The complete source for building, designing, and remodeling green homes

Musings of an Energy Nerd
Split-System Heat-Pump Water Heaters

Japanese ‘Eco Cute’ water heaters will soon be available in the U.S.
Energy Solutions
A Heat Pump Using Carbon Dioxide as the Refrigerant

A new generation of CO2-based heat pumps could avoid the high global warming potential of standard refrigerants and generate much higher temperatures

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Split-System Heat-Pump Water Heaters