WHeat pump
WAbsorption heat transformer
WAbsorption refrigerator
WApplications of the Stirling engine
WEcoCute
WEinstein refrigerator
WEntropy production
WGeothermal heat pump
WGeothermal heating
WHeat pump and refrigeration cycle
WIcyball
WRefrigerator
WReversing valve
WPeter von Rittinger
WSolar-assisted heat pump
WStirling engine
WStoddard engine
WThermal mass refrigerator
WThermoacoustic heat engine