Neither carpet nor underlay are great conductors of heat so the lower the tog.
Carpets for underfloor heating.
The combined value of the carpet and underlay should not exceed 2 5 tog and preferably less than 1 5 for heat pump systems.
Carpets are the traditional floor covering for bedrooms and living areas.
Electric underfloor heating is ideal for carpet as long as the tog values don t.
Tog value of the carpet and underlay.
The assumption is that because a carpet insulates it will prevent an underfloor heating system from adequately heating a room and while wood engineered floors are all the rage lots of people still like the comfort under their feet that a carpet provides in a bedroom.
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.
The warmup foil heater is an electric underfloor heating system for carpet but also vinyl wood and other floating floor finishes.
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.
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.