10 Facts About Heat pumps

Many heat pumps can operate in the opposite direction, cooling the building by removing heat from the enclosed space and rejecting it outside.

When used for space heating, heat pumps are typically much more energy efficient than simple electrical resistance heaters.

The carbon footprint of heat pumps depends on how electricity is generated, but they usually reduce emissions in mild climates.

Air source heat pumps are used to move heat between two heat exchangers, one outside the building which is fitted with fins through which air is forced using a fan and the other which either directly heats the air inside the building or heats water which is then circulated around the building through radiators or underfloor heating which release the heat to the building.

Air source heat pumps are relatively easy and inexpensive to install and have therefore historically been the most widely used heat pump type.

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Ground-source heat pumps are more expensive to install due to the need for the drilling of boreholes for vertical placement of heat exchanger piping or the digging of trenches for horizontal placement of the piping that carries the heat exchange fluid .

Exhaust air heat pumps extract heat from the exhaust air of a building and require mechanical ventilation.

In Europe, more than 1500 MW of large-scale heat pumps were installed since the 1980s, of which about 1000 MW were in use in Sweden in 2017.

Carbon footprint of heat pumps depends on their individual efficiency and how electricity is produced.

In most settings, heat pumps will reduce CO2 emissions compared to heating systems powered by fossil fuels.