... new trivalent element heat tube, borrosilicate glass 3.37) Solar working station8) With heat pipe: anti-freezing > -35 ... your diverse water needs; 1 +1 complementarity of solar and electrical energy, energy saving, heat is greater; ... out of the climate alone limits of solar , You can always enjoy the hot water.3. ... bathing, washing, laundry, washing fruits and arbitrary. solar water heater