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Current residential heat pump water heater products are add-on units used in conjunction with conventional storage tanks and they are produced by a handful of very small U.S. companies. The recent introduction of ENERGY STAR water heater criteria appears to be incentivizing some larger appliance manufacturers to develop new heat pump water heater products that will be more widely available. If consumer interest in heat pump water heaters increases, the market would need to scale up significantly to meet greater demands, opening greater opportunities for U.S. component manufacturing in the value chain. This topic is explored in-depth in this report by the Duke GVC Center for the Environmental Defense Fund (EDF).
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