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DECARBONIZING SPACE HEATING WITH AIR SOURCE HEAT PUMPS About three-quarters of residential heat pumps installed in the US are in the South (as classified by the US Department of Energy), where ASHP market share is 20 percent. ● The Pacific region is a distant second.13 However, California has seen particularly strong adoption of heat pumps in commercial buildings, with roughly half of the commercial buildings serviced by San Diego Gas & Electric and 40 percent of commercial Southern California Edison customers using heat pumps.14 ● Market penetration in the northern United States is low. In the Northeast, for example, the market share of heat pumps in residential households is roughly 3 percent.15 The US has seen slow but steady growth in heat pump sales, growing from 14 percent to 24 percent of sector-wide shipments from 1998 to 2017 and cutting into the market shares of both furnaces and central air conditioners.16 More air source heat pumps are sold in the US than Europe. In 2015, the US saw 2.3 million ASHP shipments, compared with 429,000 ASHPs in Europe. In 2015, heat pumps accounted for 10 percent of the US residential heating market, or about 11.8 million units. Europe has about 9 million heat pumps, about half of which are ASHPs.17 However, many European countries have faster deployment rates. For instance, in 2018, nearly 5 percent of all households in Norway installed a new ASHP.18 Figure 4: US heat pump shipments compared to competing technologies19 Source: AHRI 14 | CENTER ON GLOBAL ENERGY POLICY | COLUMBIA SIPAPDF Image | DECARBONIZING SPACE HEATING WITH HEAT PUMPS
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