... on your slope roof, more effective to use solar energymore steady, even anti-typhoon2.SUS304 2B 1. ... a modern life fashion, warm water,warm life.Solar water heater parameter Collector paramaterEvacuated tube47mm*1500mm,58mm*1800mmEvacuated ... stainless steel,galvanizedSolar water heater specifications: Split pressurized solar water heater Solar collector : adopt sectional metal heat-pipe vacuum tube ...