Air Source Heat Pumps

You can use heat absorbed from the air to heat your home – even in winter!

Air source heat pumps absorb heat from the outside air, like a fridge in reverse, and this heat can be concentrated and used to heat your home or hot water. It is usually used in radiators, under-floor heating systems, or warm air convectors, saving you money in the process.

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The Basics

Heat can be extracted from the air even when the outside temperature is as low as minus 15°C, although heat pumps are more efficient at higher temperatures.

Currently they qualify for the government’s Renewable Heat Premium Payments scheme, which gives a voucher for £850 towards the cost of installation, but even without this they can produce valuable energy savings.

In a similar way, heat can be extracted from exhaust air being ventilated from your home and transferred to the incoming air via a heat exchanger. These systems are called MVHR (Mechanical Ventilation and Heat Recovery).

They do require some electricity to circulate the heat that they extract, but this heat is constantly renewed so they will capture more energy than they expend.

The savings that can be made vary depending on the type of fuel that you are replacing, however the Energy Saving Trust trials suggest that a 3 bedroom semi currently using oil or solid fuel for heating and hot water could save around £300, with homes using electricity saving as much as £610.

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FAQs

Do air source heat pumps require any maintenance?
Typically no annual maintenance is required, but there may some makes and models that do require some checks to be carried out.
How much space do I need for my air source heat pump?
This will depend on the make and model of the heat pump. The air handling unit component of the pump will need to be fitted in a location where air can circulate freely, so typically on an outside wall. Typically the air handling unit will be similar in size to a kitchen appliance, such as a washing machine or dishwasher. You will also need space inside your house for the heat pump itself.
Can I heat my swimming Pool with an air source heat pump?
Air source heat pumps are ideal for pools. Note that for existing swimming pools the current heat exchanger would need to be changed.
How many air source heat pumps would I need for a large building?
This depends on the model that you choose, however if you home is well insulated you will need fewer heat pumps to maintain the same temperature level. Your installer will be able to advise you on exactly how many you will need.
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