High-efficiency systems

products 1


Heat pumps – A full range of heat pump options is available from ET Clark & Son. From ground source to air source, ET Clark & Son can specify the correct heat pump model for your project. Heat pumps work by extracting the inexhaustible free supply of solar energy stored naturally either in the ground, air or water and utilizing it for domestic heating and hot water. Solar energy in this form is an unlimited resource that produces no harmful emissions and requires no transportation or supply pipelines. In a well-insulated property, every 1 kilowatt of electricity used to power the heat pump can provide up to 4 kilowatts of free energy. This ratio is referred to as the Coefficient of Performance or CoP, in this case the CoP would be 4. Looking at it another way, a CoP of 4 means the efficiency of the heat pump is 400%. Compare this to a boiler at 90% efficiency and the advantage is clear.

Air source heat pumps - are often a practical alternative, as they require no digging or drilling and fewer plumbing connections are used during installation, making them cost effective to install. The units extract energy from the air and will operate in temperatures down to -20˚C. Inevitably the CoP for air source units will be slightly lower than for ground source heat pumps, however they will still make a considerable contribution to reducing energy consumption by up to 50% when compared to conventional boiler systems.

Underfloor heating - works by pumping a controlled flow of warm water from any heat source through plastic tubing embedded in the floor. Because the emitting area is large, sufficient warmth is provided even on a cold winter day with no need for supplementary heating and there is also an underfloor system specifically designed for retrofit situations where existing ceiling heights may have been the reason for not pursuing an underfloor heating system.


Exhaust air heat pumps - extract the latent energy from the internal air of a property and use the recovered heat to recharge both the underfloor heating and domestic hot water. In doing so they also provide a means of controlling ventilation within the dwelling. The exhaust air unit is best suited to apartments and smaller houses with low heat loss and will often provide an excellent solution for housebuilders wanting to meet the requirements of The Code for Sustainable Homes.