20
For Vertical Runs
The flue system must be supported every eight
(8) feet (2.4M) above the heater flue outlet by wall
brackets.
To install support brackets for vertical runs:
• Attach wall brackets to the flue pipe and se-
cure the wall bracket to the framing members
with nails or screws.
Use wall brackets to support vertical runs every
8 feet (2.4M) above the heater flue outlet.
Figure 18 Installing Support Brackets
4. Install Firestops
For Horizontal Runs - Firestops are REQUIRED
on both sides of a combustible wall through which
the flue passes.
To install firestops for horizontal runs that pass
through either interior or exterior walls:
• Cut a 12-inch by 12-inch (305 mm X 305 mm)
hole through the wall for D-series or a 10-inch by
10-inch (254mm x 254mm) hole for SL D-series
pipe. The center of the hole is one (1) inch
(25mm) above the center of the horizontal
flue pipe.
• Position the firestops on both sides of the hole
previously cut and secure the firestops with nails
or screws.
• The heat shields of the firestops MUST BE
placed towards the top of the hole.
• Continue the flue run through the firestops.
Figure 19 Hole and Flue Pipe
Figure 20 Heat Shield, Interior and Exterior
Firestops
For Vertical Runs - One ceiling 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 vertical flue component.
• Mark the ceiling to establish the centerpoint of
the flue.
FLUE PIPE
1" (25mm)
12" (305mm)
12" (305mm)
TRIM HEAT
SHIELD IF TOO
LONG, ADD TO
SHIELD IF TOO
SHORT
EXTERIOR
FIRESTOP
INTERIOR
FIRESTOP
HEAT SHIELD
WALL BRACKET
WALL STUD
8 FT.
(2.4mm)
FLUE
OUTLET
1 INCH MIN.
(25mm)
