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VENTING
SP-41-L MANUAL REV#2 OCT 2017
Hussong Mfg. Co., Inc. • Kozy Heat Fireplaces
7.0 VENTING
7.1 Approved Vent Systems
This appliance is equipped for use with a 4” (102mm) exhaust
by 6-5/8” (168mm) air intake co-axial vent pipe system. This
appliance is approved for use with Kozy Heat 4” (102mm) x 7”
(177mm) #700 Series Flexible Direct Vent System (horizontal
terminations only). Refer to Section 7.6 on page 25 for venting
components and installation instructions.
Other approved vent manufacturers (horizontal and vertical
terminations): American Metal Products (Ameri-Vent), BDM, ICC,
Metal Fab, Olympia Chimney Supply, Inc., Security, Selkirk, and
Simpson DuraVent. Refer to the vent manufacturer’s installation
manual for complete installation instructions. Vent installation
must conform with venting requirements and restrictions as
outlined in this manual.
This appliance can be adapted to use 3” x 3” flexible co-linear
vent pipes when used in combination with an existing minimum 6”
x 8” ID masonry or 7” ID class A metal chimney. Refer to the vent
manufacturer’s instructions.
7.2 Venting Requirements
NOTE: Consult the local and national installation codes to
assure adequate combustion and ventilation air is available.
Venting requirements apply to both natural gas and propane.
IMPORTANT: This fireplace horizontal vent installation requires
wall pass-through products to be fully lined with unfaced
insulation products listed as noncombustible per ASTM E 136.
Failure to line wall pass through products for all horizontal vent
runs may cause overheating and fire.
• Flame height and appearance will vary depending upon
venting configuration and the type of fuel used.
• Provide a means for visually checking the vent connection to
the appliance after the fireplace is installed.
• 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
noncombustible per ASTM E 136.
• Wall pass-through vent products that comply with the
required insulation must be installed for all horizontal vent
runs that pass through interior or exterior walls. A minimum
of 1 in (25 mm) clearance on all sides of the horizontal vent
pipe at the insulated wall pass-through must be maintained.
7.3 Use of Elbows
• MAXIMUM NUMBER OF 90° ELBOWS: 5
• For each additional 90° elbow used after the first elbow, 3 ft
(91.4 cm) must be subtracted from maximum venting allowed.
• For each 45° elbow used, 1½ ft (457 mm) must be
subtracted from maximum venting allowed.
• (2) 45° degree elbows may be used in place of (1) 90°
elbow.
Figure 7.1, Restrictor Assembly and Installation
7.4 Vent Restriction
Burner flame appearance and characteristics are affected by
altitude, fuel quality, venting configuration, and other factors.
To achieve desirable flame appearance, the vent exhaust may
be restricted by the restrictor plate (included in components
packet). Follow Figure 7.1 for restrictor plate installation before
attaching venting. For vent restriction plate recommendations and
adjustments, see 11.2.2 Vent Restriction (after installation) on
page 40.
SLIDE RESTRICTOR PLATE INTO EXHAUST PIPE ON TOP OF FIREPLACE
WITH THE TABS POINTING TOWARDS YOU PRIOR TO ATTACHING VENTING
RESTRICTOR PLATE
REMOVE CIRCLE TO
CREATE LESS RESTRICTION
BEND TABS TO APPROX. 80° ANGLES TO CREATE
TENSION TO HOLD ITSELF IN PLACE WHEN INSTALLED
