the bivalent temperature

The water flow rate is established under standard rating conditions for fixed capacity heat pumps at 30/35, with a fixed delta T of 5 K for variable flow rate units Additionally, part load tests A - F for exhaust air heat pumps are conducted in accordance with EN 16905–4, focusing on outdoor heat exchanger conditions.

Medium temperature application

Table 14 — Part load conditions of air-to-water units in heating mode, for medium temperature application , for the reference heating season “A” = average

The variable outlet temperature is determined through interpolation between the upper and lower temperatures nearest to the bivalent temperature For fixed capacity heat pumps operating under standard rating conditions at 40/45, the water flow rate is established, while units with variable flow rates maintain a fixed delta T of 5 K Additionally, part load tests A - F for exhaust air heat pumps are conducted with outdoor heat exchanger conditions in accordance with EN 16905–4.

Table 15 — Part load conditions of air-to-water units in heating mode, for medium temperature application , for the reference heating season “W” = warmer

The calculation of the variable outlet for bivalent systems is determined by interpolating between the upper and lower temperatures nearest to the bivalent temperature This is based on the water flow rate established under standard rating conditions for fixed capacity heat pumps operating at 40/45 conditions, with a fixed delta T of 5 K for variable flow rate units Additionally, for exhaust air heat pumps, part load tests A - F are conducted in accordance with the outdoor heat exchanger conditions specified in EN 16905–4.

For units that need to cycle on and off to achieve the desired part load ratio or condition below the bivalent temperature, it is essential to maintain a fixed inlet temperature for the indoor heat exchanger.

Table 16 — Part load conditions of air-to-water units in heating mode, for medium temperature application , for the reference heating season “C” = colder

Outdoor heat exchanger b Indoor heat exchanger

The water flow rate is established under standard rating conditions for fixed capacity heat pumps at 40/45 degrees, maintaining a fixed delta T of 5 K for variable flow rate units Additionally, part load tests A – F for exhaust air heat pumps are conducted with outdoor heat exchanger conditions in accordance with EN 16905–4.

For units operating in a cycling mode to achieve the desired part load ratio or condition below the Tbivalent, it is essential to maintain a consistent inlet temperature for the indoor heat exchanger.

High temperature application

Table 17 — Part load conditions of air-to-water units in heating mode, for high temperature application , for the reference heating season “A” = average

The variable outlet temperature, denoted as $ T_{bivalent} $, is calculated through interpolation between the upper and lower temperatures nearest to the bivalent temperature This calculation is based on the water flow rate established under standard rating conditions for fixed capacity heat pumps at 47/55 conditions, with a fixed delta T of 8 K for variable flow rate units Additionally, part load tests A – F for exhaust air heat pumps are conducted in accordance with the outdoor heat exchanger conditions specified in EN 16905–4.

Table 18 — Part load conditions of air-to-water units in heating mode, for high temperature application , for the reference heating season “W” = warmer

The variable outlet temperature, denoted as $ Tbivalent $, is calculated through interpolation between the upper and lower temperatures nearest to the bivalent temperature This calculation is based on the water flow rate established under standard rating conditions for fixed capacity heat pumps at 47/55 conditions, with a fixed delta T of 8 K for variable flow rate units Additionally, part load tests A – F for exhaust air heat pumps are conducted with an outdoor heat exchanger condition in accordance with EN 16905–4.

For units that need to cycle on and off to achieve the desired part load ratio or condition below the Tbivalent, it is essential to maintain a fixed inlet temperature for the indoor heat exchanger.

Table 19 — Part load conditions of air-to-water units in heating mode, for high temperature application , for the reference heating season “C” = colder

C Outdoor heat exchanger b Indoor heat exchanger

The water flow rate is established under standard rating conditions for fixed capacity heat pumps at 47/55 degrees, maintaining a fixed delta T of 8 K for variable flow rate units Additionally, part load tests A - F for exhaust air heat pumps are conducted with outdoor heat exchanger conditions in accordance with EN 16905–4.

Water-to-water and brine-to-water units

General

Low temperature application

Table 20 — Part load conditions of water/brine-to-water units in heating mode, for low temperature application , for the reference heating season “A” = average

A Outdoor heat exchanger Indoor heat exchanger

Ground water Brine Inlet/outlet temperatures

The variable outlet shall be calculated through interpolation between the upper and lower temperatures nearest to the bivalent temperature This calculation is based on the water/brine flow rate determined under standard rating conditions for fixed capacity heat pumps at 30/35 conditions For units with a fixed water flow rate, the water flow rate is also determined under these standard conditions, maintaining a fixed delta T of 5 K for units with variable flow rates.

Table 21 — Part load conditions of water/brine-to-water units in heating mode, for low temperature application , for the reference heating season “W” = warmer

The variable outlet, denoted as F, will be calculated through interpolation between the upper and lower temperatures nearest to the bivalent temperature This calculation considers the water/brine flow rate established under standard rating conditions for fixed capacity heat pumps operating at 30/35 conditions For units with a fixed water flow rate, the water flow rate is determined under the same standard conditions, while units with a variable flow rate utilize a fixed delta T of 5 K.

Table 22 — Part load conditions of water/brine-to-water units in heating mode, for low temperature application , for the reference heating season “C” = colder

C Outdoor heat exchanger Indoor heat exchanger

The variable outlet, denoted as F, will be calculated through interpolation between the upper and lower temperatures nearest to the bivalent temperature This calculation utilizes the water/brine flow rate established under standard rating conditions for fixed capacity heat pumps operating at 30/35 conditions For units with a fixed water flow rate, the water flow rate is determined under the same standard conditions, while units with a variable flow rate will use a fixed delta T of 5 K.

For units that need to cycle on and off to achieve the desired part load ratio or condition below the Tbivalent, it is essential to maintain a fixed inlet temperature for the indoor heat exchanger.

Medium temperature application

Table 23 — Part load conditions of water/brine-to-water units in heating mode, for medium temperature application , for the reference heating season “A” = average

The variable outlet, denoted as F, will be calculated through interpolation between the upper and lower temperatures nearest to the bivalent temperature This calculation is based on the water/brine flow rate established under standard rating conditions for fixed capacity heat pumps operating at 40/45 conditions For units with a fixed water flow rate, the water flow rate is also determined under these standard conditions, maintaining a fixed delta T of 5 K.

Table 24 — Part load conditions of water/brine-to-water units in heating mode, for medium temperature application, for the reference heating season “W” = warmer

The variable outlet, denoted as F, shall be calculated through interpolation between the upper and lower temperatures closest to the bivalent temperature This calculation is based on the water/brine flow rate determined under standard rating conditions for fixed capacity heat pumps operating at 40/45 conditions For units with a fixed water flow rate, the water flow rate is also determined under these standard conditions, while units with a variable flow rate will use a fixed delta T of 5 K.

Table 25 — Part load conditions of water/brine-to-water units in heating mode, for medium temperature application , for the reference heating season “C” = colder

The variable outlet for the calculation of the bivalent temperature shall be determined through interpolation between the nearest upper and lower temperatures This calculation is based on the water/brine flow rate established under standard rating conditions for fixed capacity heat pumps operating at 40/45 conditions For units with a fixed water flow rate, the water flow rate is also determined under these standard conditions, while units with a variable flow rate will use a fixed delta T of 5 K.

For units operating in a cycling mode to achieve the necessary part load ratio or conditions below the bivalent temperature, it is essential to set the inlet temperature of the indoor heat exchanger in accordance with EN 16905-4 standards.

High temperature application

Table 26 — Part load conditions of water/brine-to-water units in heating mode, for high temperature application , for the reference heating season “A” = average

The variable outlet, denoted as F, will be calculated through interpolation between the upper and lower temperatures closest to the bivalent temperature This calculation is based on the water/brine flow rate established under standard rating conditions for fixed capacity heat pumps at 47/55 conditions For units with a fixed water flow rate, the water flow rate is also determined under these standard conditions, while units with a variable flow rate will use a fixed delta T of 8 K.

For units that need to cycle on and off to achieve the desired part load ratio or condition below the bivalent temperature, it is essential to maintain a fixed inlet temperature for the indoor heat exchanger.

Table 27 — Part load conditions of water/brine-to-water units in heating mode, for high temperature application , for the reference heating season “W” = warmer

The variable outlet, denoted as F, will be calculated through interpolation between the upper and lower temperatures closest to the bivalent temperature This calculation utilizes the water/brine flow rate established under standard rating conditions for fixed capacity heat pumps at 47/55 conditions For units with a fixed water flow rate, the water flow rate is determined at the same standard conditions, while units with a variable flow rate operate with a fixed delta T of 8 K.

To achieve the necessary part load ratio or condition below Tbivalent, units that cycle on and off must have the inlet temperature of the indoor heat exchanger set in accordance with EN 16905-4.

Table 28 — Part load conditions of water/brine-to-water units in heating mode, for high temperature application , for the reference heating season “C” = colder

The variable outlet, denoted as F, will be calculated through interpolation between the upper and lower temperatures nearest to the bivalent temperature This calculation utilizes the water/brine flow rate established under standard rating conditions for fixed capacity heat pumps at 47/55 conditions For units with a fixed water flow rate, the water flow rate is also determined under these standard conditions, while units with a variable flow rate will use a fixed delta T of 8 K.

For units that need to cycle on and off to achieve the desired part load ratio or condition below the Tbivalent, the indoor heat exchanger's inlet temperature must be set in accordance with EN 16905-4.

6 Calculation methods for reference SPERc

General

The seasonal performance calculation utilizes the bin method, determining the part load GUEc, AEFc, EHREgasc, and EHREelecc at each bin temperature through linear interpolation of the corresponding part load values at reference conditions A, B, C, and D.

The part load conditions A, B, C, D provide the part load ratios and the temperature test conditions at four reference outdoor air dry bulb temperatures: 35 °C, 30 °C, 25 °C and 20 °C.

General formula for calculation of GUE c and AEF c

The calculation of the reference GUEc that applies to all types of units is given by the formula included in

The calculation of the reference AEFc that applies to all types of units is given by the formula included in

General formula for calculation of EHREgas c and EHREelec c

The calculation of the reference EHREgasc that applies to all types of units is given by the formula included in EN 16905-4:2017, 4.2.7

The calculation of the reference EHRelecc that applies to all types of units is given by the formula included in EN 16905-4:2017, 4.2.7.

General formula for calculation of reference SGUE c

The calculation of the reference SGUEc that applies to all types of units is given by the following Formula (2):

SGUE Pc Tj hj GUEc Tj

Tj is the bin temperature; j is the bin number; n is the number of bins;

Pc(Tj) is the cooling load of the building for the corresponding temperature Tj; hj is the number of bin hours occurring at the corresponding temperature Tj;

GUEc PL (Tj) is the part load GUEc values of the appliance for the corresponding temperature Tj

Table 29 — Bin number j, outdoor temperature Tj in °C and number of hours per bin hj corresponding to the reference cooling season j 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

The GUEcPL values at each bin are determined via interpolation of the GUEc values at part load conditions A, B, C and D as defined in 6.1

For part load conditions above part load condition A, the same GUEc values as for condition A shall be used

For part load conditions below part load condition D, the same GUEc values as for condition D shall be used.

Calculation of reference SAEF c

The calculation of the reference SAEFc that applies to all types of appliances is given by reference annual cooling demand divided by the annual electricity consumption

The annual electricity consumption includes the power consumption during active mode, thermostat off mode, standby mode and off mode:

TO TO SB SB CK CK OFF OFF cON

Q ref,c is the reference annual cooling demand, expressed in kWh, as defined in 6.6;

SAEF cON is the seasonal auxiliary energy factor in cooling mode and active mode, as defined in 6.7;

The terms H TO, H SB, H CK, and H OFF represent the hours an appliance operates in thermostat off mode, standby mode, crankcase heater mode, and off mode, respectively For cooling usage, refer to the hours specified in Annex A.

Electricity consumption is measured in kilowatts (kW) for various modes: P TO for thermostat off mode, P SB for standby mode, P CK for crank case heater mode, and P OFF for off mode These measurements must adhere to the standards set by EN 16905–4.

Calculation of reference annual cooling demand (Q ref,c )

The reference annual cooling demand, measured in kWh, is determined by multiplying the design cooling load (Pdesignc) by the number of equivalent cooling hours (Hec).

(5) The number of equivalent cooling hours (Hec) can be found in Annex A.

Calculation of reference SAEF cON

The reference SAEFcON is determined as follows:

SAEF P Tj hj AEF Tj

Tj is the bin temperature; j is the bin number; n is the amount of bins;

P c (Tj) is the cooling demand of the building for the corresponding temperature Tj; hj is the number of bin hours occurring at the corresponding temperature Tj;

AEF CPL (Tj) is the AEFc values of the appliance for the corresponding temperature Tj

The values to be used for j, Tj and hj are determined in Table 29 The cooling load PC (Tj) shall be determined according to Formula (3)

The AEFcPL values at each bin are determined via interpolation of the AEFc values at part load conditions

For part load conditions above part load condition A, the same AEFc values as for condition A shall be used

For part load conditions below part load condition D, the same AEFc values as for condition D shall be used.

Calculation of reference SEHREgas c

The calculation of the reference SEHREgasc that applies to all types of units is given by the following Formula (7):

1 1 n j c c n c j cPL hjP Tj SEHREgas hj P Tj EHREgas Tj

Tj is the bin temperature;

The values to be used for j, Tj and hj are determined in Table 29

The EHREgascPL values at each bin are determined via interpolation of the EHREgasc values at part load conditions A, B, C and D as defined in 6.1

For part load conditions above part load condition A, the same EHREgasc values as for condition A shall be used

For part load conditions below part load condition D, the same EHREgasc values as for condition D shall be used.

Calculation of reference SEHREelec c

The calculation of the reference SEHREelecc that applies to all types of units is given by the following Formula (8):

1 1 n j c c n c j cPL hjP Tj SEHREelec hj P Tj EHREelec Tj

P c (Tj) is the cooling load of the building for the corresponding temperature Tj; hj is the number of bin hours occurring at the corresponding temperature Tj;

EHREelec cPL (Tj) is the part load EHREelecc values of the appliance for the corresponding temperature Tj

The EHREeleccPL values at each bin are determined via interpolation of the EHREelecc values at part load conditions A, B, C and D as defined in 6.1

For part load conditions above part load condition A, the same EHREelecc values as for condition A shall be used

For part load conditions below part load condition D, the same EHREelecc values as for condition D shall be used

6.10Procedures for the determination of GUE cPL / AEF cPL values

In part load condition A (full load), the declared capacity of an appliance is considered equal to the cooling load (Pdesignc) Accordingly, the GUEcDC / AEFcDC shall be used

In part load conditions B, C, D, the test methods at part load shall be used in order to measure GUEcPL / AEFcPL, as defined in EN 16905-4

In part load conditions B, C, D, the test methods at part load shall be used in order to measure EHREgascPL / EHREeleccPL as defined in EN 16905-4

The seasonal primary energy ratio SPERc is determined according to Formula (9):

SPER Prim Prim Prim Prim

Prim gas is the primary energy factor for gas, value based on ErP Directive (2009/125/EC) or by default equal to 1 on GCV;

Prim elec is the primary energy factor for electricity, value based on ErP Directive

(2009/125/EC) or by default equal to 2,5;

SGUE c is the seasonal gas utilization efficiency in cooling mode, as defined in 6.4;

SAEF c is the seasonal auxiliary energy factor in cooling mode, as defined in 6.5;

SEHREgas c is the seasonal engine heat recovery efficiency gas in cooling mode as defined in 6.8

SEHREelec c is the seasonal engine heat recovery efficiency electricity in cooling mode as defined in

7 Calculation methods for reference SPER h

The seasonal performance calculation utilizes the bin method, determining part load values such as GUEh, AEFh, EHREgash, and EHREelech at each bin temperature through linear interpolation of the corresponding part load values at reference conditions A, B, C, D, and occasionally E and F.

The part load conditions A, B, C, D, E and F provide the part load ratios and the temperature test conditions at six reference outdoor air dry bulb temperatures: − 7 °C, 2 °C, 7 °C, 12 °C, TOL and Tbivalent

The part load ratio corresponding to a given outdoor temperature is defined according to Formula (10):

7.2General formula for calculation of GUE h and AEF h

The calculation of the reference GUEh that applies to all types of units is given by the formula included

The calculation of the reference EHREelech that applies to all types of units is given by the formula included into EN 16905-4:2017, 4.2.7

7.4General formula for calculation of reference SGUE h

The calculation of the reference SGUEh that applies to all types of units is given by the following Formula (11):

SGUE Ph Tj hj GUE Tj

Ph(Tj) is the heating load of the building for the corresponding temperature Tj; hj is the number of bin hours occurring at the corresponding temperature Tj;

GUE hPL (Tj) is the part load GUEh values of the appliance for the corresponding temperature

Table 30 — Bin number j, outdoor temperature Tj in °C and number of hours per bin hj corresponding to the reference heating season “warmer”, “average”, “colder”

Warmer (W) Average (A) Colder (C) j Tj hj W hj A hj C °C h h h

The heating load Ph(Tj) can be determined by multiplying the full load value (Pdesignh) with the part load ratio PLRh(Tj) of each corresponding bin

Ph Tj =Pdesign PLR Tj×

In Formula (12) above, the part load ratio PLRh(Tj) is defined according to Formula (10), i.e

— for the average climate: (Tj-16) / (−10-16);

— for the warmer climate: (Tj-16) / (+2-16);

— for the colder climate: (Tj-16) / (−22-16)

The GUEhPL and capacity values for each bin are calculated through interpolation of the GUEh and capacity values at various part load conditions, specifically A, B, C, D, and occasionally E and F This interpolation process utilizes the GUEh and capacities from the two nearest part load conditions.

The GUEhPL and values and capacity values for part load conditions above D are extrapolated from the GUEh and values and capacity values at part load conditions C and D.

Calculation of reference SAEF h

The calculation of the reference SAEFh that applies to all types of appliances is given by reference annual heating demand divided by the annual electricity consumption

The annual electricity consumption includes the power consumption during active mode, thermostat off mode, standby mode and off mode:

TO TO SB SB CK CK OFF OFF hON

Q ref,h is the reference annual heating demand, expressed in kWh, as defined in 7.6;

SAEF hON is the seasonal auxiliary energy factor in heating mode and active mode, as defined in 7.7;

The hours an appliance operates in various modes are defined as follows: H TO represents the duration in thermostat off mode, H SB indicates standby mode, H CK refers to crankcase heater operation, and H OFF denotes the off mode For cooling usage, the specific number of hours is detailed in Annex A.

P TO , P SB , P OFF are the electricity consumption during respectively thermostat off mode, standby mode and off mode, expressed in kW The measurement of PTO, PSB,

POFF shall be made according to EN 16905–4.

Calculation of reference annual heating demand (Q refh )

The reference annual heating demand is expressed in kWh and can be calculated as the design heating load (Pdesignh) multiplied by the number of equivalent heating hours (Heh):

Calculation of reference SAEF hON

The reference SAEFhON is determined as follows:

SAEF P Tj hj AEF Tj

Tj is the bin temperature; j is the bin number; n is the amount of bins;

Ph(Tj) is the heating demand of the building for the corresponding temperature Tj; hj is the number of bin hours occurring at the corresponding temperature Tj;

AEF hPL (Tj) is the AEFh values of the appliance for the corresponding temperature Tj

The heating load Ph(Tj) can be determined according to Formula (12)

The AEFhPL and capacity values for each bin are calculated through interpolation between the values at the nearest part load conditions, specifically A, B, C, D, and occasionally E and F This method ensures accurate estimation by utilizing the two closest part load conditions for interpolation.

The AEFhPL values and capacity values for part load conditions above D are extrapolated from the AEFhPL values and capacity values at part load conditions C and D.

Calculation of reference SEHREgas h

The calculation of the reference SEHREgash that applies to all types of units is given by the following Formula (16):

Ph Tj hj EHREgash Tj

Tj is the bin temperature; j is the bin number;

The EHREgashPL values at each bin are determined via interpolation of the EHREgash values at part load conditions A, B, C and D as defined in 7.1

The EHREgashPL and capacity values for each bin are calculated through interpolation based on part load conditions A, B, C, D, and occasionally E and F This interpolation process utilizes the EHREgashPL and capacity values from the two nearest part load conditions.

The EHREgashPL values and capacity values for part load conditions above D are extrapolated from the EHREgashPL values and capacity values at part load conditions C and D.

Calculation of reference SEHREelec h

The calculation of the reference SEHREelech that applies to all types of units is given by the following Formula (17):

Ph Tj hj EHREelec Tj

P h (Tj) is the heating load of the building for the corresponding temperature Tj; hj is the number of bin hours occurring at the corresponding temperature Tj;

EHREelec hPL (Tj) is the part load EHREelech values of the appliance for the corresponding temperature Tj

The EHREelechPL values at each bin are determined via interpolation of the EHREelech values at part load conditions A, B, C and D as defined in 7.1

The EHREelechPL and capacity values for each bin are calculated through interpolation based on part load conditions A, B, C, D, and occasionally E and F This interpolation process utilizes the EHREelechPL and capacity values from the two nearest part load conditions.

The EHREelechPL values and capacity values for part load conditions above D are extrapolated from the EHREelechPL values and capacity values at part load conditions C and D.

Procedures for the determination of GUE hPL / AEF hPL values

In part load condition A (full load), the declared capacity of an appliance is considered equal to the heating load (Pdesignh) Accordingly, the GUEhDC / AEFhDC shall be used

In part load conditions B, C, D, the test methods at part load shall be used in order to measure GUEhPL /

In part load conditions B, C, D, the test methods at part load shall be used in order to measure SEHREgashPL / SEHREelechPL as defined in EN 16905-4

The seasonal primary energy ratio SPERh is determined according to Formula (18):

SGUE h is the seasonal gas utilization efficiency in heating mode, as defined in 7.4;

SAEF h is the seasonal auxiliary energy factor in heating mode, as defined in 7.5;

SEHREgas h is the seasonal engine heat recovery efficiency gas in heating mode as defined in 7.8;

SEHREelec h is the seasonal engine heat recovery efficiency electricity in heating mode as defined in

Determination of reference annual cooling/heating demands and determination of hours for active mode, thermostat off, standby, off mode and crankcase heater mode for reference SAEF c and SAEF h calculation

Table A.1 — Number of hours used for calculation of reference SAEF c

C Hours for the reference cooling season, of which: 3672

F Difference (C-D-E) = Active mode hours without setback correction 1309

H Difference (F-G) = (or F x 73 %) = Active mode hours corrected for setback impact 954

I Equivalent active hours for cooling (H ec ) 350

Table A.2 — Number of hours used for calculation of reference SAEF h

Equivalent active for heating (H EH ) 1400 1400 2100

Table A.3 — Crankcase heather mode hours used for calculation of reference SAEF c

Table A.4 — Crankcase heather mode hours used for calculation of reference SAEF h

Calculation example for reference SGUE c , SAEF c , SEHREgas c , SEHREelec c and

For an air to air appliance the following design parameters are given:

— Declared capacity at Tdesign (35 C) = 50 kW

The outdoor temperature, partial load ratio, and indoor air temperature can be determined from Table 1 in section 4.2 The cooling load is calculated using Formula (4) Additionally, GUEc and AEFc are established through testing in accordance with EN 16905-4, as referenced in Table B.1, while EHREgasc and EHREelecc are also determined by tests following the same standard.

Table B.1 — Data for GUE c and AEF c and EHREgas c and EHREelec c

Cooling Load kW GUE c EHREgas c AEF c EHREelec c

The bin calculation is detailed in Table B.2, with columns (A), (B), and (C) sourced from Table 29 The cooling load (D) for each bin is determined using Formula (3) GUEc (E) and AEFc (G) are calculated as per section 6.2 The cooling demand (I) is computed as \$I = fon \times C \times D\$, while the gas energy input (H) is derived from \$H = G / E\$, and the electricity input (K) is given by \$K = I / F\$ Additionally, SGUEc, SAEFcON SEHREgasc, and SEHREelecc can be obtained from the total values (M), (N), (O), and (P).

The measured power consumptions in thermostat off, stand by, crank case and off mode are respectively 0,03 kW, 0,03 kW, 0,05 kW and 0,01 kW

Finally SAEFc is calculated according to Formula (4)

SAEFc = 17 500 kWh / (17 500 kWh / 27,10 + 221 h x 0,03 kW + 2142 h x 0,03 kW + 2672 h x 0,05 kW +

Finally SPERc is calculated according to Formula (9):

Table B.2 — Bin calculation of cooling load

Bin Outdoor temp °C air hours Bin hj

Pc(Tj) kW GUE c kW/kW AEF c kW/kW EHREgas c kW/kW EHREelec c kW/kW

Cooling demand kWh energy Gas input kWh

Energy recovery from engine (Qhr) kWh

Calculation example for reference SGUE h , SAEF h , SEHREgas h , SEHREelec h and

— Declared capacity at Tdesign (−10° C) = 50 kW

The outdoor temperature, partial load ratio, and indoor air temperature can be determined from Table 5 in section 5.2 The heating load is calculated using Formula (12), while GUEh and AEFh are established through testing in accordance with EN 16905-4 Additionally, EHREgash and EHREelech are also determined by tests following the same standard, as detailed in Table C.1.

Table C.1 — Data for GUE h and AEF h and EHREgas h and EHREelec h

Outdoor air dry bulb (wet bulb) temperatures °C

Indoor air dry bulb temperatures °C

Heating Load kW GUE h EHREgas h AEF h EHREelec h

The bin calculation is shown in Table C.2 The columns (A), (B), (C) are derived from Table 30 For each

The reference annual heating demand Qref,h is calculated according to Formula (14)

Finally SAEFh is calculated according to Formula (13)

SAEFh = 70 000 kWh / (70 000 kWh / 26,27 + 0 h x 0,03 kW + 179 h x 0,03 kW + 179 h x 0,05 kW + 0 h x 0,01 kW) = 26,17

Finally SPERh is calculated according to Formula (19):

Table C.2 — Bin calculation of heating load

Ph(Tj) kW GUE h kW/kW AEF h kW/kW EHREgas h kW/kW EHREelec h kW/kW

Heating demand kWh energy Gas input kWh

Adaption of water temperature for fixed capacity

For the adaptation of water temperature for fixed capacity, refer to EN 14825:2016, Annex D

Compensation method for air to water and water to water units

For the compensation method for air to water and water to water units, refer to EN 14825:2016, Annex F

Relationship between this European Standard and the ecodesign requirements of Commission Regulation (EU) No 813/2013 aimed to be covered

This European Standard was developed in response to the Commission's standardization request “M/535” to offer a voluntary method for meeting the ecodesign requirements outlined in Commission Regulation (EU) No 813/2013, which implements Directive 2005/32/EC and 2009/125/EC concerning ecodesign standards for space heaters and combination heaters.

Citing this standard in the Official Journal of the European Union establishes compliance with the normative clauses outlined in Table ZA.1 This compliance, within the standard's scope, provides a presumption of conformity with the relevant ecodesign requirements of the Regulation and associated EFTA regulations.

Table ZA.1 outlines the relationship between the European Standard and Commission Regulation (EU) No 813/2013, which was enacted on August 2, 2013 This regulation implements Directive 2009/125/EC from the European Parliament and Council, focusing on ecodesign requirements for space heaters and combination heaters, as well as the Commission's standardization request M/535.

Clause(s)/subclause(s) of this EN Remarks/Notes

Annex II.1 (a) and (b) Not applicable

Annex II.5 (a), (b) and (c) Not applicable

Annex II.1 Table 1 Not applicable

Annex III Table 3 Not applicable

The presumption of conformity is only valid while the reference to this European Standard is included in the list published in the Official Journal of the European Union It is essential for users of this standard to regularly check the latest list in the Official Journal to ensure compliance.

WARNING 2 — Other Union legislation may be applicable to the products falling within the scope of this standard

Relationship between this European Standard and the energy labelling requirements of Commission Delegated Regulation (EU) No 811/2013 aimed to be covered

This European Standard was developed in response to the Commission's standardization request “M/535” to offer a voluntary method for meeting the energy labelling requirements outlined in Commission Delegated Regulation (EC) No 811/2013, dated 18 February 2013 This regulation supplements Directive 2010/30/EU from the European Parliament and Council, specifically addressing energy labelling for space heaters and combination heaters.

Citing this standard in the Official Journal of the European Union establishes compliance with the normative clauses outlined in Table ZB.1 This compliance, within the standard's scope, provides a presumption of conformity with the relevant energy labeling requirements of the Regulation and associated EFTA regulations.

Table ZB.1 outlines the relationship between the European Standard and Commission Delegated Regulation (EU) No 811/2013, which supplements Directive 2010/30/EU concerning energy labeling for space heaters and combination heaters, as well as the Commission's standardization request M/535.

Article 3, 1(a), Annex II, 1 6,7 Energy efficiency classes

Article 3, 1(a), Annex II, 2 Not applicable Water heating energy classes Article 3, 1(a), Annex III and IV Not applicable Sound power level

Article 3, 1(a), Annex III,1.1 and Annex III, 3 Not applicable Tests conditions for measuring the rated heat output to be inserted in the Energy label for space heater

The article outlines the requirements for space heaters and combination heaters, specifying that Annex IV, section 5, does not apply to the test conditions for data to be included in the product fiche for space heaters Additionally, Article 3, section 1(c), and Annex IV, section 1, indicate that technical documentation for space heaters is not applicable For combination heaters, Article 3, section 2(a), along with Annex III, sections 2.1 and 4, mandates the inclusion of an energy label, while Article 3, section 2(b), and Annex IV, sections 2 and 6, require a product fiche.

WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European

The standard is upheld in the list published in the Official Journal of the European Union It is essential for users of this standard to regularly check the most recent list available in the Official Journal of the European Union.

[1] EN 437, Test gases — Test pressures — Appliance categories

[2] EN 12309-1, Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 1: Terms and definitions

[3] EN 12309-2, Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 2: Safety

[4] EN 12309-3, Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 3: Test conditions

[5] EN 12309-4, Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 4: Test methods

[6] EN 12309-5, Gas-fired sorption appliances for heating and/or cooling with a net heat input not exceeding 70 kW - Part 5: Requirements

[7] EN 14511-1, Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling - Part 1: Terms, definitions and classification

[8] EN 14511-2, Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling - Part 2: Test conditions

[9] EN 14511-3, Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling - Part 3: Test methods

[10] EN 14511-4, Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling - Part 4: Operating requirements, marking and instructions

The EN 14825:2016 standard outlines the testing and rating procedures for air conditioners, liquid chilling packages, and heat pumps equipped with electrically driven compressors, specifically focusing on their performance under part load conditions This standard is essential for calculating the seasonal performance of these systems in both heating and cooling applications.

[12] prEN 16905-2 2 , Gas-fired endothermic engine driven heat pumps — Part 2: Safety

[13] EN 16905-3, Gas-fired endothermic engine driven heat pumps — Part 3: Test conditions

Calculation of reference SPER h

The seasonal primary energy ratio SPERh is determined according to Formula (18):

SGUE h is the seasonal gas utilization efficiency in heating mode, as defined in 7.4;

SAEF h is the seasonal auxiliary energy factor in heating mode, as defined in 7.5;

SEHREgas h is the seasonal engine heat recovery efficiency gas in heating mode as defined in 7.8;

SEHREelec h is the seasonal engine heat recovery efficiency electricity in heating mode as defined in

Determination of reference annual cooling/heating demands and determination of hours for active mode, thermostat off, standby, off mode and crankcase heater mode for reference SAEF c and SAEF h calculation

Table A.1 — Number of hours used for calculation of reference SAEF c

C Hours for the reference cooling season, of which: 3672

F Difference (C-D-E) = Active mode hours without setback correction 1309

H Difference (F-G) = (or F x 73 %) = Active mode hours corrected for setback impact 954

I Equivalent active hours for cooling (H ec ) 350

Table A.2 — Number of hours used for calculation of reference SAEF h

Equivalent active for heating (H EH ) 1400 1400 2100

Table A.3 — Crankcase heather mode hours used for calculation of reference SAEF c

Table A.4 — Crankcase heather mode hours used for calculation of reference SAEF h

Calculation example for reference SGUE c , SAEF c , SEHREgas c , SEHREelec c and

— Declared capacity at Tdesign (35 C) = 50 kW

The outdoor temperature, partial load ratio, and indoor air temperature can be determined from Table 1 in section 4.2 The cooling load is calculated using Formula (4) Additionally, GUEc and AEFc are established through testing in accordance with EN 16905-4, as referenced in Table B.1, while EHREgasc and EHREelecc are also determined by tests following the same standard.

Table B.1 — Data for GUE c and AEF c and EHREgas c and EHREelec c

Cooling Load kW GUE c EHREgas c AEF c EHREelec c

The bin calculation is detailed in Table B.2, with columns (A), (B), and (C) sourced from Table 29 The cooling load (D) for each bin is determined using Formula (3) Values for GUEc (E) and AEFc (G) are calculated as per section 6.2 The cooling demand (I) is computed as \$I = fon \times (C) \times (D)\$, while the gas energy input (H) is derived from \$H = (G) / (E)\$, and the electricity input (K) is calculated using \$K = (I) / (F)\$ Additionally, SGUEc, SAEFcON SEHREgasc, and SEHREelecc can be obtained from the total values (M), (N), (O), and (P).

Finally SAEFc is calculated according to Formula (4)

SAEFc = 17 500 kWh / (17 500 kWh / 27,10 + 221 h x 0,03 kW + 2142 h x 0,03 kW + 2672 h x 0,05 kW +

Finally SPERc is calculated according to Formula (9):

Table B.2 — Bin calculation of cooling load

Pc(Tj) kW GUE c kW/kW AEF c kW/kW EHREgas c kW/kW EHREelec c kW/kW

Cooling demand kWh energy Gas input kWh

Calculation example for reference SGUE h , SAEF h , SEHREgas h , SEHREelec h and

— Declared capacity at Tdesign (−10° C) = 50 kW

The outdoor temperature, partial load ratio, and indoor air temperature can be determined from Table 5 in section 5.2 The heating load is calculated using Formula (12), while GUEh and AEFh are established through testing in accordance with EN 16905-4 Additionally, EHREgash and EHREelech are also determined by tests following the same standard, as detailed in Table C.1.

Table C.1 — Data for GUE h and AEF h and EHREgas h and EHREelec h

Outdoor air dry bulb (wet bulb) temperatures °C

Indoor air dry bulb temperatures °C

Heating Load kW GUE h EHREgas h AEF h EHREelec h

The bin calculation is shown in Table C.2 The columns (A), (B), (C) are derived from Table 30 For each

The reference annual heating demand Qref,h is calculated according to Formula (14)

Finally SAEFh is calculated according to Formula (13)

SAEFh = 70 000 kWh / (70 000 kWh / 26,27 + 0 h x 0,03 kW + 179 h x 0,03 kW + 179 h x 0,05 kW + 0 h x 0,01 kW) = 26,17

Finally SPERh is calculated according to Formula (19):

Table C.2 — Bin calculation of heating load

Ph(Tj) kW GUE h kW/kW AEF h kW/kW EHREgas h kW/kW EHREelec h kW/kW

Heating demand kWh energy Gas input kWh

Adaption of water temperature for fixed capacity

For the adaptation of water temperature for fixed capacity, refer to EN 14825:2016, Annex D

Compensation method for air to water and water to water units

For the compensation method for air to water and water to water units, refer to EN 14825:2016, Annex F

Relationship between this European Standard and the ecodesign requirements of Commission Regulation (EU) No 813/2013 aimed to be covered

This European Standard was developed in response to the Commission's standardization request “M/535” to offer a voluntary method for meeting the ecodesign requirements outlined in Commission Regulation (EU) No 813/2013, which implements Directive 2005/32/EC and 2009/125/EC concerning ecodesign standards for space heaters and combination heaters.

Citing this standard in the Official Journal of the European Union establishes compliance with the normative clauses outlined in Table ZA.1 This compliance, within the standard's scope, provides a presumption of conformity with the relevant ecodesign requirements of the Regulation and related EFTA regulations.

Table ZA.1 outlines the relationship between the European Standard and Commission Regulation (EU) No 813/2013, which was enacted on August 2, 2013 This regulation implements Directive 2009/125/EC from the European Parliament and Council, focusing on ecodesign requirements for space heaters and combination heaters, as well as the Commission's standardization request M/535.

Annex II.5 (a), (b) and (c) Not applicable

The presumption of conformity remains valid only while the reference to this European Standard is included in the list published in the Official Journal of the European Union It is essential for users of this standard to regularly check the latest list in the Official Journal to ensure compliance.

Relationship between this European Standard and the energy labelling requirements of Commission Delegated Regulation (EU) No 811/2013 aimed to be covered

This European Standard was developed in response to the Commission's standardization request “M/535” to offer a voluntary method for meeting the energy labeling requirements outlined in Commission Delegated Regulation (EC) No 811/2013, dated 18 February 2013 This regulation supplements Directive 2010/30/EU from the European Parliament and Council, specifically addressing energy labeling for space heaters and combination heaters.

Citing this standard in the Official Journal of the European Union establishes compliance with the normative clauses outlined in Table ZB.1 This compliance, within the standard's scope, provides a presumption of conformity with the relevant energy labeling requirements of the Regulation and associated EFTA regulations.

Table ZB.1 outlines the relationship between the European Standard and Commission Delegated Regulation (EU) No 811/2013, which supplements Directive 2010/30/EU concerning energy labeling for space heaters and combination heaters, as well as the Commission's standardization request M/535.

Article 3, 1(a), Annex II, 1 6,7 Energy efficiency classes

Article 3, 1(a), Annex II, 2 Not applicable Water heating energy classes Article 3, 1(a), Annex III and IV Not applicable Sound power level

Article 3, 1(a), Annex III,1.1 and Annex III, 3 Not applicable Tests conditions for measuring the rated heat output to be inserted in the Energy label for space heater

The article outlines the requirements for space heaters and combination heaters, specifying that Annex IV, section 5, does not apply to the test conditions for data to be included in the product fiche for space heaters Additionally, Article 3, section 1(c), and Annex IV, section 1, indicate that technical documentation for space heaters is not applicable For combination heaters, Article 3, section 2(a), along with Annex III, sections 2.1 and 4, addresses the energy label requirements, while Article 3, section 2(b), and Annex IV, sections 2 and 6, pertain to the product fiche specifications.

WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European

The standard is upheld in the list published in the Official Journal of the European Union Users are encouraged to regularly check the most recent list available in the Official Journal to stay updated.