... Solar Keymark, SRCC and CE Water-saving Tube Tube in flat collector with Model HFC-2Pipe type: Heat pipe, direct-flow ... -iron tempered glassFrameAl-6063(Powder painting)InsulationGlass woolSealingEPDMMounting frames for flat roof and slope roof are availableFunctions: domestic hot water or ... , public center hot water, hospital, swimming pool etc. heat pipe flat plate solar collector