Water source heat pumps

Water source heat pumps can be used to provide heating in homes near to rivers, streams and lakes. They are similar to Ground Source Heat Pumps and pool cleaning service except that the ground loop is immersed in water.

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Closed or Open Loop

The loop can either be closed, as it is with the ground source heat pump, or it can be open, where the source water itself circulates into the pump. Open systems are generally thought to be more efficient, but need more maintenance.

Installation

You will need a large lake or river near by. Installation can be costly as you may well need to drain the lake or involve divers.

Savings

The savings can be considerable – Castle Howard, a baroque stately home in Yorkshire installed a water source heat pump at a cost of £185,000 (but with grants and interest free loans totalling £120,000). The expected annual heating bill when using oil was £80,000, however after a year using the heat pumps the electricity bill was only £14,000. It is very likely that the savings in your home will be more modest, assuming your home is more modest; in the same region of the savings from of a Ground Source Heat Pumps and pool cleaning service.

The Department for Energy and Climate Change (DECC) have announced that the Renewable Heat Incentive is expected to be launched in Summer 2013.

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FAQs

Can a ground source heat pump be used with underfloor heating?
Underfloor heating is a great choice for use with a ground source heat pump, but large radiators or a mix of both can be used for distributing heat around your home. Heat pumps produce a lower temperature heat than conventional boilers, therefore they are far more effective if used with a larger surface heating distribution system such as underfloor heating or large radiators. A good rule of thumb is that if used with heat pumps, the radiators should be around 30% larger compared to the size of radiator that would be used with a conventional boiler.
Can I heat a swimming pool using a ground source heat pump?
Yes, a system can be designed purely for your pool, be it indoor or outdoor, and if required it can form a heating and hot water system for the whole of your property.
Can a ground source heat pump be installed in an old building?
You can install ground source heat pumps in old buildings, and there are lots of examples of this being done. The design phase is very important as there are lots of issues to overcome in older buildings, especially if it is listed.
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