... ,CIF 3)CE,ISO9001,SGS,EN12975,SRCC,solar keymark 4)2%spare tube free Sunfield Solar Luxury air source heat pump provides ... able to be integrated with energy systems such as solar heater and boiler. Three different types are available in this series: DAO ... and fan-coils 4) Standard low temperature radiators 5) Thermal solar energy New Energy Saving Air Source Heat Pump ...