Heatilator • GDST4336I, GDFL4136I, GDCR4136I, GDCL4136I • 2129-900 Rev. F • 11/0822
TOP VIEW
3-1/4 in. Min.
2-3/4
in. Min.
1/2 in.
Min.
Unlimited
1 in.
Max.
FIREPLACE
OPENING
Note: Clearance from
opening to perpendicular
wall.
Figure 5.10 Non-Combustible Zone (GDFL4136I, GDFL4136,
GDST4336I, and GDST4336)
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.