Carpet and underlay, effect on heating

In general a firmer, thinner, carpet or underlay is more suitable than a thicker material as thick carpet or underlay can reduce the heat output of the floor and reduce performance in cold weather. Felt underlays in particular should be avoided since they always have a high insulation level.



The choice of carpet and underlay should include consideration of their thermal insulation value, known as Tog rating. A high Tog rating indicates a high insulation level (good in a quilt but undesirable on top of underfloor heating). Tog ratings for carpets and underlays are available from reputable manufacturers and should be obtained wherever possible. In practise the combined insulation value of underlay and carpet added together should be no more than 2.5 Tog.



Nu-Heat designers use the company’s unique Optimiser™ software program to consider the thermal resistance of the floor coverings and establish the quantity and spacing of heating tube required within each room. As a result, Nu-Heat can always be confident that our system will fully heat your home.



View carpet data sheet