Heatilator GDST4336I Owner's Manual page 23

TOP VIEW
FIREPLACE
2-3/4
OPENING
in. Min.
3-1/4 in. Min.
Note: Clearance from opening to perpendicular wall.
Figure 5.9 Combustible Mantel Leg or Wall Projections
(Acceptable on both sides of opening)
SHEETROCK
3.5 in.
AIR SPACE REQUIRED
Figure 5.10 Non-Combustible Zone (GDFL4136I, GDFL4136,
GDST4336I, and GDST4336)
SHEETROCK
3.5 in.
AIR SPACE REQUIRED
Figure 5.11 Non-Combustible Zone (GDCR4136I and GDCL4136I)
Heatilator • GDST4336I, GDFL4136I, GDCR4136I, GDCL4136I, GDST4336, GDFL4136 • 2129-900 Rev. P • 8/14
1/2 in.
Min.
Unlimited
1 in.
Max.
23