How It Works
The Energy Saver uses air-source heat pump technology. A heat pump is an electrical
device that extracts heat from one place and transfers it to another. The heat pump is not a new technology;
it has been used around the world for decades. Refrigerators and air conditioners are both common examples of heat pumps.
Heat pumps transfer heat by circulating a substance called a refrigerant through a cycle of
alternating evaporation and condensation. A compressor pumps the refrigerant between two
heat exchanger coils. In the outdoor unit coil, the refrigerant is evaporated at low pressure and absorbs
heat from its surroundings. The refrigerant is then compressed on its way to the indoor unit coil,
where it condenses at high pressure. At this point, it releases the heat it absorbed earlier
in the cycle.
A diagram of a heat pump:
1) condenser coil 2) expansion valve
3) evaporator coil 4) compressor
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This ability to absorb heat from the surrounding out-side air and send
that inside to heat up your house can be highly efficient. Air source heat pumps
can produce as much as 4.2 kW (kilowatt) of heating energy from 1 kW electricity supplied.
As a comparison an electric radiator produces exactly 1 kWh of heating
energy from 1 kWh supplied. The best condensing gas boilers produce
up to 0.8 kWh per kWh of gas supplied. An oil fired boiler delivers
similar efficiency.
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The efficiency decreases with lower temperatures for regular air source heat pumps because it is more
difficult to extract heat from cooler air.
The EHS Energy Saver is unique on the market as its heat performance falls less at cooler temperatures.
The figure on the left compares the Energy Saver with common market products.
Additional heating should not normally be needed even at lower temperatures. We had customers in Scotland using the
Energy Saver in the winter of 2009/10, which was the coldest for 30 years with temperatures of minus 16º C
and below, without any need for additional heaters.
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The Energy Saver has been proven to save users substantial amounts, often more
than £ 1,000 per year.
Please see our savings calculator for further info.
Contact: info@eheatgroup.com, 01628 566105
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