Underfloor Heating Loose Cable System
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Underfloor Heating Loose Cable System
Underfloor Heating Loose Cable Systems provide a flexible and efficient solution for electric underfloor heating installations. Designed for customised layouts and larger or irregularly-shaped areas, these twin conductor cables deliver consistent warmth beneath tile, stone, and similar floor finishes.
Key Features
- High-quality twin conductor heating cable with a single connection (cold tail)
- Power output options typically 12W/m for versatile heating requirements
- Durable fluoropolymer conductor insulation with PVC outer sheath for long-lasting protection
- Cable diameter approximately 3.6mm, ensuring low profile and easy installation
- Continuous metallic earth screen for electrical safety
- Minimum cable spacing to avoid cold spots: at least 50mm apart
- Suitable for installation on plywood, concrete, or suspended timber floors with recommended thinset or self-levelling cement overlay
- Safe for wet zones such as bathrooms and kitchens when installed correctly
- Thermostat control with floor temperature sensor (typically 3m lead) for precise temperature management
- Compliant with EN60335-2-96 and the 18th Edition Wiring Regulations (BS7671:2008)
- Lifetime warranty for peace of mind
Typical Technical Specifications
- Supply Voltage: 230V
- Output: 12W or 16W per metre of cable length (select based on heating need)
- Cable length options vary from approximately 9.6m to 150m, to cover from small to extensive floor areas
- Cable diameter: approx. 3.6mm
- Minimum bending radius: 25mm
- Cold lead length: approximately 2.5m for connection to the thermostat or power supply
- Ambient temperature for installation: minimum 5°C (40°F)
Installation Notes
- Do not cut or shorten the heating cable
- Maintain minimum cable spacing of 50mm or more to prevent overheating
- Embed cable fully in thinset, mortar, or similar materials for heat transfer and protection
- Place the floor temperature sensor between cable runs, approximately 25cm from the wall within the heated area
- Ensure power supply voltage matches cable rating (230V nominal)
- Do not install heating cable under permanent fixtures or furniture without feet
- Suitable for indoor use only, avoid installation in walls or ceilings
- Check cable resistance before and after installation to ensure cable integrity and warranty compliance
Heating Coverage Chart
This chart shows typical floor coverage for ThermRite heating cables at different power densities, helping you select the right cable length and cable spacing for your heating needs:
| Cable Length (m) | Coverage Area at 150W/m² (Optimum Heat) | Coverage Area at 100W/m² (Background Heat) |
|---|---|---|
| 12.5 | 1.0 m² | 1.5 m² |
| 18.75 | 1.5 m² | 2.25 m² |
| 25 | 2.0 m² | 3.0 m² |
| 31.25 | 2.5 m² | 3.75 m² |
| 37.5 | 3.0 m² | 4.5 m² |
| 50 | 4.0 m² | 6.0 m² |
| 62.5 | 5.0 m² | 7.5 m² |
| 75 | 6.0 m² | 9.0 m² |
| 87.5 | 7.0 m² | 10.5 m² |
| 100 | 8.0 m² | 12.0 m² |
| 125 | 10.0 m² | 15.0 m² |
| 150 | 12.0 m² | 18.0 m² |
| 175 | 14.0 m² | 21.0 m² |
| 200 | 16.0 m² | 24.0 m² |
| 250 | 20.0 m² | 30.0 m² |
What’s Included
- ThermRite™ Loose Heating Cable in your chosen length
- Cold lead cable (approx. 2.5m) for electrical connection
- Floor temperature sensor with 3m lead for thermostat control
- Comprehensive installation instructions and guidance
Why Choose ThermRite™ Loose Cable Systems?
ThermRite™ Loose Cable Systems offer ultimate flexibility for custom underfloor heating designs. Trusted by professionals and DIY enthusiasts alike, these cables combine durability, safety, and efficient heat output to deliver reliable warmth under a variety of floor types.
Select your required cable length and power output to create a heating system tailored precisely to your project needs.
- Type Electric Underfloor Heating
- Vendor ThermRite
Please note: Delivery times may vary depending on location, with specific details outlined below.
Standard Delivery
UK Mainland
- Delivery Time: 2–4 working days
- Free Delivery on all orders
Express Delivery
UK Mainland
- Delivery Time: 1–3 working days
- Delivery fee of £15
Channel Islands
- Postcodes Covered: GY*, IM*, JE*
- Minimum Order: £50
- Delivery Fee: £70
Northern Ireland, Offshore Territories & Scottish Islands
- Postcodes Covered: BT*, HS*, KW, ZE
- Minimum Order: £50
- Delivery Fee: £35
Same Day Delivery
- Eligible Postcodes:
E*, EC*, N*, NW*, SE*, SW*, W*, WC*, HA*, UB*, EN*, IG*, RM*, KT*, SM*, CR*, BR*, DA*, TW* - Minimum Order: £50
- Same Day Delivery Fee: £60
- Special Requests or Locations:
For areas outside these postcodes or urgent quotes, please email orders@qualityheating.co.uk and we’ll do our best to accommodate.
Collections
Want to collect your order instead?You’re welcome to do so — just email us at orders@qualityheating.co.uk or message us via WhatsApp with your preferred collection time, and we’ll confirm the details.
Collection address: 284 Water Rd, Unit 9, London, HA0 1HX