The energy efficiency of our heat pumps

MasterTherm Heat Pumps are one of the most economical and efficient systems available

From September 2015, heat pumps must be equipped with an energy label. The energy label is used to classify individual heat pumps according to their energy efficiency (heating efficiency). The highest rating is class A ++ , the lowest class G. The defining factor for determining energy efficiency is the eco-efficiency of performance factor COP EN14511 Norm. This norm measuring system efficiency at fixed set points and it is therefore not reflecting a “real life” situation.

For this reason, a more accurate norm to measure seasonal coefficient of performance was developed. Measuring on this basis considers climate in which is system operated, variable (weather compensated) heating water temperature and room temperature requirements. The methodology for determining energy efficiency is called SCOP and is given by the standard EN 14 825.

Thanks to the state-of-the-art technology and advanced regulation, MasterTherm heat pumps are among the most economical and efficient heat pumps on the European and world market. This corresponds to their classification into the highest classes and the achieved value of heating efficiency Ƞs. In many cases, they already meet the future highest class A +++ (in force since 2019) as well as holding the European KEY Mark and many other certificates.

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What is SCOP?

Seasonal average heating factor

The seasonal heating factor expresses the ratio of the total amount of heat produced and the total electricity consumption of the heat pump. Unlike the heating factor COP, which is specified for a specific temperature condition (eg COP = 3.2 at A2W35 – air temperature 2 ° C and heating water temperature 35 ° C), the SCOP is determined for the entire heating season. The amount of heat produced and electricity consumption is, determined as the sum of values for individual sub-intervals in steps of 1°C taking into account their duration, heat pump heating factor for a given temperature interval and real room temperatures. It also including consumption of additional heat source (electric or other boilers) at outdoor of -10 °C and lower.

SCOP thus characterises the actual efficiency of the heat pump in real operating conditions much more accurately than in the case of COP evaluation.

What is the seasonal energy efficiency of a heat pump?

The degree of efficiency of the use of non-renewable primary energy by a specific heat pump

Seasonal energy efficiency expresses the degree of efficiency of the use of non-renewable primary energy by a specific heat pump. It is calculated as the ratio of the seasonal heating factor of the heat pump and the efficiency coefficient of electricity production and distribution and is given in %. Thus, if the value of seasonal energy efficiency is, for example, 150%, the heat pump will supply 50% more energy during the heating season than its primary energy consumption (ie the consumption of non-renewable energy to produce electricity to drive the heat pump).

For evaluation purposes, 2 types of applications are distinguished: Medium temperature, where the heat pump provides an outlet temperature of 55 ° C and low temperature with a temperature of 35 ° C. That however doesn’t mean that you will be operation your radiators at 55 ° C but it means that the design temperature of your heating distribution system ( for example ) radiators can conduct required amount of heat at design temperature -10 ° C

This can only be applied if heat pump control system operates all parts of heating distribution system on weather compensation bases. On/OFF control system principles completely defeat weather compensation control efficiency.

Seasonal energy efficiency class of heating Seasonal energy efficiency of heating Ƞs in%
Low temperature 35 ° C Moderate temperature 55 ° C
A++ Ƞs> 150 Ƞs> 125
A+ Ƞs= 123-150 Ƞs= 98-125
A Ƞs= 115-123 Ƞs= 90-98
B Ƞs= 107-115 Ƞs= 82-90
C Ƞs= 100-107 Ƞs= 75-82
D Ƞs= 61-100 Ƞs= 36-75

Energy efficiency parameters of MasterTherm heat pumps

Take a look at the efficiency parameters of all our heat pumps below

BoxAir

air-water low temperature operation 35 ° C medium temperature operation 55 ° C
BoxAir performance* SCOP Ƞs % class performance* SCOP Ƞs % class
BA 22Z 8 kW 3,66 144 A+ 8 kW 3,00 117 A+
BA 26Z 11 kW 3,63 142 A+ 10 kW 2,84 111 A+
BA 30Z 12 kW 3,64 143 A+ 12 kW 2,86 111 A+
BA 37Z 16 kW 3,71 145 A+ 15 kW 2,97 116 A+
BA 45Z 19 kW 3,89 153 A++ 18 kW 3,08 120 A+

air-water Low temperature operation 35 ° C Medium temperature operation 55 ° C
BoxAir Inverter performance* SCOP Ƞs % class performance* SCOP Ƞs % class
BA 22I 5 kW 4,18 164 A++ 4 kW 3,22 126 A++
BA 26I 7,5 kW 4,40 173 A++ 7 kW 3,36 132 A++
BA 30I 8,5 kW 4,49 177 A++(+) 8 kW 3,45 135 A++
BA 37I 11 kW 4,48 176 A++(+) 10 kW 3,5 137 A++
BA 45I 14 kW 4,30 169 A++ 13 kW 3,32 130 A++
BA 60I 22 kW 4,47 176 A++(+) 24 kW 3,42 134 A++

air-water low temperature operation 35°C medium temperature operation 55°C
BoxAir Inverter Split performance* SCOP Ƞs % class performance* SCOP Ƞs % class
BA 22IS 5 kW 4,18 164 A++ 4 kW 3,22 126 A++
BA 26IS 6,5 kW 4,28 168 A++ 6,3 kW 3,24 126 A++

air-water low temperature operation 35°C medium temperature operation 55°C
BoxAir Inverter Split Combi performance* SCOP Ƞs % class performance* SCOP Ƞs % class
BA 22ISC 5 kW 4,18 164 A++ 4 kW 3,22 126 A++
BA 26ISC 7,5 kW 4,40 173 A++ 7 kW 3,36 132 A++

air-water low temperature operation 35°C medium temperature operation 55°C
EasyMaster performance* SCOP Ƞs % class performance* SCOP Ƞs % class
EM26Z 11 kW 3,62 142 A+ 10 kW 2,84 111 A+
EM30Z 12 kW 3,67 144 A+ 12 kW 2,88 112 A+
EM37Z 16 kW 3,74 147 A+ 15 kW 3,00 117 A+
EM60Z 25 kW 3,56 140 A+ 24 kW 2,86 111 A+
EM75Z 31 kW 3,61 141 A+ 30 kW 2,92 114 A+

air-water low temperature operation 35°C medium temperature operation 55°C
AirMaster performance* SCOP Ƞs % class performance* SCOP Ƞs % class
AM3015Z 6 kW 3,60 141 A+ 6 kW 2,90 113 A+
AM3021Z 8 kW 3,73 146 A+ 8 kW 3,00 117 A+
AM3030Z 12 kW 3,87 152 A++ 12 kW 3,08 120 A+
AM3038Z 15 kW 3,90 153 A++ 15 kW 3,10 121 A+
AM3045Z 18 kW 3,93 154 A++ 17 kW 3,13 122 A+

ground-water low temperature operation 35°C medium temperature operation 55°C
AquaMaster performance* SCOP Ƞs % class performance* SCOP Ƞs % class
AQ22Z 8 kW 4,5 172 A++ 7 kW 3,17 117 A+
AQ26Z 10 kW 4,34 166 A++ 9 kW 3,11 116 A+
AQ30Z 11 kW 4,29 164 A++ 11 kW 3,16 118 A+
AQ37Z 14 kW 4,46 170 A++ 13 kW 3,16 118 A+
AQ45Z 17 kW 4,61 176 A++(+) 16 kW 3,19 120 A+
AQ50Z 18 kW 4,42 169 A++ 18 kW 3,37 127 A++
AQ60Z 23 kW 4,27 163 A++ 22 kW 3,14 118 A+
AQ75Z 28 kW 4,25 162 A++ 26 kW 3,11 116 A+
AQ90Z 33 kW 4,42 169 A++ 30 kW 3,10 116 A+
AQ120.2Z 47 kW 4,51 172 A++ 43 kW 3,22 121 A+
AQ150.2Z 57 kW 4,38 167 A++ 52 kW 3,19 119 A+
AQ180.2Z 64 kW 4,50 172 A++ 61 kW 3,35 126 A++

ground-water low temperature operation 35°C medium temperature operation 55°C
AquaMaster Inverter performance* SCOP Ƞs % class performance* SCOP Ƞs % class
AQ 22I 7 kW 4,61 177 A++(+) 6 kW 3,53 133 A++(+)
AQ 30I 11 kW 4,85 186 A++(+) 11 kW 3,78 143 A++(+)
AQ 45I 21 kW 4,80 184 A++(+) 19 kW 3,70 140 A++(+)
AQ 60I 33 kW 5,02 193 A++(+) 33 kW 3,97 151 A++(+)
AQ 90I 44 kW 4,87 187 A++(+) 43 kW 3,87 147 A++(+)

* performance – at design outdoor temperature -10 ° C. A ++ (+) – meets class A +++ valid since 2019