16 FRAMING
Hussong Mfg. Co., Inc. • Kozy Heat Fireplaces
#CLW-72 R.1 April 2019
3.8 Vent Termination Framing
IMPORTANT: Vent cap location must be in compliance with Section 6.2
Minimum Termination Clearances on page 35.
WARNING: DO NOT RECESS THE VENT CAP INTO WALL OR SIDING.
3.8.1 Vertical Terminations
CAUTION: Cold air transfer area. The surround fireplace chase
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.
•
Follow vent pipe manufacturer’s installation instructions for
vertical terminations.
•
A minimum of 1 in (25 mm) clearance on all sides of the vertical
vent pipe must be maintained.
•
Attic insulation shields may be insulated using unfaced
insulation products listed as non-combustible per ASTM E 136.
3.8.2 Horizontal Terminations
IMPORTANT: Horizontal vent sections require 1/4 in (6 mm) rise for
every 12 in (305 mm) of travel for natural draft applications.
NOTE: 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.
Wall thimble products that comply with the required 1 in (25 mm)
clearance to combustibles, must be installed for all horizontal 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.
1. Measure from floor level of the fireplace to the center of where
the vent pipe will penetrate the wall.
2. Cut and frame an opening in the wall to allow the vent system
to run level through the wall pass-through. This wall pass-
through may be fully lined with insulation products listed as
noncombustible per ASTM E 136. A minimum 1 in (25 mm) on all
sides of the horizontal vent pipe at the wall pass-through must
be maintained.
3. Follow the vent pipe manufacturer’s installation instructions for
vent installation.
Figure 3.7, Vent Termination Locations
81
½
”
(2070mm)
22”
(559mm)
69
½
”
(1765mm)
22”
(559mm)
NATURAL GAS RIGID PIPE
MINIMUM HORIZONTAL TERMINATION
PROPANE RIGID PIPE
MINIMUM HORIZONTAL TERMINATION
