Filter
Top Products
32
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
A
A
A
B
C*
Overhang
Siding
Siding
Siding
Trim
Figure 56: Exterior Clearances
Combustible Sheathing
Non-Combustible Board
Non-Combustible Board
Combustible Sheathing
A
B B
C
Figure 55: Sheathing
Exterior Minimum Clearances
Material A B C*
Vinyl 12” (305 mm) 35-1/2” (902 mm) 6” (305 mm)
Non-Vinyl 7” (178 mm) 35-1/2” (902 mm) 6” (305 mm)
*Dimension “C” is clearance required from fireplace base to surface
(e.g., deck, patio, lanai) as a moisture barrier (not a combustible
clearance) on outdoor side only.
Sheathing Requirements
A B C*
12” (305 mm) 7” (178 mm) 6” (152 mm)
*Dimension “C” is clearance required from fireplace base to surface
(e.g., deck, patio, lanai) as a moisture barrier (not a combustible
clearance) on outdoor side only.
Non-Combustible Board
LENNOX HEARTH PRODUCTS • MONTEBELLO
®
SEE-THROUGH DIRECT-VENT GAS FIREPLACES (LSM40ST-N / LSM40ST-P) • INSTALLATION INSTRUCTIONS