If you’re thinking about installing a heat pump, it’s worth considering underfloor heating at the same time. If your heat pump is part of a major renovation or even a new build, pairing it with underfloor heating is often the best approach for energy efficiency, heat-cost savings, and comfort. If you’re retrofitting, there are also some great low-profile options for underfloor heating too, which deliver the same benefits.
Both heat pumps and underfloor heating are designed to operate at low flow temperatures, which means your rooms are still warmed to the same temperature, but using a more efficient, lower flow rate through your heating system. The result is a gentle, consistent heat that keeps your home warm for longer, while maximising efficiency and therefore saving money on your bills.
Because neither underfloor heating nor heat pumps rely on high flow temperatures and instead prefer to run more slowly and steadily, they work together, naturally complementing each other to heat a room using less energy.
How Do Heat Pumps Work Compared to Gas Boilers?
Heat pumps work by extracting heat from the air or ground outside and transferring it indoors. They move and amplify existing heat, so they run steadily for longer periods, which is why they’re so efficient. Heat pumps often deliver up to four units of heat for every one unit of electricity used. In contrast, traditional boilers burn fuel to generate high temperatures quickly and cycle on and off. They typically use one unit of energy to deliver 0.9 units of heat.
Both systems can heat a room effectively, but a boiler allows the temperature to drop before turning back on, whereas a heat pump maintains a steady temperature.
Why Heat Pumps And Underfloor Heating Are Most Efficient at Lower Temperatures
The higher the flow temperature, the more energy is required to heat it. Boilers typically run at high flow temperatures of 60–70°C, making radiators very hot to touch. Heat pumps, on the other hand, operate at lower temperatures.
- With radiators, we often design heat pump systems at around 50°C flow temperature
- With underfloor heating, this can drop to around 40–45°C
However, the lower the temperature, the more surface area you need to heat a space effectively. This is why, when installing a heat pump with radiators, upgrades are sometimes required. For example, look at swapping a single-panel radiator for a double- or triple-panel unit.
Underfloor heating maximises this principle by turning the entire floor into a heat emitter. This allows a heating system to be designed with an even lower flow temperature, thereby working even more efficiently while still delivering the same level of warmth in a room.
The result:
- Higher efficiency
- Lower energy bills
- Reduced carbon emissions
- Improved overall system performance
Why Homeowners Choose Underfloor Heating
Underfloor heating is sometimes seen as a luxury, but it’s becoming increasingly common as a practical, modern heating solution.
Key benefits include:
- Superior comfort: no cold spots
- Steady, even heat: high thermal mass means heat is released steadily and takes longer to cool down
- Freeing up wall space: no radiators means more flexibility with layout and design
- Improved aesthetics: clean, minimalist interiors
- Quiet operation: no expansion noises or water flow sounds
- Energy efficiency: lower running temperatures reduce energy use, especially with heat pumps
Can Underfloor Heating Be Retrofitted?
Yes! Underfloor heating isn’t just for new builds. While traditional screeded systems are ideal for new builds or extensions, there are low-profile retrofit options that work well in existing homes, such as:
- Overlay systems – slim panels fitted over existing floors
- Routed systems – pipework installed into channels cut (dust-free) into existing floors
Why It Makes Sense to Plan Underfloor Heating With Your Heat Pump Installation
If you’re already considering a heat pump, it’s the perfect time to think about your heat emitters. Any good installer will carry out a full heat loss calculation to design a system tailored to your property. This determines the energy required to heat your home by considering the:
- Size of your home
- Quality of insulation
- Size of your windows
- Type of heating emitters (radiators or underfloor heating)
While there is an upfront investment, both heat pumps and underfloor heating are designed to deliver long-term savings. If your radiators need upgrading to work with a heat pump anyway, underfloor heating can become an even more attractive option. Choosing underfloor heating can improve overall system efficiency and potentially reduce the size of the heat pump you need.
Here To Help You Choose The Best Heating Solution For Your Home
Heat pumps and underfloor heating are built on the same principle: low-temperature, high-efficiency heating. Individually, they’re both excellent systems. Together, they create one of the most effective, comfortable, and energy-efficient heating solutions available.
If you’re planning a heat pump installation for a new build, renovation, or existing home, Cinergi are the experts you can trust for impartial advice and top-quality design and installation throughout the south of the UK. We’ll help you choose a system that provides energy efficiency, heating cost savings, and superior comfort.
