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Heat & Glo • ST-HVBI-AUB • 2082-980 Rev. B • 3/11
10" (254 mm)
12" (305 mm)
INTERIOR
WALL SHIELD
For Vertical Runs -
One fi restop is
REQUIRED
at the
hole in each ceiling through which the fl ue passes.
To install fi restops for vertical runs that pass through
ceilings:
• Position a plumb bob directly over the center of the
vertical fl ue component.
• Mark the ceiling to establish the centerpoint of the fl ue.
• Drill a hole or drive a nail through this center point.
• Check the fl oor above for any obstructions, such as
wiring or plumbing runs.
• Reposition the heater and fl ue system, if necessary,
to accommodate the ceiling joists and/or obstruc-
tions.
• Cut a 10" x 10" (254 mm X 254 mm) hole through the
ceiling, using the fi restop pipe opening as a guide.
• Frame the hole with framing lumber the same size
as the ceiling joists.
To install fi restops (heat shield) for horizontal runs that
pass through either interior or exterior walls:
• Cut a 10-inch by 12-inch (254 mm X 305 mm) hole
through the wall.
Figure 22. 254 mm x 305 mm Hole and Flue Pipe
D. Install Support Brackets
Refer to Cinch Pipe and Termination Cap installation
Instructions.
E. Install Firestops
For Horizontal Runs -
Firestops are
REQUIRED
on
both sides of a combustible wall through which the
fl ue passes.
• Position the fi restops on both sides of the hole
previously cut and secure the fi restops with nails or
screws.
• The heat shields of the fi restops
MUST BE
placed
towards the bottom of the fi restop.
• Continue the fl ue run through the fi restop.
Note:
Model DVP-TRAP2 does not need an exterior
fi restop on an exterior combustible wall. The fi restop is
built into the cap.
Note:
The center of the hole is one (1) inch (25.4 mm)
above the center of the horizontal fl ue pipe.
Note:
There must be NO INSULATION or other com-
bustibles inside the framed fi restop opening.
Figure 23. Heat Shield, Interior & Exterior Firestops
TRIM HEAT
SHIELD IF TOO
LONG, ADD TO
SHIELD IF TOO
SHORT
EXTERIOR
FIRESTOP
INTERIOR
FIRESTOP
HEAT SHIELD
Figure 24. Hole & New Framing Members
CEILING
NEW
FRAMING
MEMBERS
EXISTING CEILING
JOISTS
CHIMNEY
HOLE
10" (254 mm)
10” (254 mm)