90m2 Ultra Warm Tile Direct Insulated Panel System 25mm @ 150mm

Compatible with most modern boilers, our solid-floor tile direct system kits are perfect for use on existing floors or where digging down is not an option.

The versatility of this efficient heating system is also beneficial, perfect for heating a work or domestic premises. Even better, everything you need is included in the underfloor heating kit. 

System Coverage: 90.0 m2
Total Room Heat – Total Room Heating for all general rooms insulated to current building standards (150mm pipe spacing)

Regular Price £2,719.80 Incl. Vat: Special Price £2,496.00 £2,080.00
Availability: In stock
SKU
TDS90

The overlay kit is perfect for any room in the house or in a work setting too, offering heat without a huge heating bill.

But when there is no opportunity to dig down or the existing floor is floating, such as floorboards, you need a low profile, robust solution – and our underfloor heating kit is the answer.

Everything in one box
When we say everything is included in our kit, we mean it;

-- Novatherm™ 25mm x 1200mm x 600mm low profile overlay panels for use on a hard sub floor or floating floor (x125)
-- An A-rated Grundfos 15-50/60 heat pump
-- Heatmiser Digital thermostat for easy control of temperature
-- 16mm Novatherm™ Professional grade MLCP plastic piping that doesn’t warp or split (x600)
-- 6 Port Novatherm™ Dualmix manifold faultless performance time after time Including: Manifold Isolating Valves x 2 - Temperature Guage x 2 - Lockshields with flow meters on each port - Drain/fill valves with blank cap x 2 - Automatic air vent x 2 - Metal fixing brackets x 2
-- Reaming tool


Order online today
Order is simple.

Choose the right low profile overlay system size that you need and checkout using our secure payment method or use PayPal.

Next Working Day Delivery

Applies to UK Mainland only. Order before 12:30pm Mon–Fri. Orders placed after 12:30pm Friday will arrive Tuesday. Saturday delivery is available at an extra cost.

Free delivery

UK Mainland orders over £250 (ex VAT). Larger or palletised orders outside UK Mainland may incur additional fees.

Additional Information

Deliveries are fulfilled by third-party couriers. Delivery times are estimates and we are not liable for delays. For detailed information about shipping, view our Shipping and Returns.

 
Item Qty
Novatherm Low Profile Overlay Panels
• 25mm x 1200mm x 600mm
125
“A” Rated Grundfos 15-50/60 Heat Pump 1
16mm Novatherm Professional Grade MLCP Plastic Piping 600
Novatherm 6 Port Dualix Manifold, including: 1
Manifold Isolating Valves 2
Temperature Gauges 2
Lockshields with flow meters on each port
Drain/fill valves with blank cap 2
Automatic air vents 2
Metal fixing brackets 2
Heatmiser Digital Thermostat 1
Pipe Reaming Tool 1
 

-- Remove all contaminants, dirt, grease etc from the substrate and make dust free.
-- Loose lay the boards across the floor and number the boards on the upper face to identify position of each board, making sure the pipework runs are calculated correctly to reach manifold position.
-- Uplift the numbered boards and prime the underside of the boards with Ultra Floor Prime-IT MSP bonding primer. This should be applied by brush or roller in a thin film. Allow to thoroughly dry to a clear green film ensuring primed face does not come into contact with other boards, walls or subfloor until it is ready to be bedded.
- -Drying time will depend upon ambient conditions but is typically between 1 and 4 hours.
-- Whilst the primer on the boards is drying commence with priming of the substrate using UltraFloor Prime-IT MSP. The primer should be diluted 3 parts water to 1 part primer and allowed to fully dry.
-- Apply flexible tile adhesive to the subfloor using a notched trowel to give a minimum 3mm adhesive bed. Bed the boards, primed side down, into the adhesive and ensure compression of adhesive ridges, ensure full compression of the adhesive to give a void free full adhesive bed. Additional use of  screws and washers is recommended over timber substrates where needed, fixed at every 300mm. Allow to cure for approximately 4 hours to ensure the adhesive has gone through its initial set before carrying out any further works.
-- Pipe work may be fitted into the boards once they are all secure. Where possible this is best left until the following day. It is recommended that the pipe system is checked for leaks and correct water pressures prior to tiling over.
-- Prime the upper face of the boards with Ultra Prime-IT MSP bonding primer. This should be applied by brush or roller in a thin film. Allow to thoroughly dry to a clear green film, (approx 1-4 hours).
-- Apply Ultra Floor Level-iT 2 two part smoothing compound over entire floor area, making sure all voids and gaps are completely filled, the levelling compound should encapsulate the whole floor and cover the board with a 5mm layer on top.
-- Allow to cure for 24 hours prior to carrying out any tiling. Cold and/or humid atmospheres will delay the curing of Level-iT 2 so allowances should be made accordingly.
-- Prime the cured Level-iT 2 using Ultra Floor Prime-IT MSP diluted with 3 parts water to 1 part primer. Allow to thoroughly dry.

Frequently Asked Questions

Which is better, 150w or 200w for underfloor heating?
The choice between 150W and 200W underfloor heating depends on the room type, insulation quality, and how you plan to use the system. A 150W/m² system is typically the best option for well-insulated areas or rooms where underfloor heating will act as the main heat source, offering steady and efficient warmth. In contrast, a 200W/m² system provides a higher heat output and faster warm-up times, making it ideal for poorly insulated areas, spaces. Regardless of wattage, proper subfloor insulation is essential to maximise efficiency and reduce running costs.
What kind of sub-floor and floor finish does the 90m2 underfloor heating 25mm panel system support?
The 25mm overlay panel underfloor heating system supports installation on a hard sub-floor or floating floor, making it appropriate for both concrete and timber-based constructions. It is intended to be used beneath tile finishes (such as ceramic or porcelain) via the low-profile 25mm boards (at 150mm pipe centres) to maintain solid heat transfer to the tiled surface above.
Why is the 150mm pipe spacing important in an Ultra-Warm system?
The 150mm pipe spacing in an Ultra-Warm system is important because it ensures full room heating coverage for all general rooms insulated to current building standards. When the pipes are laid at 150mm centres within the 25mm panel boards, you get consistent heat distribution across the 90m² area, preventing cold spots and optimising the system’s performance for that specific kit size.