Air Source Heat Pump Efficiency

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Last updated: 05 February 2019

Information on Air Source Heat Pump Efficiency

As the effects of global warming are a growing concern, many households are looking for environmentally friendly alternatives to substitute already existing conventional heating and cooling solutions for the summer and winter months as they emit less carbon dioxide into the atmosphere, thus lowering one’s carbon footprint towards a greener and sustainable home. Thus, switching to or choosing to buy an air source heat pump (ASHP) is the right decision to make.  Not only are air source heat pumps environmentally efficient, they also provide other efficiency benefits.

With Greenmatch you are guaranteed the best quotes in helping you decide on the air source heat pump that is most suitable for you. All you have to do is fill in the form on the right to request offers. It’s free, it’s fast, and no obligation is necessary.

What Is an Air Source Heat Pump?

An air source heat pump is typically a system that works by transferring heat from the outside of a building inside. This generated heat is then used to heat radiators and underfloor heating systems. An air source heat pump can also be used to cool a building as well. Air source heat pumps work similarly to how refrigerators work whereby the refrigerator extract air from outside and then makes cool air inside. It has a refrigeration system that consists of a compressor and coil tubing for indoor and outdoor to aid in the heat transfer process.

In terms of efficiency, air source heat pumps prove to be a formidable competitor to the more traditional solid fuel heating systems and oil boilers.  Air source heat pumps are efficient because they use outside air instead of fuel sources such as gas, oil or liquid petroleum gas (LPG) to create heat in winter or cool air in summer within your home.

Although the majority of air source heat pumps depend on electricity as their main source of power, they can alternatively be driven using solar power or wind energy. Ideally, even though they commonly use electricity as an input source for power, the heat energy that is ultimately produced from air source pumps is greater than the amount of electricity they consume. As a result, the heat they produce can then be stored in hot water tanks for later use or used to power underfloor heating systems and also radiators within a home, building, or office space.

Find out more about air source heat pump efficiency below:

Types of Air Source Heat Pumps

When installing a heat pump in your home, etc, there are two main types one can choose from:

  • Air-to-air heat pumps: extracts heat from the outside air through fans to deliver cool air to your home during winter. In the winter it can air conditioning system in the summer, where the pump is reversed to provide cool air. They cannot provide hot water
  • Air-to-water heat pumps: distributes heat from the outside air through your wet central heating system. They are more efficient when temperatures are lower than standard boiler systems. They are great for underfloor heating systems and large radiators

Environmental Efficiency

Air source heat pumps are fantastic alternatives towards achieving a greener and sustainable home:

  • Low Carbon Emission: they provide a low carbon footprint in the environment thus reducing carbon dioxide emissions from 1,600 to 3,500 kg per year depending on the heating system you are switching from
  • Alternative Power Sources: they can be powered using solar power or wind energy
  • Heating and Cooling Alternative: air source heat pumps use less energy than conventional heating methods
  • Renewable Energy: consumption of non-renewable fuel sources is reduced
  • Low Temperatures: can be used in climates as low as -20ºC
  • Performance: the amount of energy they produce is measured using the Coefficient of Performance (COP)—this measures how many units of energy is produced from each unit of electricity consumed that is used to operate the system. Air source heat pumps produce up to 3 units of useful energy for every 1 unit of electricity consumed. Units are variable depending on the season and are much lower in winter than in the summer months.

Technological Efficiency

Air Source Heat Pumps

When looking at the efficiency of air source heat pumps, one must also think in terms of their design and how it benefits long term use:

  • Cooling and Heating System: air source heat pumps can both be used as a cooling and heating alternative depending on the time of year.
  • Easy Installation: as air source heat pumps are small in size, installation time is fast and takes only a few days.
  • Easy Maintenance: filters need to be changed once a month or as needed. Also, a professional technician should check the heat pump once every year to make sure everything is in order. They can be operated for up to 20 years or more
  • Heating Season Performance Factor (HSPF): rates the efficiency of the compressor and electric resistance elements, where having the highest HSPF is key in the winter.
  • Seasonal Energy Efficiency Ratio (SEER): rates the cooling efficiency of the air source heat pump. Air source heat pumps’ SEER is highest in summer.

Cost Efficiency


Purchasing an air source heat pump could save you thousands on your next utility bill:

  • Allowing for considerable tax and cost reduction benefits such as the UK’s Domestic Renewable Heat Incentive scheme (Domestic(RHI)), the Microgeneration Certification Scheme (MCS), and the Enhanced Capital Allowance (ECA)
  • Average costs of about £3,000-11,000 depending on the type of air source heat pump purchased, but running cost and installation costs vary
  • According to the Energy Saving Trust(EST), switching to an air source heat pump could save you (in an average four bedroom detached home)

       ♣ Around £295-425 a year if replacing gas (non-condensing)
       ♣ Around £360-555 a year if replacing oil (non-condensing)
       ♣ Around £1,200-1,805 a year if replacing LPG (non-condensing)
       ♣ Around £715-1,295 a year if replacing electric heating (old storage heaters)

  • Cheaper than conventional heating systems such as an oil boiler or gas boiler

Get Quotes on Air Source Heat Pumps

If you are interested in purchasing an air source heat pump but still have some doubts on which heat pump is right for you, we are ready to help you. Fill in the form on the right with your personal preferences and information, and we will provide you with quotes from up to four different suppliers of heat pumps. You are free to choose the offer that best satisfies your needs. This service is free, without obligation, and takes only a few minutes.