Ground Source Heat Pumps

Worcester Greenstore GSHP LECP System InsituGround source heat pumps (GSHPs) use pipes which are buried in the garden to extract heat from the ground. This heat can then be used to heat radiators, underfloor or warm air heating systems and hot water in your home.

A ground source heat pump circulates a mixture of water and antifreeze around a loop of pipe, called a ground loop, which is buried in your garden. Heat from the ground is absorbed into the fluid and then passes through a heat exchanger into the heat pump. The ground stays at a fairly constant temperature under the surface, so the heat pump can be used throughout the year.

The length of the ground loop depends on the size of your home and the amount of heat you need. Longer loops can draw more heat from the ground, but need more space to be buried in. If space is limited, a vertical borehole can be drilled instead.


Air Source Heat PumpsWorcester-Greensource-Air-to-Air-Heat-Pump-Insitu_web

Air source heat pumps absorb heat from the outside air. This heat can then be used to heat radiators, underfloor heating systems, or warm air convectors and hot water in your home.

An air source heat pump extracts heat from the outside air in the same way that a fridge extracts heat from its inside. It can get heat from the air even when the temperature is as low as -15° C. The heat they extract from the air is constantly being renewed naturally.

The benefits of heat pumps
SWPSL_renew Lower fuel bills, especially if you are replacing conventional electric heating
SWPSL_renew Potential income through the UK government’s Renewable Heat Incentive (RHI)
SWPSL_renew Lower home carbon emissions, depending on which fuel you are replacing
SWPSL_renew No fuel deliveries needed
SWPSL_renew Can heat your home as well as your water
SWPSL_renew Minimal maintenance required


Unlike gas and oil boilers, heat pumps deliver heat at lower temperatures over much longer periods. During the winter they may need to be on constantly to heat your home efficiently. You will also notice that radiators won’t feel as hot to the touch as they might do when you are using a gas or oil boiler.


For more information on how South West Plumbing can help reduce your heating and energy costs, call our office on 01803 615000 and our helpful staff will be pleased to make an appointment for someone to visit your property to discuss your requirements, or email us at and we will get back to you.


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