... 3. warranty: 3year for system,5year for vacuum tube. Detailed Product Description:split pressurized solar water heater:heat collectorwater tankworking ... not reach the Tm ax, then start the auxiliary heating device.Features:1. collector separates with the storage tank, ... the fized temperature.6. Multi-function: Bathing, Washing, domestic heating, etc..7. work at anytime, enjoyable device.8. Model ...