The feds challenged heat pump makers to build models that worked well in the cold. The first ones are about to go on sale.

But now, through the use of modulated technology such as two-stage and variable-speed compressors, heat pumps run more efficiently and can be installed in a wider range of geographies.

MODERN ERA: Today’s more advanced heat pumps leverage staged or variable-speed compressor technology that keep pace with changing temperature more efficiently and more accurately. (Courtesy of Johnson ...

Its single- and two-speed pumps are more affordable initially than the variable or specialty pumps, but variable pumps might be more cost-efficient to run throughout the year. All Jandy variable ...

A new solar-powered variable speed drive (VSD) model compatible with a wide range of water pumps has recently been launched. The Altivar solar ATV320 is Schneider Electric’s replacement offer for the ...

A SEER rating indicates how effectively an air conditioner or heat pump can cool a house ... have more efficiency features, such as variable speed and built-in Climate Set technology.

At only 120 lbs, the new V2 is the lightest twin-cylinder in Ducati’s history, featuring variable valve timing and ...

Commissions do not affect our editors' opinions or evaluations. A variable annuity is a way to get the stability of a traditional annuity product with the gains of an investment account—for a price.

"It's kind of like supercharging your car engine," he said. A variable-speed compressor allows the heat pump to cycle that refrigerant through more quickly when the temperature is colder.

A new solar-powered variable speed drive (VSD) model compatible with a wide range of water pumps has recently been launched. The Altivar solar ATV320 is Schneider Electric’s replacement offer ...