31
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 verti-
cal vent component.
• Mark the ceiling to establish the centerpoint of the vent.
• Drill a hole or drive a nail through this centerpoint.
• Check the floor above for any obstructions, such as wir-
ing or plumbing runs.
• Reposition the fireplace and vent system, if necessary,
to accommodate the ceiling joists and/or obstructions.
• Cut a 10-inch X 10-inch (254mm X 254mm) hole through
the ceiling, using the centerpoint previously marked.
• Frame the hole with framing lumber the same size as the
ceiling joists.
NOTE: There must be NO INSULATION or other
combustibles inside the framed firestop opening.
Figure 26. Hole & New Framing Members
CEILING
NEW
FRAMING
MEMBERS
EXISTING CEILING
JOISTS
CHIMNEY
HOLE
10" (254mm)
10" (254mm)
• 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. Hole and Vent Pipe
Figure 25. Heat Shield, Interior & Exterior Firestops
TRIM HEAT
SHIELD IF TOO
LONG, ADD TO
SHIELD IF TOO
SHORT
EXTERIOR
FIRESTOP
INTERIOR
FIRESTOP
HEAT SHIELD
DVP, SL-D and SL-Flex Series Venting:
STEP 4. Install Firestops
For Horizontal Runs -
Firestops are
REQUIRED
on both
sides of a combustible wall through which the vent passes.
NOTE: Model DVP-TRAP or SLK-01TRD 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 12” x 10“ (305mm x 25mm) hole through the wall for
DVP-series or a 10” x 10” (254mm x 254mm) hole for SL-D-
series pipe. The center of the framing hole is one (1) inch
(25.4mm) above the center of the horizontal vent pipe.
VENT PIPE
1" (25.4 mm)
12"(DVP) or 10"
(305mm or
254mm)
10"
(254mm)
NOTE: There must be NO INSULATION or other
combustibles inside the framed firestop opening.
