Energy efficiency

Heat pumps

New plan aims to quadruple heat-pump adoption in 25 states

The pledge, which covers 55% of the population, calls for accelerating home decarbonization by deploying 20 million heat pumps by 2030.

Jeff St. John  . 

A man with a beard and ponytail hooks hoses to an appliance installed in an exterior window of a home
A technician installs a heat pump at a home in Windham, Maine. (Tristan Spinski/The Washington Post/Getty Images)