https://trellis.net/article/cost-effective-new-study-confirms-heat-pump-efficiency-freezing-temperatures/
New research by Oxford University and the Regulatory Assistance Project analyzes how well heat pumps perform when temperatures drop below freezing.
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https://www.carrier.com/residential/fr/ca/homeowner-resources/hvac-glossary/hspf-rating/
Learn about the heat pump efficiency rating HSPF2, including how it is calculated and how a higher HSPF rating can help save energy.
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https://www.utilitydive.com/news/heat-pump-sales-topped-gas-furnaces-United-States/652277/
The International Energy Agency also said in its report, Energy Efficiency - The Decade for Action , that electric vehicle sales in the U.S. rose 55% last year.
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