Air source heat pumps: how do they work?
The concept of an air source heat pump (ASHP) is simple: they absorb heat from the outside air to heat your home and hot water. Amazingly, ASHPs can extract heat from the air even when temperatures are as low as -15 Celsius. Although ASHPs do require electricity to run, the heat output is greater than the electricity input, making them an energy efficient and eco-friendly method of heating your home. However, an ASHP is subject to changing air temperatures, meaning that during the colder months the pump will need to use more units of electricity.
To fit a ASHP, you’ll need an area on the exterior of your home where you can mount a unit to the wall, with enough space around it to get a good air flow. ASHPs are easier to install than ground source heat pumps, which operate in the same way – but instead draw heat from the ground. If you have a large garden, then you could install a ground source heat pump – which, despite the greater upfront installation costs, is more efficient in the long run, resulting in lower energy bills.
Air source heat pumps: Performance
Air source heat pumps perform very well with underfloor heating systems, or warm air heating – because they operate at lower temperatures, although this partly depends on the size of the building being heated. Homes will need a central heating system in order to work with an ASHP.
Most of our heat pump systems come with a warranty of two to three years, although most manufacturers offer the option of an extension for a fee. With regular and reliable maintenance, ASHPs can be expected to last for upwards of 20 years. There are some maintenance checks you can undertake yourself, such as checking the air inlet grill and evaporator are free from leaves and other debris, and make sure that no plants are growing near to your unit. We can also set up a regular service schedule, much like with a standard boiler system.