Lennox LSM40ST-N Installation Instructions Manual page 22

LENNOX HEARTH PRODUCTS • MONTEBELLO
hORIZONTAL VENT FIGURES/TABLES
hORIZONTAL TERMINATION SYSTEM WITh hORIZONTAL/INCLINED RUN USING TWO 90-DEGREE ELBOWS
(Elbow connection not directly at appliance)
Note: The provided vent restrictor is required in all venting systems.
See Page 14 for settings.
H
1
Example: If 20 feet of (H+H
horizontal vent run is needed,
then 10 feet minimum of (V)
vertical vent will be required.
See Table 8 on Page 21 as an aid in selecting venting
components for a particular range of exterior wall thicknesses.
Figure 32: Horizontal Termination with Two 90-Degree Elbows
hORIZONTAL TERMINATION SYSTEM WITh hORIZONTAL/INCLINED RUN USING ThREE 90-DEGREE ELBOWS
(Elbow connection not directly at appliance)
Note: The provided vent restrictor is required in all venting systems. See Page 14 for settings.
Horizontal
Firestop/Spacer
(SV8HF4)
See Table 8 on Page 21 as an aid in selecting venting
components for a particular range of exterior wall thicknesses.
Figure 33: Horizontal Termination with Three 90-Degree Elbows
22
SEE-THROUGH DIRECT-VENT GAS FIREPLACES (LSM40ST-N / LSM40ST-P) • INSTALLATION INSTRUCTIONS
®
(continued)
Horizontal Firestop/Spacer
(SV8HF4)
H
Horizontal Firestop/Spacer
(SV8HF4)
)
Vertical
1
Firestop/Spacer
(SV8BF)
H 1
Firestop/Spacer
V 1
Horizontal
Firestop/Spacer
(SV8HF4)
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
V
Vertical
(SV8BF)
H
Vertical
Firestop/Spacer
(SV8BF)
Table D
h max.
+ h
1
feet (meters) feet
3.5 (1.07) 2.5
6.5 (1.98) 3.5
8.5 (2.6) 4.5
10.5 (3.2) 5.5
12.5 (3.8) 6.5
14.5 (4.4) 7.5
16.5 (5.0) 8.5
18.5 (5.6) 9.5
20 (6.0) 10
V + h + h = 40 ft (12.4 m) max.
1
h + h = 20 ft (6.2 m) max.
1
Table E
h
+ h = 20 ft (6.2 m) max.
1
V h
+ V + + h = 40 ft (12.4 m) max.
1 1
V = 2.5 ft (0.762 m) min.
V
+ V = 11 ft (3.35 m) min.
1
V
V min.
(meters)
(0.762)
(1.07)
(1.37)
(1.68)
(1.98)
(2.3)
(2.6)
(2.9)
(3.0)