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Air Source Heat Pump Cost How much would a heat pump cost you?

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Air Source Heat Pumps Explained

Air source pumps serve as an alternative way to heat your home and could be the ideal solution if you want to generate your own heat and save money on your energy bills. They absorb heat from the outside air and increase it to a higher temperature to warm your property. The pump runs on electricity and can operate in temperatures as low as -25 degress, but can generate 2 to 4 times more heat than the electrical energy it uses. This means air source heat pumps are very energy efficient.

Gas boilers will be obsolete by 2025 and air source heat pumps will be the answer for heating your home. Learn about their cost and how they work, as well as read reviews for the best brands like LG Therma V. Learn how much you can save with UK grants available such as The Renewable Heat Incentive (RHI). Heat pumps can save you more on your heating bills if you're replacing an electric, oil, LPG (liquefied petroleum gas) or coal system, rather than gas.

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How Air Source Heat Pumps Work Many air source heat pumps are eligible for payment through the Renewable Heat Incentive (RHI)

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 then compresses the gas, which increases its temperature, and pumps it into your central heating system, where it transfers its heat to your radiators or underfloor heating (and hot water tank, if you have one). The pump needs electricity to run, but it uses less electrical energy than the heat it produces.

Look at the graphic for a visual representation of how air source heat pumps function.

Many air source heat pumps are eligible for payment through the Renewable Heat Incentive (RHI), a government scheme that provides payments to homeowners who generate their own heat.

Reliable Heating

LG THERMA V R32 Monobloc provides reliable and powerful heating for the indoor environment. It can operate even at extremely cold weather like -25°C. Moreover, it can offer leaving water temperature of 65°C at maximum.

Types of Air Source Heat Pump

There are 2 main types of air source heating systems: air to air and air to water.

Air to air

Air to air heat pumps take heat from the outside air and circulate it around your home through fans on the wall or ceiling. Their big advantage is they can heat a room very quickly – faster than radiators, in fact. In the summer they can also provide air conditioning. However, unlike an air to water pump, they can’t produce hot water.

Air to water

Air to water heat pumps take heat from the outside air and use it to heat the water in your central heating system and hot water tank. As the heat produced by the pump is typically cooler than that produced by a boiler, you might need to install large radiators or underfloor heating. Air to water heat pumps are the more popular kind.

How Much Can An Air Source Heat Pump Save You?

An air source heating system can reduce your energy bills considerably if you currently have an old or inefficient boiler.

It costs around £750 per year to run a pump for a 3-bedroom semi-detached house, and £975 per year for a 4-bedroom detached house. The Energy Saving Trust estimates these annual savings from an air source heat pump for a 4-bedroom detached house in England, Scotland and Wales:

Air Source Heat Pump Cost Savings

Old (G-rated) gas boiler £400 - 465
Old (G-rated) oil boiler £460 - 545
Old electric storage heaters £800 - 990
Old (G-rated) LPG boiler £1,145 - £1,350

The EST also estimates annual Renewable Heat Incentive (RHI) payments between £875 to £1,030 a year.

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Air Source Heat Pump Advantages

  • Efficiency: because they usually produce 3 to 4 times more heat than the electricity they consume to generate heat, air source heat pumps can reduce your energy bills and lower your carbon footprint.
  • Easy installation: installation of a air source heat pumps isn’t difficult and you can choose where to place it outside your home. Most homes should be able to accommodate an air source heat pump. Installation often takes no more than a day.
  • No fuel storage: with an oil boiler, for instance, you have to have the oil delivered to your home and stored in a large tank so it does not run out. With an ASHP, you have a constant supply of air outside and electricity from the grid.
  • Low maintenance: once it’s installed, your air source heat pump will work automatically; there’s no need for you to mess around with controls. Air source heat pumps also have few moving parts, so hardly a chance of anything breaking.
  • Long lifespan: you can expect your heat pump to run for 20+ years.
  • Precision: the heat pump is controlled by a thermostat and timers, so you can set the temperature you want and when you want your heating to come on.
  • Reduced Running Costs: the cost of running an air souce heat pump when compared to a traditional gas boiler is huge. View the air souce heat pump cost table in previous section.

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Case Study - Air Source Heat Pump Installation

Theydon Bois – New build

Here we see another installation of an ASHP (Air source heat pump) buffer vessel, and H/W high efficiency cylinder. These works are being undertaken to a high-end refurbishment project on behalf of the builder and clients. UFH (16mm barrier pipe supplied by The solar and heat on the ground floor, and stainless steel spreader plates on the 1st floor. 2 x manifolds, and a WiFi smart control room thermostat system. We also have 4.5kw of Solar PV on the roof, providing some 4380 kWh of useable electricity, almost completely offsetting the average daytime requirement of the heating system.


  • Total contract value – £25k inc vat
  • Days on site – 9

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