What Is Rapid Response® Underfloor Heating?

Our Rapid Response® underfloor heating is the most popular system we sell. Offering the most control, convenience, comfort and efficiency with the lowest running costs of any heating system. It’s hassle free to install and ideal for new builds and older homes being updated or renovated.  Perfect for any renovator or DIY enthusiast.

Consisting of our pipes fixed in Rapid Response® panels that sit between the structural base and floor finish. The system is easy to install and easy to control.  Rooms become cosy quickly using the lowest possible water temperatures (30-45°C.)

No other heating system rivals the level of comfort & control, while maintaining the lowest possible running costs.

Things to Consider about Rapid Response® Underfloor Heating

The system uses our Rapid Response® panels that come in two sizes to accommodate different ceiling heights, 16mm and 20mm. In new build projects we recommend building this depth into your calculations. In retro-fit projects the main consideration is ceiling height and adjusting your door heights.

Why choose Wunda Rapid Response® underfloor heating 

An icon in white and orange of our wunda smart thermostat

Fast heat ups & cool downs

Wunda’s Rapid Response® Overfloor Heating System heats up and cools down in minutes.

An icon of a device control panel in a gradient of orange

Adjustable & controllable

Heat when you want it with fast aluminium coated Rapid Response® boards.

An icon of a water droplet for leak proof inside an orange circle

Leak proof pipes

No joins under the floor and 100% leak proof pipe.

Orange icon of a shovel crossed with a pick to show there is no need to dig

Easy Install

No need to dig up floors, no hassle. Perfect for competent DIYers.

Round and orange icon of a screwdriver for easy installation

Low maintenance

Very low maintenance and reliably consistent, it just works!

Circle icon of a boiler showing our system is Compatible with all boilers

Compatible with all boilers

Compatible with any heat source, including future heat pumps.

Why Choose Rapid Response Overfloor® from WUNDA ?
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3 Steps to Comfort...

Get a free quote

Inquire today for a free, no obligation quote.

Design, then install

Place a small refundable deposit for a custom designed, highly efficient UFH system. Our 5-star customer care team are here 6 days a week to help you or your installer before, during and long after the install.

Enjoy your floor heating!

Sit back and enjoy luxury comfort, lower heating bills and furnish your home with freedom with 15% more usable space!

High-Efficiency System Design

We’re renowned for our high-efficiency underfloor heating system designs. With a deep understanding of heating technology and a commitment to innovation, our team consistently delivers cutting-edge solutions that provide optimal comfort and energy efficiency.

How Do Heatpumps Work

Underfloor Heating Efficiency and  Heat Sources

The Wunda Rapid Response® Underfloor heating system gives the most efficient results from any heat source. Due to less energy being used to produce low water temperatures 30-45°C. Perfect for any boiler or Ground Source or Air Source Heat Pump.

Learn More About Efficiency

Rapid Response® underfloor heating is suitable for all floor finishes

PERT layered pipe diagram showing the various layerings that make up the pipe


Available in 16mm or 12mm to fit your desired solution, featuring an oxygen barrier for increased lifetime and aluminium core for greater thermal conductivity.

Board Heights To Suit Your Project.

Compare systems

Not sure which UFH system is right for your upcoming project, compare the differences below

Screed Rapid Response® Joist
New builds
No need to dig up floors
Fast heat up time

Underfloor Heating Knowledge Hub

Find out all you need to know about underfloor heating for your property or room.


Get a Free Estimate

For a free, no obligation estimate please send us your plans or get in touch. The Wunda 5 star Trustpilot rated team is here to help you get the right information and system design for you. 

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Your Questions

It’s a common misconception that underfloor heating is a luxury accessory to keep feet warm. In fact, it’s the most efficient heating system available! By replacing your radiators with Wunda water-based underfloor heating, you can save space, increase comfort, and make your home net zero ready. 

To learn more about our water-based underfloor heating systems, please visit our website at Wunda Group. 

The insulative properties of our Rapid Response® boards have been tested at the University of Salford’s UKAS accredited testing lab. The results are as follows: 

  • 20mm of Rapid Response® has an R-value of 0.447 (+/- 2%). 
  • 16mm of Rapid Response® has an R-value of 0.379 (+/- 2.8%). 

Please note that while the EPS material is insulative, it is not a replacement for insulation. In a new build, the property is expected to be built in line with up-to-date building regulations. 

If you have an older property that is successfully heated by radiators, the Rapid Response system will heat more efficiently and effectively than radiators. However, if your home is unsuccessfully heated by radiators due to high heat loss, the heat loss should be addressed regardless of your choice of heating system. 


 How much height does this add to the room? 

Our Rapid Response panels come in two sizes: 16mm and 20mm (about the size of a 20 pence piece). To calculate the total build-up height, add this to the height of any necessary decoupling layer such as a 5mm screed (tiling, LVT) along with your floor finish. 

Please note that the choice between the 16mm and 20mm panel has little to no effect on heat output but will affect price. Systems using the 16mm panel are more expensive than those using the 20mm panel, due to an increased amount of pipe being necessary. 


The Rapid Response® system should be laid on as flat a surface as possible. The polystyrene boards are fairly forgiving, but if there are any dips, holes, or undulations in the floor, we recommend using a levelling screed to deal with them. The floor should be dry and free of dust, oil, or other contaminants to ensure that the adhesive sticks properly. 

For more information about floor preparation, check out this blog post: How To Install Underfloor Heating On Concrete Floor – Wunda Group. 

Our Rapid Response® system is compatible with most floor finishes, including carpet and underlay (up to 2.5 tog), wood, LVT, laminate, concrete, and tiles. Wunda Rapid Response® high-density boards also support heavier floor finishes such as marble and stone tiles. These boards are approved by leading tile adhesive manufacturers to be laid directly on top without the need for an intermediary layer. This helps to reduce system cost, build-up height, and decrease installation time. 

For those opting for a wood or vinyl finish, we supply floor probes to protect the floor finish. Please note that wood products such as Maple and Beech are not compatible. 

For more information on each floor finish, please visit our website at Underfloor Heating for Different Floor Types | Wunda Group. 

To ensure that our rapid response system works optimally, we recommend installing it on a fixed floor made of wood, concrete, tile, or stone. This will prevent any movement and ensure that the system functions smoothly. Please note that the system should not be installed on top of any floating floor, and any such floor finish should be removed first. This applies to carpet, LVT, and laminate flooring. If you wish to install the system on top of tiles, please ensure that the floor is dry and free of any contaminants. 

Some customers prefer to remove any fixed floor finishes to keep the build-up height as low as possible. We recommend that any existing old asbestos flooring tiles be professionally removed before laying a new floor on top. This will ensure the safety of everyone involved. 

Water based underfloor heating does require some maintenance. In comparison to radiators water underfloor heating needs very little maintenance and the maintenance it does need is easier to carry out, as the system is maintained from one central point – the manifold.

The maintenance follows a similar to process to central heating with radiators. Ensure there’s no air in the system by releasing at the manifold and turn on after summer before the depths of winter to check all is running smoothly.

A Rapid Response® floor heating system produces heat in as little as 30 minutes because it has a level of controllability not seen before in under floor heating. Combined with our Home Heating Controls it can be turned on, off, up, down in individual areas of the home at the touch of a button on your smart phone, Ipad or laptop from wherever

The Rapid Response® heating system is a water-based floor heating system that uses low-temperature warm water to heat rooms evenly and quickly. Input temperatures can be as low as 45°C, using half the energy required to heat a radiator at 70-90°C.

This combined with the on demand nature of The Rapid Response® heating system, allows users to only heat the rooms they’re using, and not have to leave the heating on all the time like old traditional screed systems which took days to heat and cool.


The responsive use and lower energy requirements to run the Rapid Response® heating system make it a low carbon solution that’s compatible with current heating technology like gas/oil boilers; as well as working efficiently with alternative fuels of the future like hydrogen boilers and air & ground source heat pumps.

Rapid Response® on demand heat can reach desired temperatures in as little as 30 minutes.

This is thanks to all the work done in developing the Rapid Response® aluminium that’s used in both the board and pipe.

Got a question or need some help?

Visit our support hub for FAQs, How-to videos or to contact one of our experts.

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