11
07/20
7101-802G
NOTE:
Clearances may only be reduced by means
approved by the regulatory authority having jurisdiction
NOTE:
Hearth Rug may be used in Suggested Area
0 to 4.5 inches from bottom of unit,
thermal protection required. R
value of 2.9.
4.5 inches or more from bottom of
unit, ember protection only
required
Figure 3.17
Material
Thermal Resistance: R value
The R value is a measure of a material’s resistance to
heat transfer.
R value is convenient when more than one material is used
since you can add the R values together, whereas you can
not do this for k value.
The HIGHER the R factor means less heat is being
conducted through the non-combustible material to the
combustible material beneath it.
The R value of a material must be equal or larger then the
required R value to be acceptable.
Fire Risk.
• Comply with all minimum clearances to
combustibles as specified.
•
Failure to comply may cause house fire.
WARNING
!
