Heatilator • GDST4336I, GDFL4136I, GDCR4136I, GDCL4136I • 2129-900 Rev. W • 12/15
22
TOP VIEW
3-1/4 in. Min.
2-3/4
in. Min.
1/2 in.
Min.
Unlimited
1 in.
Max.
FIREPLACE
OPENING
Figure 5.10 Non-Combustible Zone
(GDFL4136I, GDST4336I)
Figure 5.9 Combustible Mantel Leg or Wall Projections
(Acceptable on both sides of opening)
Figure 5.11 Non-Combustible Zone (GDCR4136I and GDCL4136I)
SHEETROCK
AIR SPACE REQUIRED
3.5 in.
SHEETROCK
AIR SPACE REQUIRED
3.5 in.
Note:
Clearance from opening to perpendicular wall.