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Even in Frigid Temperatures, Air-Source Heat Pumps Keep Homes Warm From Alaska Coast to U.S. Mass Market | News | NREL
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Air-Source Heat Pumps - Massachusetts Clean Energy Center
International Commission Votes to Allow Use of More Climate-Friendly Refrigerants in AC and Heat Pumps - Inside Climate News
A Brief Introduction to Air Source Heat Pumps - Ways2GoGreen
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