A practical look at combining these two systems in Devon and Cornwall homes.
Combining an air source heat pump with underfloor heating is one of the most popular heating solutions in new builds and renovations. When designed correctly, the two systems work very well together. However, it’s not automatically the best choice for every home.
Heat pumps are most efficient when producing lower temperature water. Underfloor heating is designed to work well at these lower temperatures (typically 35–45°C), unlike traditional radiators which often need hotter water.
Heat rises gently from the floor, creating a very even temperature throughout the room. Many people find this more comfortable than heat coming from radiators on the walls.
Running a heat pump at lower temperatures generally improves its efficiency (SCOP). This can help reduce running costs compared to using the same heat pump with oversized radiators.
This combination is well suited to current and future energy efficiency standards and grant schemes, making it a relatively future-proof choice for many homes.
The biggest factor in real-world performance is how well the system is designed. The heat pump must be correctly sized, and the underfloor heating must be designed to work at low temperatures. Poor design is the most common reason for disappointing results.
Good insulation (especially below the heating pipes) allows the system to run more efficiently. In older properties, improving insulation is often just as important as the heating system itself.
Combining both systems increases the overall cost compared to installing a heat pump with radiators. However, many homeowners feel the improved comfort and efficiency justify the extra investment.
Heat pumps usually require a larger hot water cylinder than a gas boiler. This needs to be planned for early in the project, especially in renovations where space can be limited.
Use our Combined Estimator to see realistic costs and performance when installing both systems together.
Try the Combined Estimator