ThermoSphere Ultimate Loose Lay Underfloor Electric Heating Cable
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ThermoSphere Ultimate Loose Lay Underfloor Electric Heating Cable
The ThermoSphere Ultimate Loose Lay Heating Cable is a versatile, high-performance electric underfloor heating solution designed for easy installation on decoupling membrane mats, insulation boards, or suitable subfloors. Featuring In-Line Joint Technology and a unique loose lay design, this cable offers precise heat control and flexible layout options ideal for both domestic and commercial applications.
Key Features
- In-Line Joint Technology for enhanced cable durability and safety
- Compatible with all ThermoSphere decoupling membrane mats and insulation systems
- Loose lay design allows cables to be laid out in straight runs and cut-and-return configurations for perfect room coverage
- Available in two heating densities depending on cable spacing:
- 195W/m² – Dense spacing (2 studs apart) for rooms with higher heat loss such as conservatories and utility rooms
- 130W/m² – Wider spacing (3 studs apart) suited for general living areas and bedrooms
- Continuous metallic earth braid for superior earthing and electrical protection
- Durable fibre-glass insulation and durable cable sheath rated for long-term underfloor heating use
- IPX7 water resistance and rated for wet area use when installed with compatible membranes
- Fast and straightforward installation with fixings recommended for secure cable layout
- Compatible with a wide range of thermostats and control systems
- Lifetime product warranty for long-term peace of mind
ThermoSphere Ultimate Cable Sizes and Outputs
| Product Code | Cable Length (m) | Coverage Area at 130W/m² (m²) | Coverage Area at 195W/m² (m²) | Power Output (W) | Resistance (Ω) |
|---|---|---|---|---|---|
| HDMC-012-0150J | 12 | 1.15 | 0.77 | 150 | 352.67 |
| HDMC-018-0225J | 18 | 1.73 | 1.15 | 225 | 235.11 |
| HDMC-025-0300J | 25 | 2.31 | 1.54 | 300 | 176.33 |
| HDMC-031-0375J | 31 | 2.88 | 1.92 | 375 | 141.07 |
| HDMC-037-0450J | 37 | 3.46 | 2.31 | 450 | 117.56 |
| HDMC-042-0525J | 42 | 3.90 | 2.60 | 525 | 100.76 |
| HDMC-050-0600J | 50 | 4.62 | 3.08 | 600 | 88.17 |
| HDMC-055-0675J | 55 | 5.10 | 3.40 | 675 | 78.37 |
| HDMC-061-0750J | 61 | 5.77 | 3.85 | 750 | 70.53 |
| HDMC-075-0900J | 75 | 6.92 | 4.62 | 900 | 58.78 |
| HDMC-090-1080J | 90 | 8.32 | 4.99 | 1080 | 48.98 |
| HDMC-100-1200J | 100 | 9.23 | 6.15 | 1200 | 44.08 |
| HDMC-125-1500J | 125 | 11.54 | 7.69 | 1500 | 35.27 |
| HDMC-150-1800J | 150 | 13.85 | 9.23 | 1800 | 29.39 |
| HDMC-175-2100J | 175 | 16.17 | 10.78 | 2100 | 25.19 |
| HDMC-200-2400J | 200 | 18.46 | 12.31 | 2400 | 22.04 |
Technical Specifications
- Voltage: 230V AC
- Heating Cable Diameter: approx. 6 mm
- Insulation: High quality, durable fibre-glass
- Continuous earth braid for enhanced safety
- IPX7 water resistance rating
- Installation: Loose lay cable, suitable for use on ThermoSphere decoupling membranes and other approved subfloors
- Suitable for use in domestic and commercial spaces, including wet rooms
- Compatible with a variety of thermostat and control options (sold separately)
- Minimum installation temperature: 5°C
Installation and Usage Recommendations
- Lay the cable loosely on the chosen substrate, securing it with suitable fixing clips or ties
- Cable can be arranged in straight runs or cut-and-return loops for precise room coverage
- Maintain recommended cable spacing for the desired heat output (130W/m² or 195W/m²)
- Ensure cable is connected via a cold lead to a suitable thermostat and floor temperature sensor for accurate control and energy efficiency
- Perform insulation resistance testing before and after installation to ensure safety and warranty compliance
- Do not cut or shorten the heating cable core—only the cold lead may be adjusted
Available (Self-Adhesive) Peel & Stick Mats
The ThermoSphere Self-Adhesive Decoupling Membrane is a premium polypropylene membrane designed to provide superior waterproofing, decoupling, and vapour management for electric underfloor heating systems.
| Size | Dimensions | Coverage | Format |
|---|---|---|---|
| 1 m² | 1000 x 1000 mm | Single self-adhesive panel | Peel and stick panel |
| 15 m² | 1000 x 15000 mm | Roll for larger installations | Peel and stick roll |
Available Membrane Fleece Mats
The ThermoSphere Underfloor Heating Decoupling Membrane Mat with fleece backing is a patented polypropylene membrane designed to provide a combined electric heating, decoupling, waterproofing, load-bearing, and vapour management solution for tiled and stone floors.
| Product Size | Dimensions (mm) | Thickness | Coverage Area | Installation Format |
|---|---|---|---|---|
| 1 m² | 1000 x 1000 | 5.5 mm | Single square panel | Sold per individual m² panel |
| 5 m² | 1000 x 5000 | 5.5 mm | Roll, suitable for larger floor areas or custom layouts | Flexible cut-to-fit roll |
| 15 m² | 1000 x 15000 | 5.5 mm | Large roll ideal for extensive heating installations | Flexible cut-to-fit roll |
Why Choose ThermoSphere Ultimate Loose Lay Cable?
ThermoSphere Ultimate Loose Lay Heating Cable combines industry-leading technology, ease of installation, and reliable performance for efficient underfloor heating. Its flexible, durable design with In-Line Joint technology ensures longevity and safety, making it ideal for a wide array of room sizes and heating demands. Supported by ThermoSphere’s lifetime warranty, it provides peace of mind and year-round comfort in any home or commercial environment.
Order your ThermoSphere Ultimate Loose Lay Heating Cable today and experience flexible, efficient, and safe electric underfloor heating tailored to your flooring needs.
- Type Electric Underfloor Heating
- Vendor ThermoSphere
- SKU HDM-SA-001
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