Three years ago, the mercury dipped well below zero, significantly colder than this week. The Globe reached out to heat pump owners to see how their systems fared in the bitter cold in February 2023.

The highly efficient devices are the darlings of the environmental movement. Here’s why. By Hilary Howard Heat pumps, which both warm and cool buildings and are powered by electricity, have been ...

A common refrain is that they’re only effective in mild climates. We put that idea to the test. Credit...Photo illustration by The New York Times; Shutterstock Supported by By Sofia Quaglia Heat pumps ...

Compact heat pumps that slot into windows could be a planet-friendly way to efficiently heat and cool apartment buildings without breaking the bank, experts say. While many single-family residences ...