According to research from and the underfloor heating manufacturers association uhma and advice from the carpet foundation you should be looking for a combined tog rating of less than 2 5 for your carpet and underlay for underfloor systems to operate efficiently.
Carpets for underfloor heating.
The total tog of all materials including any under and overlays must not exceed 2 5 tog in order for the system to provide sufficient heat output.
The warmup foil heater is an electric underfloor heating system for carpet but also vinyl wood and other floating floor finishes.
Neither carpet nor underlay are great conductors of heat so the lower the tog.
The foil heater is made up of a fiber reinforced foil wrapped around a thin multi strand dual core heating cable that is insulated with an advanced fluoropolymer.
Electric underfloor heating is ideal for carpet as long as the tog values don t.
Carpets are the traditional floor covering for bedrooms and living areas.
The combined value of the carpet and underlay should not exceed 2 5 tog and preferably less than 1 5 for heat pump systems.
Carpet is suitable for use with underfloor heating provided that the material of the carpet or underlay does not act as an insulator blocking the heat.
7 key points to safely using electric underfloor heating under carpeted floors 1.