Extract air from outside to heat your home and water. It can also be used to cool your home.

What is an Air Source Heat Pump?

An Air Source Heat Pump (ASHP) is an energy efficient way of heating a home, and saving money on energy. This type of heat pump system is capable of extracting heat from outside of a building, and transferring it inside through the use of a refrigerant system which uses a compressor and condenser to absorb the heat.

Is it Worth Getting an Air Source Heat Pump?

Air Source Heat Pumps work much the same as an air conditioning unit, but are used to transfer heat into your home rather than extract it. A professional heating engineer can assess the best placement for your new heat pump system, and install them to achieve maximum heating efficiency throughout your home or office.

The benefits of using an air source heat pump are:

  • Reduce your carbon footprint by using renewable energy. Generate less CO2 emissions as pumps are high efficiency and run using electricity.
  • Cheaper to run than Oil or LPG alternatives.
  • Ideal to use with underfloor heating.
  • Uses the same technology as our fridges and freezers and these require little or no maintenance.
  • Can be used to provide cooling in the summer months.
  • Heat pumps are included in the Renewable Heat Incentive (RHI) which makes them a viable financial investment.
  • Compact in size and highly efficient.

There is no better time to save money on your energy by going green. Air source heat pumps and other renewable energy heating solutions are extremely effective and reliable.

Less CO2

Highly Efficient

Heat & Cool


Installation Process

Installation of an air source heat pump is easier and less expensive to install than a ground source heat pump, as there is no collection pipework to install into the ground. 

Air source heat pumps are not suitable for all properties, however, and other alternative renewable heating solutions, or a combination may be more effective. We recommend you speak to our accredited gas safe engineers for professional advice and a free of charge quotation. Discover how you can save money on your energy bills today!

Can Air Source Heat Pumps Work With Existing Radiators?

Air Source Heat Pumps can be installed on to an existing heating system, although some radiators may need to be replaced with a larger model to accommodate for the lower running temperatures of these heat pumps.

Air Source Heat Pumps Near Me

With over 70 years of experience, the Red Van Plumbers offer a professional and fast service in a wide area including Marlow, High Wycombe, Acton, Wooburn Green, Henley, Hemel Hempstead, Hillingdon, Maidenhead, Windsor, Amersham, Reading, Beaconsfield, Gerrard’s Cross, and West London.

Accredited by trusted sites such as Which?, TrustMark, Gas Safe Register, Check-a-trade, OFTEC, and more, the Red Van Plumbers are the best choice to help you reduce your cost of living with our range of services and installations.

What to Consider?

To help our customers and provide some guideance, we have produced the information below.

What supplies your heating and hot water presently?

Cost of installation can vary depending on what heating system you currently have. For example, is your home gas or oil? Does the heating system have a cylinder or is it a combination boiler?

If you require the heat pump to provide hot water, then a new high efficiency cylinder has to be fitted as well as an expansion vessel and additional space for a 30 or 50L volumiser/buffer unit.

Do you have radiators?

Typical a gas boiler flow temp is 70 degrees. Whereas, an air source heat is between 30-45 degrees. With a heat pump running at lower temperatures the radiators may have to be larger to counteract this.

Additional information: As the system takes longer to heat from cold, the heating is left on for longer periods of time. The control temperature is turned down overnight and when the house is unoccupied, rather than being switched off completely. Air source heat pumps work well with underfloor heating.

Do you have a suitable position for an air source heat pump outside?

Depending on the output of the unit, it is approximately 1000mm wide x 1418mm high x 330 deep.

Ideally, the heat pump should be positioned in a South facing location. If floor standing, it has to be 300mm away from the wall on a suitable level base. It can be wall hung, which reduces this clearance to 150mm. Unit clearances of 300mm from the top, 600mm from the controls side, 100mm from the other side and 600mm from the front is required.

Insulation – Are the house walls, floors and roof well insulated?

Due to the lower running temperatures of a heat pump, it is vital that heat loss is kept to a minimum, the more insulated a property is, the more effective and efficient the heat pump will be.

Do you know about the Boiler Replacement Grant - Government Grants?

The government is laucnhing a new scheme to replace the Green Homes Grant. Discover more here.


Heppelthwaite Green Building Solutions


The government will provide grants to encourage property owners to install low carbon heating systems such as heat pumps, through the Boiler Upgrade Scheme (BUS). These grants will help property owners overcome the upfront cost of low carbon heating technologies. To discover more please see visit our main renewable energy page.