If you're considering an air source heat pump for your home, one of the most important questions is how much it will cost to run.
Air source heat pump running costs depend on several factors, including your home's heat demand, electricity tariff, insulation, system efficiency and heating controls. There is no single annual cost that applies to every property.
In this guide, we explain how running costs are calculated and what you can do to operate your heat pump efficiently.
How Much Does an Air Source Heat Pump Cost to Run?
The running cost of an air source heat pump depends mainly on how much electricity it uses and the price you pay per unit.
A simple calculation is:
Annual heat demand ÷ seasonal efficiency × electricity unit price = estimated electricity cost
For example, if a home requires 12,000 kWh of useful heat annually and the heat pump achieves a seasonal efficiency of 3 (SCOP), it would use approximately 4,000 kWh of electricity.
At an illustrative electricity rate of 26p per kWh, this would equal approximately £1,040 per year, excluding standing charges and other household electricity use.
This is a worked example, not a guaranteed household running cost. Actual consumption will vary according to the property, weather, system performance and tariff.
What Affects Air Source Heat Pump Running Costs?
1. Home Insulation
A well-insulated property generally requires less energy to maintain a comfortable indoor temperature.
Roof insulation, external wall insulation, windows and draught reduction can all influence the building's heat demand. However, the suitability and potential impact of each improvement depend on the property.
2. Heat Pump Efficiency
Heat pump efficiency is often described using COP or SCOP.
- COP: Efficiency measured under specific operating conditions.
- SCOP: Seasonal coefficient of performance, which provides an indication of efficiency across a heating season.
A higher seasonal performance figure means the system delivers more useful heat per unit of electricity consumed under the relevant conditions.
Actual performance depends on the installation, outdoor temperature, flow temperature and heating requirements.
3. Flow Temperature
Flow temperature is the temperature of the water supplied by the heat pump to the heating system.
Heat pumps can often operate efficiently with lower flow temperatures when the property has suitable insulation and appropriately sized radiators or underfloor heating.
The system should be designed and configured to meet the building's heating requirements without relying unnecessarily on higher temperatures.
4. Electricity Tariff
Your electricity unit rate has a direct effect on running costs. Different suppliers and tariffs may offer different prices, including time-of-use options.
Before estimating annual costs, check your actual electricity rate rather than relying only on a general national average.
How Can You Reduce Heat Pump Running Costs?
There are several practical ways to support efficient operation.
Use Suitable Heating Controls
Correctly configured thermostats and heating controls can help the system respond to the property's heating needs. Avoid making frequent changes without understanding how your system is designed to operate.
Maintain Appropriate Flow Temperatures
The correct flow temperature depends on the system design, emitters and property. A qualified installer or heating professional can help check whether the settings are suitable.
Improve Insulation Where Appropriate
Reducing unnecessary heat loss can lower the amount of heat the property needs. Consider insulation improvements as part of a wider assessment of your home's energy performance.
Compare Electricity Tariffs
Review your electricity tariff regularly and compare available options. A tariff that suits your usage pattern may help manage electricity costs, but savings depend on the actual rates and terms.
Are Air Source Heat Pumps Cheaper Than Gas Boilers?
Not necessarily in every home.
A heat pump uses electricity, which generally costs more per kWh than gas. However, it can deliver multiple units of heat for each unit of electricity consumed.
The comparison depends on:
- Electricity and gas prices
- Boiler efficiency
- Heat pump seasonal efficiency
- Property heat demand
- Flow temperature
- Heating controls
A heat pump should be assessed based on the cost of delivering useful heat, rather than comparing electricity and gas unit prices alone. Running costs can vary significantly between properties and systems.
Frequently Asked Questions
How much does an air source heat pump cost per year?
There is no fixed annual figure. Costs depend on the property's heat demand, efficiency, electricity tariff and operating conditions. A personalised estimate is more useful than a general average.
Does insulation reduce heat pump running costs?
Improving insulation may reduce heat loss and the amount of heating required. The potential benefit depends on the building and the improvement being considered.
Do air source heat pumps run continuously?
Heat pumps may operate for longer periods at lower output rather than using the same short, high-temperature cycles as some conventional heating systems. The operating pattern depends on the system design and controls.
Can solar panels reduce heat pump electricity costs?
Solar panels may supply electricity for household use, including a heat pump. The amount of electricity used directly depends on solar generation, household demand, system controls and the time of use.
Explore Air Source Heat Pump Solutions at Infinity Solar UK.
Infinity Solar UK supplies Daikin air source heat pumps, including selected split and monobloc systems, alongside heat pump kits, hot water cylinders and accessories.
If you're researching an air source heat pump for your property, review the available products and specifications before choosing a system.
Final Thoughts
Air source heat pump running costs depend on the relationship between your home's heat demand, system efficiency and electricity tariff. Good system design, suitable insulation and appropriate controls can all support efficient operation.
For a more realistic estimate, use your property's heat demand and actual electricity rate rather than relying on a generic annual figure.