Heat Pump and Underfloor Heating: Complete Guide
Underfloor heating and heat pumps are the perfect pairing — UFH runs at 25-35°C where heat pumps achieve their highest efficiency, delivering COP values of 4.0-5.0 and the most comfortable, even warmth possible. Here is everything you need to know about combining them.
Underfloor heating operates at the lowest flow temperatures of any heat emitter, making it the most efficient partner for a heat pump. For comparing UFH with radiators, see our comparison guide. For the broader radiator picture, see our pillar: do I need new radiators?
Why UFH Is Ideal for Heat Pumps
The large surface area of the entire floor means heat can be delivered at very low water temperatures while still maintaining comfortable room temperatures of 20-22°C.
Wet UFH Systems Explained
Wet (hydronic) UFH systems circulate warm water through pipes embedded in or laid on top of the floor. The heat pump connects to a manifold that distributes water to individual room circuits. See our wet UFH systems guide for technical details.
Zone Controls
Each room or area has its own circuit and thermostat, allowing independent temperature control. This works well with heat pump zone control systems for maximum efficiency and comfort.
Retrofit Options
Retrofit overlay systems add 15-25mm to floor height and can be installed on top of existing floors. Screeded systems offer better performance but need more depth. Both connect to the heat pump in the same way. Mixing UFH with radiators is common.
Costs
| UFH Type | Cost per m² | Typical Whole-House |
|---|---|---|
| Overlay (retrofit) | £40-£70 | £3,000-£5,000 |
| Screeded (new build/renovation) | £30-£50 | £2,500-£4,000 |
| Ground floor only | £30-£50 | £1,500-£3,000 |
Combining UFH with solar panels delivers the ultimate in low-carbon, low-cost home heating.
Frequently Asked Questions
What flow temperature does UFH need?
25-35°C — the ideal range for heat pump efficiency with COPs of 4.0-5.0.
Can I add UFH to an existing property?
Yes, most practically during renovations. Overlay systems add 15-25mm to floor height.
How long does UFH take to heat up?
2-4 hours for screeded, 30-60 minutes for overlay. Best with continuous heating schedules.
Underfloor heating with heat pumps is the most efficient heating combination available. Connects to emitter choices, installation, and running costs. Add solar panels for near-zero running costs.