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.
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.
- 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.
- Will an air source heat pump provide enough hot water for heating and hot water?
- If you do not heat your water beyond 55°C and your system has been correctly scaled and fitted for your needs there is no reason why all your domestic hot water requirements shouldn't be provided by the air source heat pump throughout the year. It should be noted that heat pumps produce water at a lower temperature than boiler systems, meaning that you will need larger radiators or an underfloor heating system or the pump to heat your house effectively.
- Will I need a new boiler to install an air source heat pump?
- An air source heat pump can provide all your hot water and heating requirements without the need for top-up from a boiler. However, a boiler can be used alongside the pump system as a top up to meet demand in colder weather. This will depend on your current heating system's design.
- 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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