Caleffi. The SRCC-certified Solarie Solar Heat Pump is an all-in-one collector and storage tank system that eliminates the need for a separate backup water heater. Using demineralized water instead of refrigerant liquid as a heat exchanger, it pumps the water to its rooftop collectors only when sunlight is available, then drains the water to the holding tank during sunless periods. This prevents the system from freezing or overheating, even during power failures. When needed, water is heated automatically by a backup electric element or gas burner built into the tank. 414.238.2360. 
http://www.caleffi.us/.
Caleffi. The SRCC-certified Solarie Solar Heat Pump is an all-in-one collector and storage tank system that eliminates the need for a separate backup water heater. Using demineralized water instead of refrigerant liquid as a heat exchanger, it pumps the water to its rooftop collectors only when sunlight is available, then drains the water to the holding tank during sunless periods. This prevents the system from freezing or overheating, even during power failures. When needed, water is heated automatically by a backup electric element or gas burner built into the tank. 414.238.2360. http://www.caleffi.us/.

Caleffi.
The SRCC-certified Solarie Solar Heat Pump is an all-in-one collector and storage tank system that eliminates the need for a separate backup water heater. Using demineralized water instead of refrigerant liquid as a heat exchanger, it pumps the water to its rooftop collectors only when sunlight is available, then drains the water to the holding tank during sunless periods. This prevents the system from freezing or overheating, even during power failures. When needed, water is heated automatically by a backup electric element or gas burner built into the tank. 414.238.2360. www.caleffi.us.