Heat pump technology makes air conditioners and refrigerators work, which isn’t new. But some of its applications are. Residential heat pump systems, which may replace gas and resistive heat furnaces ...

The ruling won’t stop gas appliances from polluting homes and emitting greenhouse gases. And the sort of ordinance at issue applied only to new construction, not the gas appliances already in homes.

Q: We need a new clothes dryer and are wondering whether to invest in a heat-pump model. I know they are more energy-efficient, but are there big maintenance issues, such as cleaning the condenser ...

The appliances buck a common climate technology trend in the US—for now. Heat pumps are having a surprisingly equitable moment in the spotlight. Using electricity, heat pumps can both heat and cool ...