With no mechanical parts outside and a heat source that is almost constant throughout the year, GSHPs offer a robust, low-maintenance heating system.
They are cheap to run – typically offering efficiencies of 400 per cent – and have a lifespan of 25 to 30 years, compared to an average boiler’s lifespan of 10 to 12 years.
If you plan to install pipes underground, the area of land required is approximately 2.5 times the foot print of the building. If land is limited an affordable alternative is to sink boreholes to tap into the earth’s natural heat.
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Ground Source Heat Pumps (GSHP) extracts heat from the ground by circulating a mixture of water and antifreeze around a ground loop. Heat from the ground is absorbed into the fluid and then passes through a heat exchanger into the heat pump. Trenches are usually between 1-2m deep and boreholes between 15-100m, depending on energy needs. The longer the coil, the more energy it produces.
This heat can then be used for radiators, underfloor or warm air heating systems and hot water.
Installers need to be able to dig a trench for the ground loop. The length of the ground loop needed depends on the size of your property and the amount of heat you need. If space is limited, a vertical borehole can be drilled instead. We can assess your home and advise you as to the best option.
Since GSHP work best when producing heat at a lower temperature than traditional boilers, it's essential that your property is well insulated and draught-proofed for the heating system to be effective.
The system will pay for itself much more quickly if it's replacing an electricity or oil heating system.
GSHPs can perform better with underfloor heating systems or warm air heating than with radiator-based systems because of the lower water temperatures required.
Combining the installation with other building work can reduce the cost of installing the system.
GSHPs boast efficiencies of up to six times that of gas or oil boilers. They produce water at a lower temperature than boilers (55°C). Less cold water needs adding to baths or showers, which saves both money and energy.
The Renewable Heat Incentive (RHI) is Government incentive scheme to encourage the uptake of renewable heat technology among businesses and homeowners.
It covers a range of technologies, including ground to water heat pumps, air to water heat pumps and solar thermal panels. Air to air heat pumps, are not supported by RHI.
The Non-domestic RHI was launched first in November 2011 to provide payments to industry, businesses and public sector organisations. The Domestic RHI was launched in April, 2014, and is open to homeowners, private landlords, social landlords and self-builders.
RHI cash payments are made quarterly over seven years. The amount you receive will depend on a number of factors - including the technology you install and the latest tariffs available for each technology.
The noise of a typical heat pump is similar to that of a refrigerator. All our heat pumps are fitted with noise reduction systems. Pumps are best fitted in utility rooms, basements or even garages.
The ground temperature stays pretty consistent under the surface, even in the depths of winter, so the system works all year round.
Pure Renewables offers guarantees of up to five years and the system can operate for 25 to 30 years, with regular scheduled maintenance. They need very little maintenance as they use “fit and forget technology.”
They are generally allowed as permitted developments, but it’s always worth checking with the local authority before you incur any costs.