... in all climates 3) Reliable and efficient with twin-glass solar tubes 4) Copper heat pipes for rapid heat transfer5) ... maintenance 7) Suitable for pressure water (8 bars / 116PSI) 8) Corrosion resistant silver brazed copper header 9) Frame material: 304 ... on the balcony or windowsAdvantages:1.CE,UL,ISO9001,CCC,Solar water heater with SOLAR KEY MARK certificate2.High efficiency, Absorption rate: =93%, ...