ProWarm Water Underfloor Heating - High Output

Designed for rooms with high heat loss, such as conservatories, or where underfloor heating needs to work alongside traditional radiators, the ProWarm High Output Water Underfloor Heating Kit offers unmatched heating performance, professional-grade quality, and easy installation – all backed by a lifetime guarantee.

Why Choose a High Output Water Underfloor Heating System?

• Optimised for High Heat Loss Areas – With an impressive output of 125W/m² (based on 200mm pipe spacing), this kit is engineered for spaces where extra heating power is essential.
• Ideal for Conservatories & Large Glazed Areas – Combine underfloor heating with radiators to maintain consistent, energy-efficient warmth throughout the year.
• Tailored to Your Room Size – Each kit is configured to cover a specific area in square metres, making it easy to match the right system to your space.

Uncompromising Quality in Every Component

All ProWarm water underfloor heating kits feature advanced water temperature control for safe, efficient heating. Unlike lower-quality systems, we include only premium materials that meet or exceed industry standards:

• WRAS-Approved Pert-Al-Pert Pipe – Manufactured to strict European standards with a built-in aluminium core that acts as an oxygen barrier to prevent corrosion and extend the life of your system.
• Lifetime Warranty – Invest with confidence knowing your system is backed by our lifetime guarantee.

What’s Included in Your High Output Kit

Each ProWarm High Output Water Underfloor Heating Kit includes professional-grade components for a complete, hassle-free installation:

• Grundfos Temperature or Mixing Unit –
  • UPM3 Single Circuit Constant Temperature Unit
  • UPM3 Pump & Mixing Valve Manifold Unit (for larger areas)
• 2, 3 or 4 Port Stainless Steel Manifold – Factory-assembled with adjustable flow meters, isolation valves, and mounting brackets.
• 16mm ProWarm Pert-Al-Pert Pipe – High-performance pipe designed for durability, flexibility, and superior heat transfer.
• Edge Insulation – Reduces heat loss around room perimeters and allows for natural expansion during heating cycles.
• Essential Installation Tools – Includes pipe re-rounding tool, pipe staples, and pipe cutters for fast, accurate setup.
• Smart Thermostat (Optional) – Add intelligent control to maximise efficiency and comfort (if selected).

Engineered for Demanding Environments

If you're looking for a robust water underfloor heating system that performs even in challenging environments, look no further. ProWarm High Output Kits deliver powerful, reliable, and energy-efficient heating where you need it most.

Trust the experts in water underfloor heating – choose ProWarm for performance, quality, and peace of mind that lasts a lifetime.

Compare Kits

This table shows exactly what you'll get in the box based on your chosen kit size.

Specifications

(1) At any rate above the freezing temperature of the transported fluid.

The ProWarm Water Underfloor Heating Kit is WRAS approved. WRAS approval demonstrates it is of a suitable quality and standard against the Water Supply (Water Fittings) Regulations and Water Supply (Water Fittings) (Scotland) Byelaws, provided it is installed and used in accordance with the installation and requirement notes and any other restrictions within the approval. Any water fitting, which when installed, will carry or receive water from the public mains water supply in the UK, must comply with these regulations. They require that a water fitting should not cause waste, misuse, undue consumption or contamination of the water supply and must be ‘of an appropriate quality and standard’. To learn more about compliance, visit: WRAS approvals.

Specifications

High-Quality Construction

• 
  ProWarm Electric Underfloor Heating Sticky Mat: Utilizes the same premium cable as the ProWarm Loose Cable kit. The mat incorporates a sticky fibreglass mesh to ensure optimal heat output by maintaining proper cable spacing. Installation is straightforward—simply roll out the mat to cover the desired heating area.
• 
  Heating Cable: Series-type with twin conductors and a 4m cold lead at one end.
• 
  Cable Composition: The resistance heating wire is encased in a fluoropolymer insulation layer, wrapped in protective metal shielding, and enclosed in a final plastic outer sheath. The twin conductor cable has a final diameter of 2mm.
• 
  Junction Design: Unique design for hot and cold lead junctions ensures they are 100% foolproof.

Standards and Approvals

• 
  Standards: Meets all test requirements of IEC 60335.
• 
  Certifications: CE certified by SGS.

Performance and Benefits

• 
  Cost-Effective: Provides heat precisely where needed, optimizing heat utilization and minimizing losses.
• 
  Flexibility: Can be installed in any area or floor layout.
• 
  Comfort: Close and uniform spacing of heating cables, combined with thermostat controls, allows for precise temperature settings, enhancing comfort.
• 
  DIY-Friendly: Designed for easy installation with clear instruction manuals and professional technical support.
• 
  Versatility: Available in various heat loads and sizes to suit various flooring types.

Mat Dimensions

• 
  Width: 0.5m
• 
  Length: Dependent on the selected square meter coverage
• 
  Cable thickness: 2mm

Kit Includes:

• Underfloor Heating Sticky Mat (Two individual mats if kit size over 12m2)
• Floor Primer - a high-performance universal priming/sealing agent suitable for plaster, timber, brick, and block work.
• Roller - a high-quality roller for applying floor primer to the subfloor
• Adhesive tape - works to assist in holding a mat or cable in position during installation
• 2m Floor Sensor Probe Conduit - provides a protective pathway for the sensor probe, connecting to your thermostat
• Digital thermostat (if selected) - adjust the heat settings and enjoy warm floors through a simple touch of a button

Installation

Please Note: This is a brief guide. Always refer to the full installation manual for comprehensive instructions.

1. Plan Your Layout:

• Divide the floor into a series of rectangles. Use these measurements to calculate the number and sizes of mats needed, excluding permanent or static fixtures from your calculations.

2. Prepare the Subfloor:

• For screed over concrete floors, lay insulation boards to minimize heat loss and ensure quicker warm-up times.

3. Lay the Heating Mat:

• Start with the first run of the mat. Cut the mat (leaving the cable intact) at the end of each run, turn it 90° or 180°, and continue laying.
• Once the area is covered, adjust the mat so that the loops are evenly spaced.
• Secure the mat to the subfloor using the special tape provided.

4. Electrical Connections:

• Install an RCD fused spur to power the thermostatic controller/programmer and the mat system.
• Lay the temperature probe from the timer-thermostat onto the floor, position it equidistant between two cable loops, and secure it to the surface.
• Position the unheated power supply cable from the end of the mat system near the thermostat.
• Make all necessary connections to the power supply. Run the heaters for no more than 10 minutes to ensure they are heating up properly.

5. Finish the Flooring:

• Option 1: Apply a thin, self-levelling screed over the mat and allow it to dry completely before laying tiles.
• Option 2: Directly trowel flexible tile adhesive over the mat and lay the floor tiles.
• After grouting, let the tile adhesive cure fully before switching on the system.