Heat pumps can be more efficient than furnaces in mild climates. Geothermal and water-source heat pumps are expensive but offer high-efficiency heating and cooling in all weather conditions.

Thermostat Settings for Each Season The two main types of heat pumps commonly used for residential homes are air-source and ...

Researchers at the University of Padova in Italy have proposed to improve the performance of residential air heat pumps with air-geothermal heat exchangers and have found this combination may ...