For Vertical Runs - The vent system must be supported every eight (8) feet (2.4m) above the fireplace flue outlet by wall brackets.
To install support brackets for vertical runs:
•Attach wall brackets to the vent pipe and secure the wall bracket to the framing members with nails or screws.
WALL BRACKET
WALL STUD
8 FT. (2.4m)
FLUE
OUTLET
1 INCH MIN. (25.4mm)
Figure 14. Installing Support Brackets
4. Install Firestops
For Horizontal Runs - Firestops are REQUIRED on both sides of a combustible wall through which the vent passes.
NOTE: Model
To install firestops for horizontal runs that pass through either interior or exterior walls:
•Cut a
NOTE: The center of the hole is one (1) inch (25.4mm) above the center of the horizontal vent pipe.
•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.
12" |
(305mm) |
12" |
(305mm) |
1" (25.4 mm) |
VENT PIPE |
Figure 15. 12" x 12" Hole and Vent Pipe |
HEAT SHIELD
TRIM HEAT SHIELD IF TOO LONG, ADD TO SHIELD IF TOO SHORT
EXTERIOR
FIRESTOP
INTERIOR
FIRESTOP
Figure 16. Heat Shield, Interior & Exterior Firestops
18