Skip to content
Air Source Heat Pumps (ASHPs) are becoming an increasingly popular heating solution for homes worldwide, offering energy efficiency and sustainability. If you’re considering one for your home, here are the answers to some of the most frequently asked questions about ASHPs.
1. How Do Air Source Heat Pumps Work?
ASHPs extract heat from the outside air and transfer it indoors to heat your home and water, even in sub-zero temperatures. They operate like a refrigerator in reverse, using a refrigerant and a compressor to transfer heat.
2. Are Air Source Heat Pumps Suitable for All Homes?
ASHPs are most effective in well-insulated homes, as this minimises heat loss and improves efficiency. If your home is older or poorly insulated, additional insulation may be necessary to get the most out of the system.
3. What Are the Installation Costs for a Heat Pump?
The cost of installing an ASHP typically ranges from £7,000 to £13,000 in the UK. Costs depend on your home's size and specific heating needs. However, grants such as the Boiler Upgrade Scheme (up to £7,500) can significantly reduce these expenses.
4. Do Air Source Heat Pumps Require Planning Permission?
In most cases, ASHPs are considered "permitted development" in the UK, provided they meet certain criteria, such as size limits and noise regulations. Always check with your local council to ensure compliance. As of 2025, permitted development is no longer required for heat pumps.
5. How Efficient Are Air Source Heat Pumps in Winter?
Modern ASHPs are designed to perform well in winter, even in temperatures as low as -20°C. Correct sizing and professional installation are key to ensuring optimal winter performance.
6. Are Air Source Heat Pumps Noisy?
Many ASHPs are designed to operate quietly, often featuring anti-vibration technology. Look for models with certifications like the Quiet Mark, which guarantees low noise levels.
7. How Long Do Heat Pumps Last, and What Maintenance Is Required?
With proper care, ASHPs can last 10–15 years. Regular maintenance, such as annual servicing, ensures efficient operation and prolongs the system’s life.
8. What Size Air Source Heat Pump Do I Need?
The size of your ASHP depends on a heat loss calculation, which factors in your home's size, insulation quality, and heating demands. Installers will conduct this calculation to recommend the best fit.
9. Are Air Source Heat Pumps Environmentally Friendly?
Yes, ASHPs transfer rather than generate heat, consuming less energy and emitting fewer greenhouse gases compared to traditional systems. They are an excellent choice for reducing your carbon footprint.
10. Do I Need a Backup Heating System with a Heat Pump?
Most homes don’t require additional heating when using an ASHP. However, in larger or poorly insulated properties, a hybrid system combining an ASHP with a traditional boiler may be beneficial.
Why Consider an Air Source Heat Pump?
ASHPs are an environmentally friendly and efficient way to heat your home. They can lower energy bills, reduce emissions, and increase comfort year-round. However, they require careful planning and professional installation to maximise their benefits.
If you’re still unsure whether an ASHP is right for you, consult a certified installer for a detailed assessment of your property.