Radiators vs Underfloor Heating: Which Works Better with Heat Pumps?

Heat pumps are becoming an increasingly popular alternative to traditional boilers, however many homeowners wonder: will they work with existing radiators, or should they switch to an underfloor heating system? Here we explain how both options work with heat pumps so that you can make the right decision for your home.

How heat pumps work with radiators

Heat pumps operate at lower water temperatures (35–55°C) compared to gas boilers (70–80°C). Standard radiators can still be used, however to provide the same level of comfort they may need to be larger or upgraded. Modern low-temperature radiators are designed specifically for heat pump systems. This option is best suited for homes where upgrading is easier than installing underfloor heating.

How heat pumps work with underfloor heating

Underfloor heating systems operate at very low flow temperatures, making them an ideal partner for heat pumps. They provide consistent and even heat across the entire floor area and are especially well suited for new homes, extensions, or major renovations, as installation causes less disruption. Energy efficiency is generally slightly higher than with radiators.

Key considerations

Cost: Upgrading radiators in an existing home is usually cheaper than installing underfloor heating.
Disruption: Underfloor heating often requires lifting floors — this is easier to implement in new builds or during renovations.
Comfort: Radiators heat the air, while underfloor heating provides radiant heat that feels cosier and more evenly distributed.
Space: Radiators take up wall space, whereas underfloor heating is hidden and offers more design freedom.

Which should you choose?

If you are upgrading an older home and want minimal disruption, it makes sense to stick with radiators. If you are building a new home, renovating, or aiming for maximum efficiency and comfort, choose underfloor heating. In some homes, a combination of both is possible — underfloor heating on the ground floor and radiators on upper floors.

Conclusion

Both radiators and underfloor heating can work efficiently with a heat pump — the right choice depends on your home, budget, and lifestyle. At Warmaway, we tailor every installation to your property to ensure you achieve maximum performance and comfort.