ThermoSphere Underfloor Heating Membrane Cable system (previously known as Vario Pro) is a system that combines an uncoupling membrane with an electric heating cable. Please note that the membrane is sold separately.
The ThermoSphere Underfloor Heating Cable is designed and manufactured in the UK – one of its unique features is a Twisted Twin Conductor cable design that neutralises cable stress and results in a supple, durable, quality cable. This cable is designed for installation into the
ThermoSphere Underfloor Heating Membrane and can be laid out in a completely flexible, custom layout that best suits your walkable/exposed floor area, as it can be laid around fixed items such as toilets, cabinets, baths, etc. We recommend using a ThermoSphere Thermostat with this cable. ThermoSphere Underfloor Heating Cables are available in the following sizes to suit a range of area sizes, as shown below. 2 dimples apart equates to a 195W/m² output, 3 dimples equates to a 130W/m² output. Please note that laying the cable 2 or 3 dimples apart changes the area coverage of the cable length, which is why there are two area coverage figures for each cable.
ThermoSphere Underfloor Heating Membrane Cable
Cable Length in Meters
Area Coverage (3 dimples, 130W/m²)
Area Coverage (2 dimples, 195W/m²)
Total Cable Power Output (W)
|12 Meters||1.15 m²||0.8 m²||150W|
|18 Meters||1.73 m²||1.15 m²||225W|
|25 Meters||2.31 m²||1.92 m²||300W|
|31 Meters||2.88 m²||1.92 m²||375W|
|37 Meters||3.46 m²||2.31 m²||450W|
|50 Meters||4.62 m²||3.08 m²||600W|
|61 Meters||5.77 m²||3.85 m²||750W|
|75 Meters||6.92 m²||4.62 m²||900W|
|100 Meters||9.23 m²||6.15 m²||1200W|
|125 Meters||11.54 m²||7.69 m²||1500W|
|150 Meters||13.85 m²||9.23 m²||1800W|
|200 Meters||18.46 m²||12.31 m²||2400W|
These cables cannot be cut or joined, but more than one cable can be joined to the same thermostat, as long as the total system load/draw is under 3600W/16A (the limit of all ThermoSphere Thermostats) – which equates to a floor heating area of approx. 23m².