Field Test of High Volume Heat Pump Water Heaters
Air-to-water heat pumps can produce domestic hot water can produce domestic hot water at nearly three times the efficiency of electric resistance systems. They also have a side benefit of cooling and as a result the best applications are in facilities that need both domestic hot water and space cooling. Unlike residential or small commercial heat pump water heaters (HPWH) don’t have an integrated storage tank and high volume HPWHs are offered only by a few manufacturers, including Colmac and Nyle. Suitable applications include facilities (ie. restaurants, hospitals, dorms, multifamily, etc.) that have total daily domestic hot water consumption of 500 gallons per day or more.
Water-to-water heat pumps can produce domestic hot water with even higher efficiencies than air-to-water heat pumps but they don’t have the added value of space cooling, so care should be taken when planning for best system.
This ET Field Test could fully fund up to 5 High Volume Heat Pump Water Heaters, replacing retrofitting electric resistance water heaters with total daily domestic hot water consumption of 500 gallons per day or more, with the intent of informing a region-wide offering.