Clearances To Combustibles - Lennox Hearth Products Shoreline 33/40 DV INS Installation And Operation Manual

MINIMUM CLEARANCES TO COMBUSTIBLES
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.
Minimum Fireplace Dimensions
and Minimum Clearances
A Minimum front opening required
B Minimum height required
C Minimum rear width required
D Minimum fireplace depth required
E Clearance needed from bottom of insert to com-
bustibles or 8" mantel
F Clearance required from center of glass to com-
bustible material
G Minimum inches of hearth protection needed from
front of unit
H Vertical clearance needed under the bottom of the
insert for NO hearth protection
I Clearance needed from bottom of insert to 1"
mantel
Table 4 Refer to Figures 2 through 4
Figure 2 - Existing Fireplace Minimum Dimensions
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.
8
A
B
C
D
Refer to Table 4
NOTE: DIAGRAMS AND ILLUSTRATIONS ARE NOT TO SCALE
Inches
(millimeters)
36 (914)
G
1-1/ (546)
19-1/ (495)
16 (406)
Figure 3 - Minimum Clearances
35 (889)
30 (76)
Fireplace Firebox
1 (305)
8 (03)
38 (965)
G
H dimension deter-
mines G minimum
0"
1-1/"
3"
4-1/"
6"
7-1/"
9"
10-1/"
1"
Figure 4 - Hearth Protection
Mantel - 1" Depth
Combustibles Trim or Mantel Depth of 8" or Less
E
C L
Hearth Protection
Insert
Hearth Protection
G
H
H
Combustible Floor
8"
7"
6"
Examples:
5"
Hearths that are level with the base
4"
of the insert require 1" minimum of
forward hearth protection.
3"
Hearths that are elevated 8" minimum
"
above combustible floor require 0" of
forward hearth protection.
1"
0"
F
I
H
Refer to Table 4