A Solar-Assisted Heat Pump Water Heater
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A version of this article appears in the Winter 2018
issue of Home Energy Magazine.
December 10, 2018
Water heating in residential buildings has become more important as the overall efficiency of buildings has improved over the last decade, with energy efficiency code requirements for A/C, lighting, and the building envelope. Modest improvement in energy efficiency for electric-storage water heaters was implemented in 2015, with the Code of Federal Regulations (CFR). But much greater improvements remain to be made.
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