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8
NOTE: DIAGRAMS AND ILLUSTRATIONS ARE NOT TO SCALE
A
B
C
D
E
F
G
H
I
C
L
Figure 2 - Existing Fireplace Minimum Dimensions
Figure 3 - Minimum Clearances
Combustibles Trim or Mantel Depth of 8” or Less
Hearth Protection
Mantel - 12” Depth
Minimum Fireplace Dimensions
and Minimum Clearances
Inches
(millimeters)
A Minimum front opening required 36 (914)
B Minimum height required 21-1/2 (546)
C Minimum rear width required 19-1/2 (495)
D Minimum fireplace depth required 16 (406)
E Clearance needed from bottom of insert to com-
bustibles or 8” mantel
35 (889)
F Clearance required from center of glass to com-
bustible material
30 (762)
G Minimum inches of hearth protection needed from
front of unit
12 (305)
H Vertical clearance needed under the bottom of the
insert for NO hearth protection
8 (203)
I Clearance needed from bottom of insert to 12”
mantel
38 (965)
Table 4
Refer to Table 4
Refer to Table 4
Refer to Figures 2 through 4
These appliances can be installed in most fireplace configurations. If
installed close to an adjacent wall, ensure that the minimum clearances
to combustible surfaces are maintained. A local building inspector
should review your plans prior to installation.
Refer to Figures 2 through 4 for clearances to combustibles. Minimum
clearances
include any projections such as shelves, window sills, mantels,
spacers/standoffs or surfaces to combustible construction
etc. above the
appliance. Paint or lacquer used to finish the mantel must be heat resistant
in order to avoid discoloration.
Examples:
Hearths that are level with the base
of the insert require 12” minimum of
forward hearth protection.
Hearths that are elevated 8” minimum
above combustible floor require 0” of
forward hearth protection.
G
H
Combustible Floor
Figure 4 - Hearth Protection
G H
H dimension deter-
mines G minimum
0” 8”
1-1/2”
7”
3” 6”
4-1/2”
5”
6” 4”
7-1/2”
3”
9” 2”
10-1/2”
1”
12”
0”
Hearth Protection
Fireplace Firebox
Insert
MINIMUM CLEARANCES TO COMBUSTIBLES
Hearth / Floor Protection Requirements
The hearth and/or floor protection must be a thermally rated hearth/floor
protector meeting or exceeding a thermal rating of k = .84 (or lower) or
r= 1.19 (or higher) with a listed thickness of 1" minimum. If an hearth
extension is used, check with the manufacturer for the listed thermal rating
of the hearth extension to ensure it meets the thermal requirements of k
= .84, r= 1.19, listed thickness 1". If a custom hearth or floor protection
is planned, see NFI (National Fireplace Institute) certification manuals
showing methods for calculating minimum thicknesses and approved
fireplace hearth/floor protection materials.