Best Underfloor Heating — 150W/m² (2026)
2 underfloor heating matching power “150W/m²”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Best Underfloor Heating UK (2026) guide.
#1 Pick
Warmup Stickymat SPM2 150W/m2 Self-Adhesive Underfloor Heating Mat, Area 2sqm- 150W/m²
£99.99
Pros
- Self-adhesive backing makes installation under tile straightforward
- From a leading UK underfloor heating brand with long track record
- 150W/m² output warms up quickly under tiled floors
Cons
- Thermostat sold separately on this listing
- Best suited to tiled or stone floors, not carpet
#2 Pick
ProWarm Electric Underfloor Heating Mat Kit 150W / 12.0m²- 150W/m²
Currently unavailable
Pros
- 12.0m² coverage suits larger kitchens and open-plan rooms
- Works under tiles and many other floor coverings
- Even heat output warms the whole floor, not just spots
Cons
- Thermostat sold separately on some kit variants
- Installation is best left to a qualified electrician
This 150W/m² underfloor heating system provides a consistent and comfortable warmth throughout your home or room. Designed for installations where a lower heat output is desired, this kit delivers efficient heat distribution, ideal for smaller rooms or areas where subtle temperature control is key. The 150W/m² specification allows for precise heat management, contributing to energy savings by only heating the space you actively use.
This system typically incorporates a thin-film heating cable embedded within a protective mesh mat. When activated, the cable generates heat which warms the surrounding floor surface. It's crucial to ensure correct underfloor substrate preparation before installation – a level and stable surface is vital for optimal performance and longevity of the system. Remember to factor in the area you’re covering when calculating your total power requirements.
The 150W/m² rating suggests this system is best suited for spaces up to approximately 3.6 square metres, although precise room size will depend on insulation levels and external heat loss. Always consult the manufacturer's specifications for detailed guidance on installation and suitability for your specific application. Check Amazon UK for compatible pumps and controls.
FAQ
What kind of floor is this suitable for?
This 150W/m² system can be installed over a wide range of floors, including screeds, concrete, plywood, and timber. However, it's crucial to ensure the substrate is level and stable – unevenness will affect heat distribution and efficiency.
Do I need a pump with this?
Yes, you’ll almost certainly require a circulating pump to distribute water through the heating cable. The pump size depends on the system's flow rate and pipework length; consult the manufacturer's specifications for recommendations – Amazon UK lists compatible pumps.
How do I calculate the total power needed?
You’ll need to multiply the area of your floor space (in square metres) by the wattage per square metre rating (150W/m²). This gives you the total required wattage; ensure you consider any additional losses due to insulation.
What is the minimum screed depth I should use?
A minimum screed depth of 20mm is generally recommended, though deeper screeds (30-50mm) can improve heat retention and thermal mass. This allows for sufficient space around the heating cable for long-term performance.
Can I connect multiple heating kits?
Yes, you can often cascade multiple 150W/m² kits together to cover larger areas. However, always verify compatibility with the pump and control system before connecting – consult the manufacturer's instructions.
What type of insulation should I use underneath?
Using a layer of insulation beneath the heating cable is highly recommended. This helps retain heat within the floor and reduces energy consumption; ensure the insulation is suitable for underfloor heating applications.
How do I control the temperature?
You’ll typically need a thermostatic controller to regulate the system's output. These controllers allow you to set your desired room temperature and maintain consistent warmth – Amazon UK offers various controller options.
What is the warranty on this product?
The warranty for this product is provided by the manufacturer, typically covering defects in materials and workmanship. Refer to the manufacturer’s documentation available on Amazon UK for full details.
How long will it take to heat up a room?
Heating times vary depending on factors such as room size, insulation levels, and thermostat settings. Typically, you can expect to reach your desired temperature within 30-60 minutes after activation – consult the manufacturer’s guide for specific timings.
What are the electrical safety considerations?
Always ensure the installation complies with current UK regulations. Use a qualified electrician to install and connect the system, and always fit a Residual Current Device (RCD) for added safety protection - check Amazon UK for compatible RCDs.