Support CleanTechnica’s work through a Substack subscription or on Stripe. The 120-volt plug-in heat pump water heater allows homeowners to easily plug a highly efficient water heater into a standard outlet. This is transformational because it allows the 60 million U.S. homes with gas water heaters to easily and cheaply … Continue reading Our New 120-Volt Plug-In Heat Pump Water Heater Is One of the First in the Country