Ouellet OTM - Manual (Page 12)

Do not install a radiant floor heating system on a noninsulated or poorly
insulated subfloor, or over a crawl space.
The efficiency of this type of primary room heating system will depend on
factors such as surface area, heat conductivity of the floor covering, insula-
tion on outside walls, etc. We recommend that you verify these points and
seek professional advice before inves ting time and money.
3.3 Typical Floor Coverings
The thermal resistance of the floor covering must not exceed R = 1.40 (RSI = 0.246).
There is no such limit for the subfloor.
Table 3.3 Thermal resistance values for floor coverings
* The floor covering highlighted in grey is prohibited.
For engineered wood floorings, laminated hardwood flooring, vinyl coverings,
and linoleum glued to a concrete surface, consult your floor covering manu-
facturer to ensure they are compatible with floor heating systems.
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Typical floor covering
Thermal resistance
R RSI
Vinyl tiles 0.20 0.035
Linoleum 0.22 0.039
Ceramic 0.25 0.044
Low-pile carpet 0.70 0.123
Parquet flooring 0.70 0.123
Floating floor 10 mm to 16 mm (3/8” to 5/8”) 0.70 0.123
Wood on lathes (strapping)* 2.10 0.368
IMPORTANT