LINK: https://www.comfortheat.com.au/wp-content/uploads/2023/05/ebrochure_electric_slab.pdf
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The Comfort Heat slab cable underfloor heating system is ideal for large residential areas and commercial buildings, can be used with all types of floor coverings and requires a new slab construction.

A popular option for large areas as in slab heating creates a large thermal mass, storing heat for long periods of time. In slab heating has slow response time, taking 10-24 hours to heat up, depending on temperature, slab thickness and insulation, but retains heat for a long time after power has been cut.

Ideal for areas that require all day heating as in slab heating can utilise cheaper off-peak electrical rates or daytime solar power and still maintain a warm home during the evening. In slab heating can be an excellent cost and energy efficient heating solution.

Create thermal mass in your slab that radiates all day long


The Comfort Heat in slab underfloor heating cable is attached to the reinforcing rods installed at 200mm centres [one direction only] or a slab reinforcing mesh at 200mm centres [i.e. F72]. The in slab cable requires a minimum of 30mm coverage over the cable for slab integrity.

Bottom and edge insulation is very important with in slab heating to prevent heat loss and ensure efficiency. Insulation is strongly advised.

For large areas Comfort Heat must be advised of any expansion joints in the slab as cable must not be installed over an expansion joint.


The in slab Comfort Heat underfloor heating cable is a multi-strand, double-insulated single cable system providing superior strength, preventing cable failure due to slab movement.

The in slab Comfort Heat underfloor heating cable has a heat output of 160W /m. Available in factory terminated lengths ranging from 29mts up to 168mts.


Comfort Heat provides technical diagrams, electrical loads and helpful tele-support for a seamless installation. Your project manager will need to coordinate with a licenced electrician, plumber and concrete contractor to ensure all trades have the specifications they require.


You require a licenced electrician to provide power, install conduits and connect the thermostat to complete your system. All floor heating electrical requirements are supplied for your electrician. [Accordance with standards AS/NZ3000:2000].


  • Cable is covered by minimum 30mm of slab
  • Insulation recommended under and around the slab
  • Slow responsive heat



Construction: Multi-stranded heating wire with double insulation, earth screen and sheath
Insulation: 4000 V
Rated Voltage: 230 Volt AC; Rated output 30W/m
Cold Tail Length: 3.5 metre with splice connection
Cable Diameter: 5mm
Cable Standard: IEC800 Class II
Cable Warranty: 10 years

What Slab Electric Underfloor Heating Questions Customers Ask?

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To find out more about underfloor heating, view our brochures or contact us to discuss all our products and services.

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