WHeat pump
WAbsorption heat transformer
WAbsorption refrigeratorWAir source heat pump
WApplications of the Stirling engine
WDirect exchange geothermal heat pump
WEcoCute
WEinstein refrigerator
WEntropy production
WGeothermal heating
WGround source heat pumpWHeat pump and refrigeration cycle
WIcyball
WRefrigerator
WReversing valve
WPeter von Rittinger
WSolar-assisted heat pump
WStirling engineWStoddard engine
WThermal mass refrigerator
WThermoacoustic heat engine