There are ten key reasons to use Ground Source Heat Pumps:
1. Ground source heat pump installations have very low running costs because they exploit the fundamental characteristic of the ground to act as an efficient store of thermal energy. In very cold weather, when heating is most needed, a ground source heat pump has access to warmer temperatures from the ground than an air source heat pump has from ambient air.
2. The Thermal Energy Storage capacity of the ground allows GSHPs to be used efficiently at all hours of day and night – this provides the opportunity to use GSHPs at night when electricity is cheaper.
3. GSHPs do not suffer the problems of "intermittency" that effect renewable energy from wind turbines, photovoltaic cells or solar thermal panels. Indeed the Thermal Energy Storage capacity of the ground can be used to compensate for the intermittent supply of energy from other renewable sources.
4. Ground Source Heating provides one of the most economic routes to providing on-site renewable heating, reducing emissions of greenhouse gases and meeting the government's binding targets on renewable energy.
5. Although ground source energy requires upfront investment, the reductions in emissions of greenhouse gases are very great and an investment in ground source energy lasts much longer than other investments in renewable energy. The ground works installed for ground source systems, a major part of the cost, can be expected to last for over 50 years. The ground source heat pumps themselves are very reliable pieces of equipment with a long life – longer than air source heat pumps which have to be located outside, have more moving parts, including air circulation fans, and need to incorporate energy-consuming defrosting elements to contend with the formation of ice in winter. GSHP installations compare favourably with all other forms of Renewable Heating and all other mechanisms for generating Renewable Electricity in terms of life span.
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