HE350 - Installation and Operation Manual
37
6.3.6
On the floor or on a raised base of less than 12" installation (2.00 R value for the hearth extension
required)
In the case where the fireplace is installed directly on the floor or on a raised base of less than 12", a 2.00 R
value for the hearth extension is required. In these case also, the joint between the hearth extension and
the fireplace (
E
) must be protected by piece of sheet metal (not included).
WARNING
•
THE FLOOR UNDER THE FIREPLACE SHOULD MATCH OR EXCEED THE HEIGHT OF THE FLOOR
PROTECTION.
•
A NON-COMBUSTIBLE HEARTH EXTENSION FLOOR AREA WITH A 2.00 R FACTOR MUST EXTEND AT
LEAST 32" (813 MM) IN FRONT OF THE FIREPLACE.
MINIMUM MEASUREMENT
E
2" (51 mm)
A noncombustible floor protection with R value insulation equal to or greater than 2.00 must be installed in
front of the unit. For more details see
6.3.7 - Minimum Hearth Extension Requirements.
The use of an R
value is convenient when more than one material is going to be used in the hearth extension to cover the
combustible surface. This is because R values are additive, whereas K values are not. To find the
corresponding R factor to use for some selected materials, please see
Table 1 : Thermal Characteristics of
Common Floor Protection Materials
*
.
