... refrigerant 4.EEV&PHE use 5.Flexible,floor,radiators,coil,water SAVE ENERGY, COMFORTABLE WARMTH IN YOUR HOME ENS Multi wall ... costs to gas fired boilers → Flexible, can be connected to underfloor heating,low temperature radiators or fan coils → Compresser-Rare earth permanent ... the following conditions( European standard:EN14511-2)Heating: Ambient 7°CDB/6°CWB / Leaving Water Temp. 35°C (DT 5°C) ...