14
For Vertical Runs
The flue system must be supported every eight (8) feet
(2.4 M) above the heater 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.
Use wall brackets to support vertical runs every 8 feet
(2.4 M) above the heater flue outlet.
FIGURE 15. 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. 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 pre-
viously 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 16. Hole and Flue Pipe
FIGURE 17. 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.
TRIM HEAT
SHIELD IF TOO
LONG, ADD TO
SHIELD IF TOO
SHORT
EXTERIOR
FIRESTOP
INTERIOR
FIRESTOP
HEAT SHIELD
FLUE PIPE
1" (25mm)
12" (305mm)
12" (305mm)
WALL BRACKET
WALL STUD
8 FT.
(2.4m)
FLUE
OUTLET
1 INCH MIN.
(25mm)