Air Source Heat Pump Systems

High efficiency renewable energy heating systems.

From initial client brief and systems design to hand over, the whole process will be professionally managed.

A typical air source heat pump

Whatever your mechanical services needs from simple ventilation to fully comprehensive systems including ground and air source heat pumps Andrew Engineering can turn your requirement into reality.

Either working from a full client specification or an open statement of requirement, Andrew Engineering will bring the experience necessary to ensure the optimum system selection.

Andrew Engineering can tailor an individual solution to meet the requirements and provide energy efficient solutions for your environment.

Andrew Engineering design and build systems using equipment from major manufacturers, yet remain completely independent.

Choice of equipment is based upon consideration of all the factors involved to achieve the best solution for the customer.

"Renewable And Sustainable Energy Technology."

Air source heat pumps provide a renewable and sustainable energy technology for building space heating.

Air source heat pumps take heat from the air using a condenser (the same as an an air conditioning condenser). The extracted heat is generally used for space heating. It can also be used to heat hot water.

All heat pumps are best suited to well insulated (well insulated means in excess of current UK regulations) new buildings. Air source heat pumps are generally easier to install than ground source heat pumps to retro-fit to existing buildings.

Air source heat pumps can work in reverse cycle to provide cooling. Air source heat pumps work well with traditional indoor air conditioning units or with underfloor heating.

Wall-mounted unit

Underfloor heating - Learn more..

Air Source Heat Pumps benefits compared to a Ground Source Heat Pump:

Lower capital cost
No additional external heat transfer equipment
No ground works
Lower installation costs

Air source heat pumps are generally easier to install than ground source heat pumps are to retro-fit to existing buildings.

Outdoor units can be sited in an appropriate position to suit the location. Ideally this should be close to the heat distribution system to minimise heat losses and costs. Air flow to the outdoor unit must not be restricted although the units can be concealed behind screens or fencing provided there is sufficient space for airflow in and out.

Air Source Heat Pumps in Existing Properties:

If the heat pump is being fitted to a completely new heat distribution system, e.g. Underfloor heating, then the systems will be designed to work together. If the requirement is to connect the heat pump to existing systems, e.g. Radiators, then there are likely to be issues which need to be addressed:

Radiator sizing to suit lower flow temperatures
It should be a pressurised system
Microbore pipework is not suitable
Flushing and cleaning of the existing system

Air source heat pumps can work in reverse cycle to provide cooling. However the cooling capacity would be limited with either radiators or underfloor systems due to the risk of condensation. Air to air fan coil units provide the best solution if cooling is required.

Air Source Heat Pump System

Wall-mounted unit

All heat pumps can provide pre-heating of domestic hot water before using a secondary source to raise the temperature to the desired level. Note it is not necessary to store hot water at a constant 60°C but this temperature should be reached periodically to prevent legionella.