... capacity 13) Tubes easily replaced if broken, can be used with broken tubes 14) Ideal for commercial solar water heating applications ... or windowsAdvantages:1.CE,UL,ISO9001,CCC,Solar water heater with SOLAR KEY MARK certificate2.High efficiency, Absorption rate: =93%, thermal ... Competitive price, all the parts are made by our factory. With the same quality of products, we are cheaper than others4 ...