Overview

Heat is widely available in the ground, and also in the air around your house. These natural sources of heat are constantly replenished by the sun, wind and rain. A heat pump system will harness these free and renewable energy sources for heating your house and supplying hot water at a very low cost. The role of the heat pump is to pump us heat from a low temperature source, for example the ground under your lawn and release it at a higher temperature into your central heating system.

Heat pumps are very economical, for every unit of electricity used to power the heat pump, 3 to 4 units of heat are generated. They work best with low temperature heat distribution systems e.g under floor heating systems. They are most efficient when used at night. A buffer store is required to maximise efficiency as this allows the heat pump to store heat on a constant basis, releasing it when it is required.

Sizing and Design

A Heat Pump is sized by:

1. Determining heat loss of your home

2. Determining the heating design temperature for your area

3. Determining the capacity of the selected heat pump

4. Subtracting this capacity from capacity required for your home

When installing a heat pump into an existing dwelling it is critical to ensure that a building is already sufficiently insulated and the existing heating system is compatible. If insulation levels are inadequate then the heat pump will not be as efficient as it could be.

The existing system will also need to be surveyed to ensure that all radiators are compatible for use with the heat pump.

Ground Source Collector- The collector is used in a closed loop system to transfer the heat from the ground to the house. The design and installation of this collector is important to operate efficiently. It is important not to landscape or plant any trees or shrubs in the vicinity of the collector areas as the roots can interfere with the operation of the heat pump. Tests will also be carried out on the soil in order to establish the most suitable collector type (vertical, horizontal)

Equipment

A-Rated Energy are suppliers and installers of the Isara geothermal system. A geothermal system is composed of pipes buried outside your home ( a closed horizontal or vertical circuit in which an antifreeze mix circulates or by pumping water from the ground), an internal circuit and a heat pump linking the two circuits.

Workings of a Geothermal Heatpump (Horizontal System)

1) The tubes are laid horizontally 1 metre deep. Those tubes made of polyethylene or copper are pressurised and filled with an antifreeze mix.

2) The Circuit pumps up the water from the ground. The heat pump gets the energy contained in the water which is at constant temperature all year round.

3) Tubes are installed into 50mm to 80mm deep drillings. Those tubes are pressurised and filled with antifreeze mix. They recover the heat deep down through the antifreeze fluid circulation.

Costs and Payments

A-Rated Energy price all work on a per client basis. Pricing terms and conditions vary on the service provided.

After Sales Service

In recognition of the importance of having a first rate back up service, we have invested heavily so that our customers have access to unrivalled levels of back up service. All products offer extensive manufacturer warranties.