• Air Source Heat Pumps

Air source heat pumps are positioned outside, adjacent to the building, and have a fan that draws in outdoor air over a large heat exchanger which harnessing the heat energy in the air, even when temperatures are below zero. The captured energy is then transferred to the refrigerant, triggering the refrigeration cycle. Air source heat pumps usually consist of the external unit and an internal unit where hot water is stored and housing the controller and circulation pumps.

Benefits of an Air Source Heat Pump

Air source heat pumps provide the following advantages in addition to heat pumps in general:

  • The overall efficiency provides significant energy savings
  • Convenient and reliable
  • Minimal disruption during installation
  • Easy to retro-fit
  • Cost effective 

The installation of an air source heat pump can improve the overall efficiency of your heating system whilst also saving you money on your heating costs.

Different Types of Air Source Heat Pumps

At Heat Solutions we understand that different properties and clients may have different requirements for their heat pump installation. Therefore we are able to provide a range of air source heat pump systems to best suit you.

Not sure which type of system is the best suited? Our experienced engineers will be able to provide expert advice on the best solution to meet your needs.

Outdoor Air Source Heat Pump

The refrigeration cycle takes place inside the outdoor heat pump unit with a hot water flow and return into and from the building via insulated pipes delivering heating via a wet system and domestic hot water. There is also a fully integrated air source heat pump which is designed to be located indoors. Outdoor air is collected via a large duct through an external wall.

Split System Air Source Heat Pump

The refrigerant is heated across the heat exchanger in the outdoor fan unit and then passes inside the building where it is compressed in an indoor heat pump unit transferring heat to water for space heating and domestic hot water.

Air to Air Heat Pump

The refrigeration cycle takes place in the outdoor heat pump unit and hot gas (or cold gas when cooling) is passed inside to a fan convector mounted on the wall or in the ceiling. Hot or cold air is distributed into the room via the fan convector. Air to air heat pumps do not heat water and are not eligible for the RHI.

During operation, the fan contained within the external unit does omit some noise, therefore the location of the heat pump needs consideration – not located near bedrooms, for example. Having said that, higher quality units tend to be quieter. Also, when the heat has been extracted from the ambient air, cold air is expelled, which again requires some consideration in terms of locating the unit. Also, drainage needs to be considered under the external unit to take care of condensation from the heat exchanger. An air source heat pump is more efficient when ambient temperatures are higher, but it is important to look at the energy performance calculation for the year when doing comparisons with other systems.


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