Underfloor Heating vs Radiators for Heat Pumps
Underfloor heating runs at 25-35°C — the sweet spot for heat pump efficiency. Radiators need 40-50°C. That 15°C difference can save 10-20% on electricity bills, but retrofitting UFH costs £3,000-£8,000. Here is how to decide what works for your home.
Both work well with heat pumps, but they offer different benefits. See our pillar: do I need new radiators?
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Efficiency Comparison
| Factor | UFH | Radiators |
|---|---|---|
| Flow temperature | 25-35°C | 40-50°C |
| Typical COP | 4.0-5.0 | 3.0-4.0 |
| Heat distribution | Excellent | Good |
| Response time | Slow (2-4h) | Faster (30-60 min) |
Cost Comparison
Comfort
UFH provides even heat with warm floors and no cold spots. Radiators create localised warmth. Both are comfortable when correctly designed.
Mixing Both Systems
Mixing UFH and radiators is common and effective. Combining with solar panels further reduces running costs.
Frequently Asked Questions
Is underfloor heating more efficient with a heat pump?
Yes. Lower flow temperatures mean higher COP and 10-20% less electricity.
Can I mix underfloor heating and radiators?
Yes. Ground floor UFH with upstairs radiators is popular and effective.
How much does retrofit UFH cost?
£3,000-£8,000 depending on area. Most practical during renovations.
Choosing between UFH and radiators affects efficiency and comfort. Connects to radiator sizing, installation, and running costs. Solar panels further reduce costs with either option.