Lennox Hearth Products Montebello LSM40MN-2 Installation Instructions Manual page 18

HORIZONTAL VENT FIGURES/TABLES
(continued)
H 1
See Table 6 on Page 17 as an aid in venting component selection for a particular range of
exterior wall thicknesses.
Figure 29
- Top Vent - TWO 90 DEGREE ELBOWS
H 1
Wall Firestop/Spacer
(SV8HF)
See Table 6 on Page 17 as an aid in venting component selection for a particular range of exterior wall thicknesses.
Figure 30
- Top Vent - THREE 90 DEGREE ELBOWS
18
Wall Firestop/Spacer
(SV8HF)
H
Wall Firestop/Spacer
(SV8HF)
Ceiling
Firestop/Spacer
(SV8BF)
Ceiling
Firestop/Spacer
(SV8BF)
H
V 1
Wall
Firestop/Spacer
Firestop/Spacer
(SV8HF)
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
V
V
Ceiling
(SV8BF)
Table D
V Minimum
H Maximum
+ H
1
feet (meter) feet
.5 (1.07) 2.5
6.5 (1.98) .5
8.5 (2.6) 4.5
10.5 (.2) 5.5
12.5 (.8) 6.5
14.5 (4.4) 7.5
16.5 (5.0) 8.5
18.5 (5.6) 9.5
20 (6.0) 10
H
V + + H = 40 feet (12.4 m) Max.
1
H
+ H = 20 ft. (6.2 m) Max.
1
Table E
H
+ H = 20 feet (6.2 m) Max.
1
V H
+ V + + H = 40 ft. (12.4 m) Max.
1 1
V = 2.5 feet Min. (0.762 m)
V + V = 11 feet (.5 m) Min. for LSM40-2
1
V
+ V = 10.5 feet (.2 m) Min. for LSM45-2
1
(meter)
(0.762)
(1.07)
(1.7)
(1.68)
(1.98)
(2.)
(2.6)
(2.9)
(.0)