A water heater accounts for almost 20 percent of a home's energy use! Keep energy efficiency and your hot water needs in mind ...

New research from Germany shows that the optimal size of residential heat pumps in retrofit buildings can be achieved without ...

Approving the initiative tells lawmakers that they need to reboot plans — and rebuild trust — in the challenge of reducing ...

A heat pump's refrigerant transfers heat into or out of the house, depending on whether it's in heating or cooling mode. Switching the mode is accomplished by using the reversing valve or a setting on ...