Heatilator Gas Fireplace GBFL4136I Owner's Manual page 21

Combustible Mantel Legs or Wall Projections
TOP VIEW
FIREPLACE
OPENING
Note: Clearance from
opening to perpendicular
wall.
Figure 5.8 Clearances to Combustible Mantel Legs or Wall
Projections (Acceptable on both sides of opening.)
SHEETROCK
AIR SPACE REQUIRED
Figure 5.9 Non-Combustible Zone
1/2 in.
Min.
2-3/4
in. Min.
Unlimited
1 in.
Max.
3-1/4 in. Min.
3-1/4 in.
Heatilator • GBST4336I, GBFL4136I • 2135-900 Rev. D • 11/08 21