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Hearth & Home Technologies • BE-36-C, BE-36-CIPI • 397-981 Rev. R • 2/05
25
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 22 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 20. Hole and Vent Pipe
Figure 21. 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.
V
ENT PIPE
1" (25.4 mm)
12"(DVP) or 10" (SL)
(305mm or 254mm)
10"
(254mm)
NOTE: There must be NO INSULATION or other
combustibles inside the framed firestop opening.