What are Air Source Heat Pumps?

Save up to 40% on your heating bills with a FREE renewable Heating System*

Air Source Heat Pumps are a form of heating which extracts warmth from the air, even when it is very cold outside and uses this warmth to heat your home and provide you with hot water.

For homes that are not connected to the gas network, Air Source Heat Pumps can be a very efficient form of heating saving up to 40% on energy bills as compared to heating your home with oil or electricity.* 

Durham County Council have partnered with Pacifica Group, 0800 Repair and the Warm Homes Fund (WHF) to create a scheme to offer eligible residents who are not connected to the gas network a free fully installed central heating system.

There are only 100 free heating systems available so if you think you are eligible and you are interested call us today.

What are Air Source Heat Pumps?

Air source heat pumps serve as an alternative way to heat your home and  provide hot water. An air source heat pump is usually placed outdoors at the side or back of a property. It takes heat from the air and boosts it to a higher temperature using a heat pump. The pump needs electricity to run, but it will use less electrical energy than the heat it produces. Take a look at the graphic below for a visual representation of how an air source heat pump functions.

There are two main types of air source heat pumps: air-to-water and air-to-air. The system we are offering you is an air-to-water system. An air source heat pump works a bit like a refrigerator in reverse. The process consists of an evaporator, a compressor and a condenser. Air-to-water heat pumps take heat from the outside air and feed it into your wet central heating system. As the heat produced is cooler than that from a conventional boiler, larger radiators are installed to compensate. 

Benefits and savings

By replacing existing ‘off gas’ heating like solid fuel, electric or bottled LPG - with an Air Source Heat Pump, there are immediate cost savings for home owners and tenants, with typical savings expected to be in the range of 40%* and potentially more.

This is because renewable heating like this is very clean and efficient to run, and over a year can expect to run at more than 3 times the efficiency of alternative heating systems like oil, electric or solid fuel systems.


You can set your room temperature with an air source heat pump in exactly the same way as gas central heating and if you stick to the temperature setting of 21° you will enjoy maximum cost savings.

Following an initial survey, he fitting of your air source heat pump is straight forward and typically only takes one day of disruption with commissioning and testing of the system on day two.

By switching to a renewable heating system you will also be doing your bit for the environment and helping Durham County Council achieve its target of becoming carbon neutral by 2050.

Warranties and Servicing 

Your air source heat pump comes with a 7 year parts and labour warranty so if anything goes wrong with your heating system it will be repaired free of charge. 

It is a requirement of the 7 year warranty that you have your heating system serviced annually, as part of this project we will be paying for the 7 year service costs of your heating system. You will be contacted by the service contractors before the service is due to make a convenient appointment. 

The installation process

Establish customer eligibility with 0800 Repair



Review EPC or commission new EPC to confirm performance and benefits of your Air Source Heat Pump

Home survey to confirm installation arrangements


Review customer contract and confirm funding



Delivery of Air Source Heat Pump

Two day installation - day 1 fitting, day 2 commissioning



Follow up after 7 days to ensure everything is working and you are happy with your ASHP

© 2021 Warm Homes Durham

Pacifica Group
Durham County Council