Rough Framing–Rough-in Vent Termination
SECTION 3
FRAMING
#CAR-39
R.11 February 2022
17
HUSSONG MFG. CO., INC.
KOZY HEAT FIREPLACES
3.6.2 Rough-in Vent Termination
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.
3.6.2.1 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.
3.6.2.2 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.
3.6.2.3 Horizontal Terminations
IMPORTANT: Horizontal vent sections require 1/4” (6mm) rise for every
12” (305mm) of travel for natural draft applications.
•
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.
•
Kozy Heat’s #800-WPT3, or wall thimble products that comply
with the required
1” (25mm) top clearance
to combustibles, must
be installed for all horizontal (rigid or flexible) vent 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.
#800-WPT3 covers wall thickness 4” (101mm) to 6-1/2” (165mm).
