Best Wet Underfloor Heating Systems UK 2026: Six Brands Compared

For straight UK guidance on water systems, start at underfloorheating.info, then use underfloorheating.directory when you’re ready to compare local installers and project quotes.

Quick Answer: There isn’t one best wet underfloor heating brand for every house. Wunda is particularly strong for low-profile retrofit floors, Polypipe and John Guest have excellent UK merchant and installer familiarity, Uponor is a premium designed-system choice, and Emmeti and Warmup offer broad manifolds, controls and floor formats. Budget £25 to £55/m² supplied for a basic screed system or £45 to £85/m² for low-profile materials, before controls, heat-source connection and labour.

The six systems at a glance

The numbers below are budgeting ranges, not fixed retail prices. A small two-zone pack costs more per square metre than a 100m² ground floor because the manifold, controls and design fee don’t shrink with the floor area.

Prices include the core floor-heating materials but not the final floor finish, screed, heat pump or boiler, electrical wiring or full installation. Always compare like with like.

Best overall system or best brand?

Here’s the bit sales pages tend to skip. The best water underfloor heating system is the one that meets the room heat loss at the lowest practical flow temperature without creating a silly floor build-up.

A well-designed mid-price system beats premium pipe laid at the wrong spacing. Ask for a room-by-room heat-loss calculation, proposed flow temperature, pipe centres, loop lengths and flow rates. If a quote gives you only total square metres and a kit price, it isn’t a finished design.

Our wet UFH buyer’s guide explains screed, overlay and suspended-floor formats. This article focuses on what differentiates the six leading suppliers.

Wunda: best for a low-profile retrofit

Wunda’s Rapid Response boards put the pipe close to the finished floor, avoiding the slow thermal mass of a thick screed. That’s useful in renovations where you can’t excavate the slab or wait hours for the floor to warm.

The published guarantee is unusually clear: 50 years for its low-temperature PE-RT/AL/PE-RT pipe, 10 years for manifold bars, five years for manifold moving parts and pump sets, and cover for the branded controls. The aluminium layer in the pipe helps it hold its shape as installers press it into routed boards.

Allow roughly £45 to £80/m² for a supplied overlay package once boards, pipe and a share of the manifold are counted. Complex floor preparation, levelling and coverings sit on top. Read our full Wunda underfloor heating review if minimal floor height is your main constraint.

Best for: occupied renovations, timber or solid-floor retrofits and quick-response zones.

Watch for: the board and floor covering must form an approved build-up. Don’t mix a cheap levelling compound or adhesive into a tested system and hope for the best.

Polypipe: best UK merchant network

Polypipe supplies systems for solid, floating and suspended floors. Its BBA-certified UFH range includes 12, 15 and 18mm polybutylene barrier pipe, with brass or stainless steel manifolds in two to 12-port configurations.

PB pipe is flexible and installer-friendly. Polypipe’s range also gives builders a familiar route through UK merchants, which matters when a fitting goes missing at 3pm on screed day.

The current warranty wording gives 50 years on qualifying UFH pipe, while components have shorter initial cover that may extend subject to the stated conditions. Don’t write “50-year system warranty” on your comparison sheet without checking those conditions.

Best for: new builds, extensions and trade-led jobs needing local stock and established technical literature.

Typical supplied allowance: £30 to £50/m² for a screed system, rising towards £65/m² for panel-led or smaller projects.

Uponor: best premium designed system

Uponor offers traditional tacker systems, Minitec wet installation at about 15mm, Siccus Mini dry construction and larger heating and cooling systems. Its Vario S manifolds use stainless steel, while Magna uses glass-fibre-reinforced polyamide for larger applications. Depending on the model, Vario serves up to 12 or 16 circuits.

Uponor states a 25-year warranty as standard on its UFH systems and manifolds, with electrical goods covered for two years. Its PE-Xa pipe and Q&E connection ecosystem appeal to installers who already use Uponor plumbing products.

You normally pay for the depth of range, design input and coordinated components. That’s worthwhile on a heat-pump project where shaving a few degrees from the flow temperature can improve seasonal performance.

Best for: high-spec new builds, difficult refurbishments and projects where designed heat output matters more than the cheapest kit.

Typical supplied allowance: £35 to £55/m² for conventional construction and £55 to £85/m² for proprietary low-profile formats.

John Guest: best for fast, familiar connections

JG Underfloor combines 15mm PEX or polybutylene barrier pipe with Speedfit connections. The stainless steel manifold comes with adjustable flow indicators, fill and drain points, air venting and 15mm push-fit loop connections. It is available with two to 12 ports.

The 12mm LowFit range handles shallow retrofit floors. For conventional work, plenty of UK plumbers already know the fittings and pipe preparation rules, reducing the learning curve on site.

John Guest states 50-year cover for qualifying pipe and fittings, but two years for UFH manifolds, control packs and controls. Again, the shortest warranty on the critical component may matter more than the headline pipe warranty.

Best for: installer-led extensions, standard screed floors and LowFit retrofit work where Speedfit familiarity saves time.

Typical supplied allowance: £30 to £50/m² conventional, or up to about £65/m² for LowFit and small areas.

Emmeti: best for manifold and control choice

Emmeti has long been strong in distribution hardware. Its UK range spans brass and stainless steel manifolds, mixing sets, actuators, wiring centres and pipe options including PE-Xa, PE-RT and multilayer construction depending on the package.

That flexibility suits a plumber specifying individual components, or a mixed home with radiators upstairs and UFH downstairs. It also means you need to compare the exact bill of materials. “Emmeti system” can describe several very different specifications.

Warranty periods vary by range and installation conditions. Ask the supplier to put the pipe, manifold, pump and controls cover in writing rather than relying on a single headline.

Best for: bespoke multi-zone systems and installers who want to select the manifold, blending set and controls separately.

Typical supplied allowance: £30 to £55/m² for screed, rising to about £70/m² with specialist panels or upgraded controls.

Warmup: best one-brand homeowner package

Warmup is better known for electric mats, but it also supplies hydronic pipe systems, low-profile formats, stainless steel manifolds and connected controls. The appeal is a coordinated design and a recognisable homeowner-facing brand.

That makes sense if you want the floor system, thermostat and technical support through one route. As with every supplier, confirm which party designed the system and who owns performance if the calculated room output isn’t achieved.

Warmup’s pipe and component warranties differ by product and depend on registration and correct installation. Use the current project quotation as the authority, not a warranty figure copied from an old brochure.

Best for: homeowners wanting design support and matched controls rather than loose trade components.

Typical supplied allowance: £35 to £55/m² conventional and £50 to £80/m² low profile.

Pipe type, what actually matters

PE-Xa, PE-RT, PB and multilayer composite pipe can all work well. Focus on five things:

1. It has an oxygen barrier suitable for a sealed heating system.
2. The diameter matches the system design and manifold connection.
3. Loop lengths stay within the manufacturer’s hydraulic limits.
4. There are no hidden joints beneath the floor.
5. The pipe, fittings and manifold retain traceable warranty support.

Small-bore pipe allows thin retrofit panels but creates more resistance. That can mean shorter loops, more manifold ports or higher pump duty. Standard 16mm pipe generally suits larger screeded zones. Our guide to how much UFH pipe you need explains the relationship between spacing, area and loop length.

Manifolds and controls, don’t buy the cheapest box

A good manifold gives every loop an adjustable flow meter, isolation, filling and draining points, automatic or manual air removal and correctly sized actuators. Stainless steel and DZR brass are both credible. Reinforced polymer can also be appropriate when designed for the duty.

For a gas boiler plus UFH, a pump and thermostatic blending arrangement may be needed to protect the floor from high primary temperatures. A heat pump designed to supply UFH directly may not need local blending. Unnecessary mixing can raise the required heat-pump temperature and waste efficiency.

The manifold guide shows what each component does, while the zoning guide explains thermostats, actuators and wiring centres.

What a proper quote should include

Ask every supplier for the same scope:

• Room-by-room heat loss and design output
• Pipe type, diameter, spacing and maximum loop length
• Design flow temperature and temperature drop
• Manifold material, port count, flow meters and isolation
• Pump or blending controls, if required
• Number and type of thermostats and actuators
• Floor panels, fixings, edge strip and pressure-test equipment
• CAD loop drawing and commissioning flow rates
• Separate warranties for pipe, manifold, controls and labour

Then compare total project cost. A £28/m² pipe-and-clip offer can become more expensive than a £45/m² designed package once somebody adds the manifold, controls and missing zones.

Which one would I choose?

For a conventional new-build screed floor, I’d shortlist Polypipe, John Guest and Uponor, then choose on design quality, local installer experience and the complete price. For a shallow retrofit, I’d compare Wunda Rapid Response, Uponor Minitec or Siccus Mini, JG LowFit and the relevant Warmup overlay system.

If you’re installing a heat pump, don’t accept “heat-pump compatible” as the whole answer. Ask what flow temperature the design needs on the coldest day. The heat pump and UFH guide explains why 35°C design water and 45°C design water can produce noticeably different efficiency.

The brand matters, but the heat-loss calculation, floor build-up and commissioning decide whether the house is warm. Spend your attention there.