Lennox Hearth ELITE CI2000HT User Manual
Page 8
8
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE
Listed Material
k (per inch)
r (per inch)
Listed Min. Thickness
Listed Material
.84
K
L
1.19
r
L
1/2
"
(.5")
T
L
** Approved Alternate Materials for Floor/Hearth Protection
Alternative Materials
Thermal Values
Minimum Thickness
(rounded to nearest 1/8 inch)
k (per inch)
K
M
r (per inch)
r
M
Min. Thickness
T
M
Kaowool M Board
.47
2.13
.28" (1/4")
Micore 160™
U.S. Gypsum
.35
2.86
.21" (1/4")
Micore 300™
U.S. Gypsum
.46
2.17
.27" (1/4")
Durock™ Cement Board
U.S. Gypsum
1.92
.52
1.14" (1-1/8")
Hardibacker™
1.95
.51
1.16" (1-1/8")
Hardibacker 500™
2.30
.43
1.37" (1-3/8")
Cultured Stone Hearth-
stone™
2.82
.35
1.68" (1-5/8")
Wonderboard
3.23
.31
1.92" (1-7/8")
Super Firetemp M
Johns-Manville
.61
1.64
.36" (3/8")
Super Firetemp L
Johns-Manville
.54
1.85
.32" (3/8")
Face brick
9.00
.111
5.36" (5-3/8")
Common brick
5.00
.20
2.98" (3")
Cement mortar
5.00
.20
2.98" (3")
Ceramic tile
12.5
.08
7.44" (7-1/2")
Marble
~11
~.09
6.55" (6-1/2")
Table 3
** If the hearth extension material(s) that is intended to be used is
NOT listed on Table 3, the material can still be used if the material(s)
is noncombustible. However, the manufacturer of the material must
provide either the listed k-value per inch or r-value per inch with listed
thickness so that the minimum thickness required for the hearth can
be calculated (per instructions on this Page and/or as specified in the
NFI Certification Manuals).
Note: Also see NFI (National Fireplace Institute) Certification Manuals
showing other acceptable calculation methods and acceptable alternate
materials which can be used.
Floor Protection - Model CI2000HT (USA and Canada)
Continued...
COMBUSTIBLE WALL CLEARANCE – USA & Canada
WARNING: It is very important that you observe the minimum
clearances.
There are listed clearances for your stove which were determined in a
Laboratory test using various “classes” of stove pipe or chimney. Mini-
mums are first established for the stove itself and increased based on
how much heat is transferred by each class of pipe.
Position the unit no closer than the minimum clearances to combustible
materials. Check that no overhead cross members in the ceiling or roof
will be cut. Reposition unit if necessary being careful not to move closer
than the minimum clearances.
Minimum Ceiling Height – 7 feet / 2133mm from floor to ceiling.
Single Wall Pipe Without Pipe Shield - CI1000HT
Using single wall 24 MSG black or 25 MSG blued steel connector pipe
with factory-built chimney listed to either UL 103HT or ULC S629.
Single Wall Pipe With Pipe Shield / Reduced Clearance -
CI1000HT
Using single wall 24 MSG black or 25 MSG blued steel connector pipe
with factory-built chimney listed to either UL 103HT or ULC S629. The
use of a pipe shield for 6” connector with 1” clearance to the pipe is
mandatory.
Minimum Clearances to Combustibles - inches (millimeters)
A
27-1/2” (699 mm)
D
24” (610 mm)
B
27” (686 mm)
E
18” (457 mm)
C
27” (686 mm)
F
19” (483 mm)
G
35-3/16” (894 mm) This is a reference dimension only
Table 4 - Model CI1000HT (see Figures 3 and 4)
Protected Wall Clearance - CI1000HT and CI2000HT
Some local codes will allow reduced clearances when the stove is
installed adjacent to a protected wall system. The variance must be
approved by your local building official. Normally, the protected wall
system is defined as a non- combustible material with a minimum of
1” air space behind. Check your local building codes or with a qualified
installer (Ref. NFPA 211).
Minimum Clearances to Combustibles - inches (millimeters)
A
21-1/2” (546 mm)
D
18” (457 mm)
B
27” (686 mm)
E
18” (457 mm)
C
19” (483 mm)
F
11” (279 mm)
G
23-7/8” (606 mm) This is a reference dimension only
Table 5 - Model CI1000HT (see Figures 3 and 4)
CLEARANCES - MODEL CI1000HT