230 A 100% use of gas boiler B Heat pump + gas boiler C 100% use of heat pump +35% efficiency (space heating) compared to existing condensing gas boiler Heat consumption (kWh /°C) 2,000 1,800 1,600 1,400 1,200 1,000 800 600 400 200 0 °C -7 0 15 C B A A running costs comparison is made below based on parameters for a typical Belgian winter. As a result of the Hybrid principle, the most cost-efficient operation will be used no matter the ambient outdoor temperature. Daikin altherma Hybrid heat pump New gas condensing boiler Existing gas condensing boiler Space heating Energy supplied by HP 12,800 kWh HP efficiency 3.64 Scop Energy supplied by gas boiler 6,700 kWh 19,500 kWh 19,500 kWh Space heating efficiency 90% 90% 75% Running costs 1,220 € 1,520 € 1,820 € DHW heating Energy supplied by gas boiler* 3,000 kWh 3,000 kWh 3,000 kWh DHW heating efficiency* 90% 80% 65% Running costs* 230 € 260 € 320 € Total Running costs 1,450 € 1,780 € 2,140 € * for combi-boiler, no separate domestic hot water tank Conditions Heat load 16 kW Design temperature -8 °C Space heating off temperature 16 °C Maximum water temperature 60 °C Minimum water temperature 38 °C Gas price 0.070 €/kWh Electricity price (day) 0.237 €/kWh Electricity price (night) 0.152 €/kWh Total space heating requirement 19,500 kWh Total DHW heating requirement (4 persons) 3,000 kWh Yearly savings: for space heating and domestic hot water -19% versus new gas condensing boiler 330 €/year -32% versus existing gas condensing boiler 690 €/year Case study Replacing a gas boiler with a Daikin Altherma Hybrid heat pump means saving on running costs for both space heating and domestic hot water supply.
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