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OVERFLOOR UNDERFLOOR HEATING · RETROFIT-READY

Wunda Rapid Response

Underfloor heating boards that lay directly on top of your existing floor — no digging, no concrete pour. Warms a room in about 30 minutes from cold. Works with a heat pump or any boiler.

30 min
to warm a cold room
30 °C
water temp can be this low
no dig
lays on existing floor
EPS 400
high-strength foam board
75 m²
DIYer can lay over a weekend
any floor
tile, wood, LVT, carpet
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Why switch

Why this works

Lower bills than radiators

RUNS AT 30-45°C WATER, IDEAL FOR HEAT PUMPS

Reclaim 15% of your wall space

NO RADIATORS ON THE WALL

Warms a room in about 30 minutes

FROM COLD · LOW THERMAL MASS

Lays on top of your existing floor

NO DIGGING, NO CONCRETE

Tested at University of Salford

UKAS-ACCREDITED LAB

High-strength EPS 400 foam board

400 KPA COMPRESSIVE STRENGTH

Works with any heat source

HEAT PUMPS · BOILERS · HYBRID

UK-made, lifetime pipe guarantee

CHEPSTOW, WALES · SINCE 2006

How it works
Specification
Control/App
Installation
components
Aftercare

Boards on your existing floor

High-density foam boards (EPS 400) lay directly on top of your existing floor — concrete, timber, even old tiles. No digging, no concrete pour, no two-week building site. The boards take the weight of normal furniture and foot traffic.

Aluminium spreader on top

Each board has a 200-micron aluminium top layer that spreads heat evenly across the floor surface. Channels in the board hold the heating pipe in place. The aluminium is what gives this system its fast response — heat transfers to the floor in minutes, not hours.

Pipe routes through the channels

Flexible heating pipe (oxygen-barrier multilayer) runs through the channels in the boards. From the manifold in the cupboard, water flows out through the pipe loops, gives heat to the floor, and returns. One manifold can serve a whole floor of zones.

Floor finish goes straight on top

Tiles bed on directly with flexible adhesive. Engineered wood, laminate, LVT, or carpet float on top. The total floor build-up is around 15–20 mm — usually low enough that the door doesn't need re-hanging.

Warms in 30 minutes, cools just as fast

Because there's no big mass of concrete to heat up, the system warms the room in about half an hour from cold. And it cools down just as fast when you turn it off — meaning you don't pay to heat empty rooms in the evening.

Heat-pump-friendly water temperature

Rapid Response works at water temperatures as low as 30°C — far below what an old radiator needs. That's exactly the range where heat pumps run most efficiently. Lower water temp, higher efficiency, lower bills with a heat pump.

Board Material EPS 400 High-density expanded polystyrene (EPS 400).
Compressive Strength 400 kPa 400 kPa (supports normal furniture and foot traffic).
Top Layer 200-micron 200-micron aluminium spreader plate.
Build-Up Height ~15–20 mm ~15–20 mm including floor finish.
Heating Pipe Multilayer Multilayer with oxygen barrier · lifetime guarantee.
Working Water Temp 30–55°C 30–55°C (heat-pump-friendly low end).
Compatible Heat Sources Multi-source Heat pumps · gas/oil boilers · biomass · district heating.
Compatible Floor Finishes Tile · Wood · Carpet Tile, engineered wood, laminate, LVT, carpet.
Test Certification UKAS University of Salford, UKAS-accredited.
Made By Wunda Group Wunda Group, Chepstow, Wales (since 2006).

Easy controls

WundaSmart wireless thermostats — one per room. Set targets and schedules from your phone. Each room runs on its own programme.

WundaSmart app · iOS / Android

Full system control from your phone. Set each room’s temperature and weekly schedule. Holiday mode drops everything to frost protection. Quick overrides for one-off changes.

Per-room thermostats

A small wireless thermostat in each room reads the actual room temperature and signals the manifold to open or close that room’s valve. Real per-room control — not a one-stat-rules-them-all setup.

Weekly scheduling

Bedrooms cooler than living areas at night. Kitchen warm at breakfast and dinner times. Weekends different from weekdays. Set once on the app and the schedule runs automatically.

Geofencing (optional)

The app can detect when no one is home (based on your phone’s location) and drop the heating accordingly. Heats up before you arrive. Optional — off by default.

Voice control

Works with Alexa and Google Home. “Hey Alexa, set the kitchen to 21 degrees” — done. Useful for hands-busy moments in the kitchen.

CleverBloom can help

Setting up the room schedules to match your routine is something we can walk you through at install — or any time after by phone or app share.

Installation

Rapid Response is the easiest UFH system to retrofit. Send Wunda your floor plans for a free system design. Most projects can be installed by the householder's usual builder, with a heating engineer for the manifold connection.

01 Free design 3-5 working days Send Wunda your floor plans (or sketches with measurements). They'll come back with a system design: pipe layout per room, manifold position, zoning, heat-loss calculation, and a fixed-price quote. No commitment.
02 Order & deliver ~2 weeks lead Place a small deposit, the rest at delivery. Boards, pipe, manifold, fittings, and adhesive come on one delivery to site. Wunda's 5-star Trustpilot-rated team supports through the process by phone or email.
03 Lay the boards Half day for ~50 m² Boards stick to the existing floor with Wunda spray adhesive. Pipe routes through the channels following the design. About 75 m² can be laid by competent DIYers over a weekend — though a builder will be faster.
04 Connect & commission Half day A heating engineer connects the manifold to the heat source (boiler or heat pump), pressure-tests the pipe loops, and balances the flow rates per zone. The floor finish goes on after pressure testing — tiles same day, wood/LVT next day.

Components

What’s in a Wunda Rapid Response® overfloor system — the parts that turn an existing floor into low-temperature underfloor heating in about a weekend.

1 · 20 mm grooved insulation boards

The structural part of the system. Pre-grooved high-density insulation panels lay directly on top of your existing floor. The grooves hold the heating pipe in place. Adds just 20 mm to your floor build-up.

2 · PE-Xa heating pipe

12 mm cross-linked polyethylene pipe carries warm water through the floor. PE-Xa is highly flexible (bends into curves without kinking), durable (50-year working life), and oxygen-tight (won’t corrode metal parts in your heating system).

3 · Aluminium spreader plates

Thin aluminium plates clip into the grooves and wrap around the pipe. They conduct heat sideways from the pipe across the whole floor area — warm floor, not just warm pipes.

4 · Manifold

The control hub. Sits in a small wall-mounted cabinet (often a utility room or under-stairs cupboard). All the heating pipes meet here. Houses the circulating pump, flow meters, and a small mixing valve to set the system flow temperature.

5 · Per-zone actuators

Small electric valves on the manifold — one per heating zone (typically one per room). Open and close based on the room thermostat. Lets each room run at its own temperature on its own schedule.

6 · WundaSmart wireless thermostats

Battery-powered wireless thermostats — one per room. Set the target temperature, schedule, holiday mode from your phone. Bedrooms cooler than living areas, weekends different from weekdays.

7 · Edge insulation strip

Strip of foam insulation around the perimeter of each room. Allows the heated floor to expand and contract slightly with temperature without cracking the floor finish above. Standard part of any wet UFH install.

8 · CleverBloom can help

We design the pipe layout for your floor plan, work out the manifold size and flow temperature, and coordinate with your floor-finish supplier. The system itself can be DIY-installed by a confident DIYer over a weekend.

Aftercare

Rapid Response has no consumable parts. Once installed, the pipe loops run for the life of the building. The manifold and pump have routine wear, like any heating system component.

Lifetime guarantee on the pipe

Wunda's heating pipe carries a lifetime guarantee against material defects. The oxygen barrier prevents oxygen ingress, which is the main cause of pipe deterioration in heating systems.

No annual service for the pipe

The pipe loops sit under the floor doing their job for decades. The only routine attention is at the manifold — usually included in the boiler or heat-pump annual service.

Treated water on the heating side

System water must include a rust inhibitor and pass through a magnetic filter, like any wet heating system. The inhibitor pays back through cleaner pipework and longer pump life.

Floor finish — standard care

Tiled floors over Rapid Response are cleaned and maintained exactly like any tiled floor. Engineered wood and LVT have manufacturer-specific maintenance — nothing different because of the heating underneath.

Zone repair if ever needed

If a pipe is ever damaged (very rare — usually only by drilling into the floor), the affected zone can be lifted and re-piped without disturbing the rest. Rare in practice; most installations run trouble-free for the life of the building.

UK manufacturer support

Wunda Group is based in Chepstow, Wales — UK design, UK manufacture, UK warranty. Their care team responds 6 days a week. CleverBloom handles design specification and project coordination.

Pricing

Transparent pricing.
Grant included.

Heat pump unit only. Radiators, UFH, and emitters are on the heating page.

No items found.
fully installed
supply only

From £110/m²

supply & install · before VAT · typical retrofit, 50-100 m² project


Rapid Response boards + pipe + manifold (per m²) £55
Builder labour to lay (per m²) £35
Heating engineer connection & commission (per m²) £20

From £110/m²

supply & install · before VAT · typical retrofit, 50-100 m² project


Rapid Response boards + pipe + manifold (per m²) £55
Builder labour to lay (per m²) £35
Heating engineer connection & commission (per m²) £20
Equipment
£11,200
Installation & commissioning
£4,300
Fully installed
£15,500
After £7,500 BUS grant 0% VAT until March 2027
£8,000
get a quote
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Technical specifications

Board Material EPS 400 High-density expanded polystyrene (EPS 400).
Compressive Strength 400 kPa 400 kPa (supports normal furniture and foot traffic).
Top Layer 200-micron 200-micron aluminium spreader plate.
Build-Up Height ~15–20 mm ~15–20 mm including floor finish.
Heating Pipe Multilayer Multilayer with oxygen barrier · lifetime guarantee.
Working Water Temp 30–55°C 30–55°C (heat-pump-friendly low end).
Compatible Heat Sources Multi-source Heat pumps · gas/oil boilers · biomass · district heating.
Compatible Floor Finishes Tile · Wood · Carpet Tile, engineered wood, laminate, LVT, carpet.
Test Certification UKAS University of Salford, UKAS-accredited.
Made By Wunda Group Wunda Group, Chepstow, Wales (since 2006).

Works with

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Installed by CleverBloom

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Clever Bloom - Smart Home and MVHR Ventilation Installation UK

We provide smart technology for homes and commercial spaces, ensuring transparent processes and optimal resource management.

Working hours: Mon - Sun. 8am - 8pm

Proudly serving the entire UK!

Give us a call
07526 985258
Send us an email
info@cleverbloom.co.uk
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