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Oct. 1—Heat pumps are useful for keeping warm in Maine. But they can't replace a home's central heating system on the coldest winter days, especially in an old house. That was what Kathy Heseltine ...

New York has never shied away from a challenge. Today, as the state’s new energy plan charts a path toward deep ...

David Richardson, co-founder of Elephant Energy, leans on a condenser placed on the roof during the installation of a heat pump in an 80-year-old rowhouse last January in northwest Denver. Credit: AP ...

I was wondering approximatly how much it costs to add central air/heat pump to an existing house. I am not quite sure of the square footage, but on a half a double with 3 bedrooms and 1.5 bath. Not a ...