The best carpets to use with underfloor heating are those with tog ratings of less than 1 5.
Carpet less than 1 5 tog.
If you are wanting an underlay for hard flooring then a tog rating of less than 0 4 is ideal.
Suppliers however have stated that carpet must have a thermal resistance of no more than 1 5 1 7 tog.
Tolerances for the dimensions of tufted and woven carpet.
0 n narrow loom widths usually woven only are 0 69m 0 9m l 0m 2 0m.
A lightweight 60 90 oz sponge underlay generally has a relatively low tog rating of 0 5 which makes this type of underlay most suitable for use with underfloor heating.
This is not the case.
However research conducted by bsria in bracknell and funded by the carpet foundation in conjunction with the underfloor heating manufacturers association uhma has proved conclusively that any carpet can be used with an underfloor heating system without impairing the performance of the system.
Quality manufacturers will have technical information on their products available to customers.
Underfloor heating is growing in popularity.
In conjunction with the underfloor heating manufacturers association the carpet foundation carried out a research project.
The combined value of the carpet and underlay should not exceed 2 5 tog and preferably less than 1 5 for heat pump systems.
Heat exchange between floor surface and carpet is further insulated by the type of underlay used.
Please note that the insulating effect of underlay and carpet are to some extent cumulative.
This showed that a carpet underlay with a combined thermal resistance of less than 2 5 togs allows underfloor systems to operate efficiently.
As nzs 1385 specifies the following commercial tolerances for.
Tog values typical brintons 80 wool 20 nylon carpets have a tog value 1 4 and 2 3.
As well as the tog rating of the carpet you must also consider the tog rating of the underlay.
We would suggest a target tog should be 0 8 or less.
Our 80 wool 20 nylon carpets have a tog value somewhere between 1 4 and 2 3.
The previous industry standard has been to advise that the carpet and underlay should not exceed a tog rating of 1 5.
Figures between 0 80 and 1 50 tog have been quoted by manufacturers foam underlays generally have a lower tog rating than felts.
If you are looking for an underlay for underfloor heating in combination with a carpet this is quite a specialist requirement.