... heater composed by heat pipe vacuum tube solar collector, pressure storage tank, controller, working station. Split pressurized solar water heater ... as usual under -38celsuis. 6)Bathing, washing, domestic heating. 7)pressure: 0.7Bar. 8)capacity: 100L, 200L, 250L, 300L, 400L, ... 1) When the temperature difference between solar collector and tank reaches the set value, the controller will start the ...