Rough Framing
SECTION 3
FRAMING
#BHM-38 & #BHM-38-BW
R.1 September 2021
17
HUSSONG MFG. CO., INC.
KOZY HEAT FIREPLACES
3.5.2.3 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.
3.5.2.3 Horizontal Terminations
WARNING: Do not recess the vent cap into wall or siding.
IMPORTANT: Horizontal vent sections require 1/4” (6mm) rise for every
12” (305mm) of travel for natural draft applications.
Wall thimble products that comply with the required
1” (25mm) top
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.
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.
3.5.2.4 Wall Pass Through Framing Instructions
Follow
FIGURE 3.7
below for minimum rough-in dimensions.
1. Measure from floor level of the fireplace to the center of where
the vent pipe will penetrate the wall. The dimension in
FIGURE
3.7
is 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.
•
Vent pipe dimensions are tested with listed Simpson Duravent
pipe. Other manufacturers product dimensions may vary.
22”
(558mm)
67
¾
”
(1721mm)
Natural gas and propane
Natural draft minimum horizontal termination
FIGURE 3.7
Rough-in Dimensions for Minimum Horizontal Vent Termination
ALL DESIGN OPTIONS INSTALLATION
Nominal 2”x 4” framing used in enclosure framing
