27
TRIM HEAT
SHIELD IF TOO
LONG, ADD TO
SHIELD IF TOO
SHORT
EXTERIOR
FIRESTOP
INTERIOR
FIRESTOP
HEAT SHIELD
• 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 flue run through the firestops.
1. Cut the hole through
the wall.
Figure 19. Hole and Flue Pipe
2. Position the firestops.
3. Place the heat shield
to the top.
4. Continue the flue run.
Figure 20. Heat Shield, Interior and Exterior
Firestops
For Vertical Runs -
One ceiling firestop is
REQUIRED
at the hole in each ceiling through which
the flue passes.
To install firestops for vertical runs that pass through
ceilings:
• Position a plumb bob directly over the center of the
vertical flue component.
• Mark the ceiling to establish the centerpoint of the
flue.