Lennox Hearth Products Montebello LSM40MN-2 Installation Instructions Manual page 14

VERTICAL VENT FIGURES/TABLES (continued)
Figure 23
- Top Vent
TWO 90 DEGREE ELBOWS
H + Maximum
H
1
feet (meter)
10 (.1)
15 (4.65)
20 (6.2)
H + H = 20 feet (6.2 m) Max.
1
V + V + H + H
1
V + V = 11 feet (. meters) Min. for LSM40-2
1
V + V = 10.5 feet (.2 meters) Min. for LSM45-2
1
Figure 24 - Top Vent - THREE ELBOWS
14
H
Ceiling
Firestop/Spacer
(SV8BF)
V1
Table B
V Minimum
feet (meter)
2.5 (0.762)
.5 (1.06)
4.5 (1.7)
= 40 ft. (12.4 m) Max.
1
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
H Maximum
feet
10
15
20
V + V
1
V + V = 10.5 feet (.2 meters) Minimum for LSM45-2
1
V
Ceiling
Firestop/Spacer
V 1
(SV8BF)
H
H 1
Table A
V Minimum
(meter) feet
(.1) 2.5
(4.65) .5
(6.2) 4.5
V + V + H = 40 feet (12.4 meters) Max.
1
= 11 feet (. meters) Minimum for LSM40-2
Wall
Firestop/Spacer
(SV8HF)
V
(meter)
(0.762)
(1.07)
(1.7)