Air to Air Heat Pumps – Compare Offers from Local Installers in the UK
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Last updated: 06 May 2021

Choosing The Right Air to Air Heat Pump

Start Saving with an Air to Air Heat Pump

Apart from being an innovative and environmentally friendly technology, the air to air heat pump will prove good value for your money. The low installation and maintenance costs make it a perfect choice for those who are looking to save on heating and electricity bills (in the summer) without undermining the heat efficiency aspect.

So, if you're are looking to:

  • Save a few pounds or more;
  • Lead an eco-conscious lifestyle;
  • Improve your house heating capabilities.

Then an air to air heat pump is something worth considering.

In order to help you decide the type of air to air heat pump that will be most suitable for your home, we invite you to fill in the form on this page with your personal preferences and information, and we will provide you with up to four different suppliers of heat pumps.

What Is an Air to Air Heat Pump?

The growing popularity of renewable energy sources has spurred the nowadays folk to be more eco-conscious, a trend that is reflected by a continuous endorsement of the alternative energy technologies for meeting the daily household needs. One of the so-called ‘green know-how’ devices that currently enjoys a growing interest from customers (homeowners, ‘green’ advocates, businesses) is the air to air heat pump. This innovative household appliance is gradually becoming the heating system of choice not only for the homeowners that are concerned with environmental sustainability but also for those who are looking to get a cost efficient heating as well.

The interactive graphic below illustrates how the process works. You can click each point to read about the steps in more detail:

1 1: An outdoor unit draws in heat from the ambient air with fans, and then blows it over a heat exchanger coil. 2 2: The heat is transferred to a cold coolant flowing in the coil. Due to its very low boiling point, the heat only turns the coolant into a slightly warm vapour. 3 3: The slightly warm coolant vapour passes through a compressor that increases its temperature and compresses it to a denser vapour. 4 4: This hot coolant vapour is then transferred to the indoor unit(s) through internal piping systems. 5 5: The indoor unit blows out the heat from the coolant to the indoor air with fans, thereby warming up the room. 6 6: Once the coolant has transferred some of its heat to the air, it cools back into a liquid. 7 7: The liquid coolant passes through an expansion valve, which forces it to let go of more of its heat and mix with air, thereby creating a liquid vapour mixture. 8 8: The cold liquid vapour coolant mixture is then circulated back to the outdoor unit, to be heated again.
ASHP for Heating

The air to air heat pump is part of a broader spectrum of heat pumps (ground source, air source, air to water), pertaining to the air source heat pumps category. It is worth mentioning that the air heat pump is proving one of the most efficient compared to its ‘siblings’, mainly due to low installation and maintenance costs, ability to deliver a coefficient of performance that is equal or above 3 and by being able to control the room temperature levels in an autonomous fashion.

Read more: Heat Pumps

Air to Air Heat Pump

Modern air to air heat pumps are capable of extracting heat even from the cold air masses outside your house, since, as strange as it sounds, the cold air contains a certain amount of heat too. In other words, the heat tends to be transferred from warm to cold objects due to its physical properties. What we are left to do is to take advantage of this natural phenomenon, and use it for our own good. One can easily test it by placing outside an object whose temperature is lower than the one of the environment it is placed in. In this case, the cold object will inevitably start absorbing heat from the surrounding air masses (whereas these are warmer than the object itself), following the thermal transfer principle employed in the air to air heat pump.

Choosing the Right Air to Air Heat Pump

Before rushing out to buy an air to air heat pump, it is important to consult with a certified heating engineer. Only after carrying out the right calculations in terms of how much heat your property will require will you be able to select the air heat pump that will correspond to these heating needs, and then you can proceed with purchasing the pump.

Many experts believe that the most profitable method to ensure a comfortable microclimate for one’s home is to combine heating with air cooling, something that an air to air heat pump is able to deliver. This will save on the equipment and on the acquisition of air conditioners. What makes this pump user-friendly, in addition to its autonomous control of the temperature levels, is the possibility of installing the pump’s external unit in various places, from outer walls to roofs and even balconies.

Calculating Tariffs

How to Perform the Right Calculations

As noted above, the selection of the right heat pump is a complex and scrupulous process involving a number of calculations that will account for the property’s heating necessities and determine the required air heat pump’s heating capacity to meet these needs on a daily basis. The first step is to determine the rate of the building’s heat losses. This rate can be calculated by using the following formula:

Q = S*(t int. – t ext.)*(1+Σ*β)*n/Rr


S” is the walls’ surface

t int.” is the indoor air temperature

t ext.” is the outdoor air temperature

β” is the coefficient measuring the impact of the surrounding environment

n” - additional heat losses

Rr” - thermal resistance

The resulting data will be used for calculating the property’s total heat losses on the basis of which the annual energy consumption will be established. Next, one should calculate the time it takes for a pump to heat a designated area and the electric power it consumes while doing so. These calculations will help you choose the air to air heat pump that is right for your home.

Get Quotes on Air to Air Heat Pumps!

If you have decided to purchase an air source heat pump, but you are not sure which type you would like, we are ready to help you. Fill out the form on this page with your personal preferences and information, and we will provide you with up to four different suppliers of heat pumps. You are free to choose the offer that best suits your needs. The service is free, without obligation, and takes only a few minutes.