Mike De Socio is a CNET contributor who writes about energy, personal finance, electric vehicles and climate change. He's also the author of the nonfiction book, "Morally Straight: How the Fight for ...

Heat pumps have annually outsold gas furnaces for several years now, and with the recent introduction of more high-efficiency, cold-climate, air-source heat pumps, that trend is likely to continue.

Heat pumps have become a kind of Rorschach test for the future of home comfort: to some people they are a climate solution, to others an expensive gamble. What rarely makes it into the marketing copy ...