Johnson Controls-Hitachi Air Conditioning has developed a residential dual fuel heat pump system that combines an air source heat pump and a gas furnace. The manufacturer says the furnace is designed to ensure there is no compromise in heating performance, even when temperatures are extremely low.Johnson Controls-Hitachi Air Conditioning has launched a new residential heat pump system combining an air source heat pump (ASHP) and a gas furnace. "When temperatures are extremely low, most heat pumps rely on energy-intensive, electric resistance 'strip' heating, which can significantly increase ...Den vollständigen Artikel lesen ...