Rough Framing–Rough-in Wall Enclosure
SECTION 3
FRAMING
#SFD-36
R.6 February 2022
16
HUSSONG MFG. CO., INC.
KOZY HEAT FIREPLACES
3.5.2 Rough-in Vent Termination
3.5.3 Vent Termination Framing Requirements
This is a cold air transfer area. The fireplace enclosure must comply
with all clearances as outlined in this manual, and be constructed
in compliance with local building codes. Outside walls should be
insulated to prevent cold air from entering room.
Exterior vent termination location must be in compliance with section
6.2, MINIMUM VENT TERMINATION CLEARANCES
DO NOT RECESS THE VENT CAP INTO WALL OR SIDING.
IMPORTANT - METAL FAB VENT SYSTEM :
When installing Metal Fab
vent pipe, an adapter must be used. This will increase the minimum
height for the center of the vent pipe by 3-1/4” (83mm) when framing
the wall pass through for horizontal terminations.
3.5.3.1 Clearances
•
A minimum of 1” (25mm) clearance on all sides of the vertical
vent pipe must be maintained.
•
A minimum of 1” (25mm) clearance from the top surface on the
horizontal pipe must be maintained.
•
A minimum of 1” (25mm) clearance on the sides and bottom
surfaces on the horizontal pipe must be maintained.
3.5.3.2 Vertical Terminations
•
Follow vent pipe manufacturer’s installation instructions for
vertical terminations.
•
Attic insulation shields may be insulated using unfaced
insulation products listed as non-combustible per ASTM E 136.
3.5.3.3 Horizontal Terminations
IMPORTANT: Horizontal vent sections require 1/4” (6mm) rise for every
12” (305mm) of travel for natural draft applications.
Kozy Heat’s #800-WPT3, or wall thimble products that comply with
the required 1” (25mm) clearance to combustibles must be installed
for all horizontal vent (rigid or flexible) runs that pass through interior
or exterior walls. These wall thimble products may be insulated
using unfaced insulation products listed as noncombustible per
ASTM E 136.
Elbows listed with approved vent systems for this appliance vary in
vertical length. Please consult the vent manufacturer’s instructions
to determine the elbow dimension used for installation. Adjust the
wall pass-through rough opening dimensions to maintain clearance
requirements.
3.5.3.4 Wall Pass Through Framing
1. Measure from floor level of the fireplace to the center of where
the vent pipe will penetrate the wall. The dimensions in
are used with a Simpson DuraVent elbow.
2. Cut and frame an opening in the wall to allow the vent system to
run level through the wall pass-through.
3. Follow the vent pipe manufacturer’s installation instructions for
natural draft vent installation.
•
Rigid pipe dimensions in
reflect Simpson
Duravent 5” x 8” coaxial pipe. Other manufacturers product
dimensions may vary.
•
Flexible pipe framing dimensions in
reflect Kozy
Heat #800 Series Flexible Vent System.
