Germany's Vaillant has developed an air-source heat pump that uses propane (R290) as the refrigerant. It can produce between 3.4 kW and 8 kW of heat, and domestic hot water to a temperature of up to 75 C. It says the heat pump maximizes savings when paired with rooftop solar.Vaillant has joined Bosch and Mitsubishi in releasing an air-source heat pump that uses R290 as the refrigerant. The Germany-based heat pump manufacturer said its new heat pump is designed for retrofit installations and new buildings. "Our new aroTHERM plus in air-to-water hat pump that can also be used in retrofit installations ...Den vollständigen Artikel lesen ...