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During the past decade, heat pumps have increased in popularity in the United States as a more efficient and environmentally-friendly alternative to traditional heating systems. This report provides insight into the shipments of heat pumps for space- and water-heating, the usage of heat pumps by households, their price and environmental impact, and the international trade of heat pumps. It also includes a chapter looking at the the number of companies and employees active in the HVAC-R industry.