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E. Install Support Brackets
For Horizontal Runs - The flue system must be supported
every five (5) feet (1,52 m) of horizontal run by a horizontal
pipe support. To install support brackets for horizontal runs:
• Place the pipe supports around the flue pipe.
• Nail the pipe supports to the framing members.
For Vertical Runs - The flue system must be supported
every eight (8) ft. (2,44 m) above the fireplace flue outlet by
wall brackets. To install support brackets for vertical runs:
• Attach wall brackets to the flue pipe and secure the wall
bracket to the framing members with nails or screws.
F. Install Firestops
For Horizontal Runs - Firestops are REQUIRED on both
sides of a combustible wall through which the flue passes.
To install firestops (heat shield) for horizontal runs that pass
through either interior or exterior walls:
• Cut a 10 inch by 12 inch (25,4 cm X 30,5 cm) hole through
the wall.
• Position the firestops on both sides of the hole previously
cut and secure the firestops with nails or screws.
• The pipe opening of the firestops MUST BE placed
towards the bottom of the firestop.
• Continue the flue run through the firestop.
INTERIOR
WALL SHIELD
Figure 10.8 Flue Pipe & Firestop
For Vertical Runs - One 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 verti-
cal flue component.
• Mark the ceiling to establish the centerpoint of the flue.
• Drill a hole or drive a nail through this center point.
• Check the floor above for any obstructions, such as wir-
ing or plumbing runs.
• Reposition the fireplace and flue system, if necessary,
to accommodate the ceiling joists and/or obstructions.
10 in. (25,4 cm)
12 in. (30,5 cm)
Heat & Glo • 350TSI-P-CEM • 2033-973 Rev. G • 4/17
• Cut a 25,4 cm X 25,4 cm hole through the ceiling when
using DVP pipe, and a 22,9 cm x 22,9 cm hole when using
SLP pipe. Use the firestop pipe opening as a guide.
• Frame the hole with framing lumber the same size as
the ceiling joists.
A
NEW
FRAMING
MEMBERS
CEILING
SLP
DVP
Figure 10.9 Hole and New Framing Members
If the area above the ceiling is NOT an attic, position
and secure the ceiling firestop on the ceiling side of the
previously cut and framed hole.
CEILING
NAILS (4 REQUIRED)
Figure 10.10 Ceiling Firestop (Ceiling Side)
B
CHIMNEY
HOLE
EXISTING CEILING
JOISTS
A
B
22,9 cm
22,9 cm
25,4 cm
25,4 cm
JOIST
CEILING FIRESTOP
43
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