Air Source Heat Pumps

Air source heat pumps (ASHPs) absorb heat from the outside air to heat your home and hot water. They can still extract heat when air temperatures are as low as -15°C.

Air source heat pumps need electricity to run, but because they are extracting renewable heat from the environment, the heat output is greater than the electricity input. This makes them an energy efficient method of heating your home.

If you have large garden space outside, you could consider a ground source heat pump. Despite the greater upfront cost of installing a ground source heat pump, this type of pump is more efficient when it comes to heating your home, which results in higher fuel savings and lower energy bills.

How do air source heat pumps work?

Heat from the air is absorbed at low temperatures into a fluid. This fluid passes through a compressor, increasing the temperature, and transfers that higher temperature heat to the heating and hot water circuits of the house.

There are two main types of ASHP: air-to-water and air-to-air. Choosing an air-to-water or an air-to-air system will determine the type of heat distribution system you need.

Benefits of air source heat pumps

 It could lower your fuel bills, especially if you replace conventional electric heating.

It could lower your fuel bills, especially if you replace conventional electric heating.

It could provide you with an income through the UK Government’s Renewable Heat Incentive (only applies to air-to-water heat pumps).

It could lower home carbon emissions

It could lower home carbon emissions.

There are no fuel deliveries needed.

It can heat your home as well as your water

It can heat your home as well as your water.

ground source heat pump

It can be easier to install than a ground source heat pump.


Unlike gas and oil boilers, heat pumps deliver heat at lower temperatures over much longer periods. If you are installing an ASHP to replace a gas or oil boiler, you should consider whether you can also upgrade your insulation to get the most out of your ASHP. You might also consider fitting larger radiators or underfloor heating.

Is an air source heat pump suitable for me?

If you’re thinking of installing an air source heat pump, contact us today to find out if an air source heat pump is suitable for you.