What does an air source heat pump installation cost include?

An air source heat pump installation price covers more than the outdoor unit. It should account for the design work, equipment, labour, property alterations, electrical requirements, commissioning and any grant administration needed for the proposed system.

The largest cost differences usually come from the property itself. A heat-loss assessment shows how much heat each room needs and helps determine the heat pump size, radiator output, pipework and hot water capacity. An oversized system can cost more than necessary, while an undersized one may struggle in cold weather.

For an older house, we look at the existing emitters rather than assuming every radiator needs replacing. Some may provide enough heat at the lower flow temperature used by a heat pump. Others may need upgrading, and narrow or poorly insulated pipework may need attention so water can circulate properly.

• Survey and design: room-by-room heat-loss calculations, radiator checks, hot water requirements and the proposed control strategy.
• Equipment: the outdoor heat pump, hot water cylinder, circulating components, valves, sensors and controls required for the design.
• Installation: removal or isolation of unsuitable equipment, connection to the heating system, pipework alterations and the work needed to position the new equipment.
• Electrical work: a check of the supply, protective devices, cabling and consumer unit. Any upgrade is identified before the installation begins rather than appearing as an unexpected extra.
• External work: the base or supports for the outdoor unit, wall penetrations, condensate drainage and any trenching or access work needed at the property.
• Testing and handover: balancing, checks on controls and temperatures, commissioning records and guidance on using the system efficiently.

The outdoor unit’s position can affect the price. A straightforward wall or ground location may need little additional work. A listed building, barn conversion or property with limited access may require a different route for pipework, drainage or cabling. We identify those constraints during the survey and show them in the written quotation.

Electrical capacity is another part of the assessment. The heat pump needs an appropriate supply and protection, and the existing consumer unit may need changes. The same check can identify whether planned additions, such as an EV charger or battery, should be considered at the same time. Combining related electrical work can avoid opening up finished areas twice.

The quotation should separate essential installation work from optional improvements. For example, replacing a radiator that cannot meet the room’s heat requirement is different from replacing one for appearance. The price should also make clear whether making good, removal of old equipment and any external groundworks are included.

Grant eligibility is assessed against the property and installation, not simply added as a standard deduction. As an MCS-certified installer, we can make a Boiler Upgrade Scheme application on your behalf when the project meets the current requirements. The quotation should show how any approved grant affects the amount payable and what happens if the application is not eligible.

MCS certification also means the completed installation can meet the requirements for the Smart Export Guarantee where electricity export applies. That is separate from the installation price, so the quotation should not treat future export payments as an assumed saving.

Running costs are not fixed by the installation price alone. They depend on the heat loss of the house, the electricity tariff, the weather, the flow temperature and how the controls are used. We can explain those factors at handover, but a sensible estimate comes from the design for the individual property rather than a headline figure.

A useful quotation therefore gives you more than a single total. It should describe the equipment, the work included, any changes needed to radiators, pipework or electrics, grant assumptions, exclusions and the expected payment stages. We provide a written quotation before work starts, so you can compare the actual scope rather than comparing equipment prices in isolation.