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TRIM HEAT
SHIELD IF TOO
LONG, ADD TO
SHIELD IF TOO
SHORT
EXTERIOR
FIRESTOP
INTERIOR
FIRESTOP
HEAT SHIELD
Figure 20. 12" x 12" Hole and Vent Pipe
2. Position the
firestops.
3. Place the heat
shield to the top.
4. Continue the vent
run.
Figure 21.
Heat Shield, Interior & Exterior Firestops
For Vertical Runs - One ceiling firestop is
REQUIRED at the hole in each ceiling through
which the vent passes.
To install firestops for vertical runs that pass through
ceilings:
Position a plumb bob directly over the center of
the vertical vent component.
Mark the ceiling to establish the centerpoint of the
vent.
Position the firestops on both sides of the hole
previously cut and secure the firestops with nails or
screws.
The heat shields of the firestops MUST BE placed
towards the top of the hole.
Continue the vent run through the firestops.
1. Cut the 12-inch by
12-inch hole.