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Air Source Heat Pumps (ASHP)

How do they work?

Air source heat pumps absorb heat from the outside air, and will cover the heating and hot water requirements all year round.

An ASHP can extract heat from the outside air even when the outside temperature drops to as low as -15⁰c.

The heat absorbed is usually used to heat radiators, underfloor heating systems, or warm air convectors and hot water in your home.

This system does have some impact on the environment as it needs electricity to run, however the heat extracted from the ground, air, or water is constantly renewed natural Heat from the air is absorbed in to a fluid which is pumped through a heat exchanger in the heat pump.  Low grade heat is then extracted by the refrigeration system and, after passing through the heat pump compressor, is concentrated into a higher temperature capable of heating water for the heating and hot water circuits of the house.

Heat from the air is absorbed in to a fluid which is pumped through a heat exchanger in the heat pump.  Low grade heat is then extracted by the refrigeration system and, after passing through the heat pump compressor, is concentrated into a higher temperature capable of heating water for the heating and hot water circuits of the house.

Two main types of ASHP systems

• An air-to-air system

Air to air heater
 
Produces warm air which is circulated by fans to heat and cool your home.
• An air-to-water system

Heat is distributed via a wet central heating system. A heat pump is much more efficient at working at a lower temperature compared to a standard boiler system.

This type of system is more suited to underfloor heating systems or larger radiators, which give out heat at lower temperatures over longer periods of time.

Benefits of air source heat pumps

• Fuel bills are lower, especially compared to conventional electric heating
• Can lower your homes carbon emissions depending on the type of fuel you are replacing
• This system needs little maintenance and has a long life expectancy
• No fuel deliveries are required
• No need for flues or ventilation

This technology is proposed to be eligible for financial support under the Renewable Heat Incentive to be launched in June 2011.

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