HomeFloor HeatingElectricIn-Slab Cable

Inslab Cable System

The Inslab Cable is designed for use within a concrete floor construction.

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Floor Type

icon-checkmark  All Floor Coverings

Room Type

icon-checkmark  Large & Small Areas

icon-checkmark  Regular & Irregular Shape

Build Type

icon-checkmark  New Construction

icon-checkmark  Renovation

Subfloor Type

icon-checkmark  Slab & Concrete Slab

Best suited for

The Inslab cable system is designed for installation in concrete slab of 2″ to 4″ (50mm to 100mm). If insulation is absent or beneath more than 4″ (100mm) of concrete subfloor, insulation boards must be used to ensure optimum heat-up times.

The Inslab cable system is for installation within concrete floors, and is ideal for new constructions where floor height is not an issue. This heating cable is suitable for almost any flooring finish and in particular where the flooring (wood, carpet, vinyl) may be replaced from time to time.

The slower heat-up and cool-down time of the Inslab cable makes it particularly suitable for rooms which are in constant use, as the slab can be used as a form of storage heating, making effective use of cheaper, low-tariff energy usage.


Safety Net Installation Guarantee

If you accidentally damage the heating system during installation, return it to Warmup and we will replace it with another heater of the same make and model free.

10-Year Limited Warranty

This product comes with a 10-Years Warranty. We are completely confident in the standard of our products.

Operating voltage 120V, 240V and 208V (de-rated)
Cable thickness 3/8″ (10mm)
Output rating 5.5W/linear foot
Coil tail length A16.4″ (610cm)
Cable length tolerance +/- 5%
Max Operating Temp. 464°F (240°C)
Approvals cULus


Area to be heated Wattage (W) AMPS Resistance OHMS
7-12 sq ft 150 1.3 92.30
14-26 sq ft 350 2.9 41.40
23-36 sq ft 475 4.0 30.00
31-52 sq ft 650 5.4 22.15
42-65 sq ft 850 7.1 16.90
57-92 sq ft 1200 10.0 12.00



Area to be heated Wattage (W) AMPS Resistance OHMS
24-39 sq ft 500 2.1 114.30
44-74 sq ft 950 4.0 60.00
62-104 sq ft 1300 5.4 44.40
76-130 sq ft 1700 7.1 33.80
105-182 sq ft 2400 10.0 24.00
155-260 sq ft 3400 14.2 16.90

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Insulation Boards

Using Insulation Boards with under floor heating significantly reduces the heat-up times and running costs.

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