Quadra-Fire • QV36DB-A • 2018-900 Rev. F • 12/07
22
5. Install Firestops
For Horizontal Runs -
Firestops are
REQUIRED
on both
sides of a combustible wall through which the vent passes.
NOTE: Model DVP-TRAP does not need an exterior
firestop on an exterior combustible wall.
To install firestops for horizontal runs that pass through
either interior or exterior walls:
• Cut a 10-inch by 12-inch (254mm X 305mm) hole through
the wall.
NOTE: The center of the hole is one (1) inch (25.4mm)
above the center of the horizontal vent pipe.
• Position the firestops on both sides of the hole previ-
ously cut and secure the firestops with nails or screws.
• The heat shields of the firestops
MUST BE
placed to-
wards the top of the hole.
• Continue the vent run through the firestops.
Figure 24. Heat Shield, Interior & Exterior Firestops
TRIM HEAT
SHIELD IF TOO
LONG, ADD TO
SHIELD IF TOO
SHORT
EXTERIOR
FIRESTOP
INTERIOR
FIRESTOP
HEAT SHIELD
NOTE: There must be NO INSULATION or other
combustibles inside the framed firestop opening.
Figure 23. 10" x 12" Hole and Vent Pipe
10"
12"
INTERIOR
WALL SHIELD
