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Mass Save | 2023 Air Source Heat Pump Minimum Efficiency Requirements
The Department of Energy has developed a new procedure for testing heat pump efficiency called the M1 testing method. This testing method was designed to better reflect current field conditions and provide more accurate efficiency ratings.
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Air to Water Heat Pumps | Residential | Mass Save
Air to water heat pumps can provide a total solution for heating, cooling, and hot water supply in a home.