Enviro Heating & Cooling Air source heat pumps
Air Source Heat Pumps
Air source heat pumps work like a fridge but in reverse, they extract heat from the outside air in the same way that a fridge freezer extracts heat from the inside. An outdoor electric powered fan unit extracts heat from the ambient air which is then sent through pipes. These pipes are filled with refrigerants which are warmed up by the air, the refrigerants are then turned into a gas. The gas is then passed through a compressor where the temperature is increased further. Once in the cylinder unit, the refrigerant is surrounded by cool water or air. The heat is then transferred to the water or air and then it is sent into the house through the radiator and hot water circuits. The refrigerant then cools back into a liquid and the process begins again.
Things to consider
During cold winter months the air temperature drops and air source heat pumps become less efficient. We would highly recommend installing an air source heat pump as part of a hybrid heating system, with a gas or oil boiler as back up for when the air source heat pump cannot meet demand. The heating system will then switch between the boiler and heat pump depending on which is more efficient.
Houses need to be well insulated and draught proof for air source heat pumps to work well, this can be difficult in older houses.
The outdoor fan unit needs to be installed outside your house on the ground or mounted onto a wall. Fans can be noisy and might disturb you or neighbours and so you will have to consider where to put it.
Do you have space for a cylinder unit inside? Are you able to install underfloor heating and larger radiators? Pipework may need replacing to increase the flow rate around the heating system.
Air source heat pumps can cost between £9,000 and £15,000 to install and ground source heat pumps between £20,000 and £25,000 to install.