Do I Need Underfloor Heating for an Air Source Heat Pump?

It’s a question we hear all the time: “Do I have to install underfloor heating if I want an air source heat pump?” The short answer? No, but it can make your system even more efficient. A well-designed air-to-water heat pump works fantastically just as well with radiators, provided they’re the right size and output for your home. In this guide, we’ll explain how heat pumps pair with different heating systems, the pros and cons of underfloor heating, and how to decide which option is right for you — without wasting money or compromising comfort. By the end, you’ll know exactly what works best for your home, your budget, and your winter warmth.

How Air Source Heat Pumps Work with Different Heating Systems

An air-to-water heat pump transfers heat into water, which is then circulated through your home’s heating system. The good news is that the system doesn’t have to be connected to underfloor heating.

Radiators: If you already have radiators, your heat pump will work with them — but they may need to be upgraded to higher-performance radiators. This is because heat pumps work best at lower flow temperatures than gas boilers, so larger or more efficient radiators mean you can heat a room using lower water temperatures, which means less energy is used to achieve the same warmth.

Underfloor Heating: Underfloor heating enhances efficiency with heat pumps, as it is designed to operate at low temperatures and covers a large surface area. That means you get some extra savings on running costs. 

Mixed Systems: Many homes run a mix — underfloor heating downstairs for consistent warmth, radiators upstairs for quick heat. It’s often the best of both worlds.

For a full breakdown of how system design impacts performance, check out our Essential Guide to Air Source Heat Pump Installation. - This has nothing to do with UFH. Surely an article about UFH would make more sense? 

Pros and Cons of Underfloor Heating with Heat Pumps

Pros

• High Efficiency – Able to warm rooms using lower flow temperatures, maximising efficiency and reducing running costs.

• Even Heat Distribution – Covers a large area, so your home stays warm from the ground up without cold spots.

• Comfort & Aesthetics – No visible radiators, giving you more freedom with furniture placement.
  

Cons

• Installation Cost – More expensive to install, especially in existing homes that require floor lifting.

• Slower Heat-Up Time – It takes longer to warm up compared to radiators, so it works best with a steady heat schedule.

• Not Always Practical for Retrofits – Can be disruptive in older properties unless part of a major renovation.
  

Whether you choose underfloor heating, radiators, or a combination, the key is correct system design. Our team ensures your air to water heat pump is matched perfectly to your home’s heating setup.

Choosing the Right System for Your Home

Not sure whether to go for underfloor heating, radiators, or both with your air source heat pump? Use this quick checklist:

Home Insulation – Well-insulated homes can run efficiently on either system.

Budget – Underfloor heating costs more upfront, radiators are usually cheaper to upgrade.

Space – Limited wall space? Underfloor heating frees up your rooms.

Renovations – If you’re already redoing floors, underfloor heating installation becomes more cost-effective.

Whichever you choose, the right design is crucial. Our experts will recommend the most efficient setup during your free home consultation so you get the comfort and savings you expect.

Conclusion: Underfloor Heating Is Optional — Smart Design Is Essential

The idea that you must install underfloor heating to use an air source heat pump is a myth. Yes, underfloor heating is a great match with an air source heat pump, but the truth is that correctly sized radiators will deliver great results as well at a lower initial cost.

It all comes down to design, installation quality, and matching the system to your home. Whether you stick with radiators, go full underfloor, or opt for a mixed setup, the right planning will make sure your home stays warm, efficient, and ready for the future.

Take the first step today:

Book your free home consultation with Puraflow Renewables and find out exactly what will work best for your property.