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What are air source heat pumps?

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Low carbon tech

Air source heat pumps (ASHPs) are a low-carbon technology that provides efficient heating and cooling solutions for homes in any climate.

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Summer and Winter Heating

Air source heat pumps (ASHPs) transfer heat from the outside air using electricity to provide both heating and hot water in some models (air to water heat pumps) during the winter. However, they can reverse this process to offer cooling in the summer.

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Energy Efficiency

Installing an ASHP can lead to lower utility bills and increased energy efficiency compared to conventional heating technologies. While generally considered environmentally friendly and a viable option for most projects, their efficiency can decrease in very hot and cold climates.

Air source heat pump benefits

ASHPs use outside air to heat or cool homes with high efficiency, using 1 unit of electricity for 3-4 units of heat. Combining a heat pump and solar panels together can make the system the most sustainable form of heating.

Switching to air source heat pumps can significantly reduce your annual electricity bill.

ASHPs can provide heating in winter and cooling in summer.

ASHPs can heat water and spaces, with flow temperatures of 60°C for hot water and 35°C for space heating.

ASHPs require annual servicing by a qualified heating engineer.

ASHPs can operate for up to 15 years with proper maintenance, and most have 5-year warranties.

ASHPs run on electricity and can be integrated in a new or existing solar PV system.

Air source heat pump disadvantages

ASHPs lose efficiency below 0°C and above 35°C due to fluctuations in outside air temp, with heat output decreasing as temperature drops and cooling output decreasing as temperatures rise.

ASHPs can be somewhat noisy, comparable to an air conditioner or light to heavy rain.

ASHP’s need to be installed outside, or ducted from internal plant rooms, requiring louvres and sound attenuation, adding cost to potential projects.

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