kozy heat BIRCHWOOD-20 MILLIVOLT User manual

Hussong Mfg. Co., Inc. • BIR-20-MV Report No: 0216GH050S • Rev. 01, August 2015
HUSSONG MANUFACTURING CO., INC.
ͷDo not store or use gasoline or other
ammable vapors and liquids in the
vicinity of this or any other appliance.
ͷWHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do
not use any phone in your building.
• Leave the building immediately.
• Immediately call your gas supplier from
a neighbor’s phone. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier,
call the re department.
ͷInstallation and service must be performed
by a qualied installer, service agency or
the gas supplier.
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly
could result in serious injury, death, or
property damage.
This appliance may be installed in
an aftermarket, permanently located,
manufactured home (USA only) or mobile
home, where not prohibited by local codes.
This appliance is only for use with the type
of gas indicated on the rating plate. This
appliance is not convertible for use with
other gases, unless a certied kit is used.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
BIRCHWOOD-20 MILLIVOLT
Model #BIR-20-MV
Direct Vent Gas Stove
Tested &
Listed By
OMNI-Test Laboratories, Inc.
C US
Portland
Oregon USA
Installation and
Operation Manual
DANGER
HOT GLASS WILL
CAUSE BURNS
DO NOT TOUCH GLASS
UNTIL COOLED
NEVER ALLOW CHILDREN
TO TOUCH GLASS
A barrier designed to reduce the risk of burns
from the hot viewing glass is provided with this
appliance and shall be installed for the protection
of children and other at-risk individuals.
English and French installation manuals are
available through your local dealer. Visit our website
www.kozyheat.com or scan the QR code for our mobile app.
Les manuels d’installation en français et en anglais sont
disponibles chez votre détaillant local. Visitez www.kozyheat.
com ou scannez ce code QR pour notre application mobile.

HOMEOWNER REFERENCE 3
Read this manual before installation or operating this appliance.
Please retain this owner’s manual for future reference.
CONGRATULATIONS!
We welcome you as a new owner of a Kozy Heat gas replace. Kozy Heat products are designed with superior components
and materials, and assembled by trained craftsmen who take pride in their work. To ensure you receive a quality product, the
burner and valve assembly are 100 percent test-red, and the complete replace is thoroughly inspected before packaging. Our
commitment to quality and customer satisfaction has remained the same for over 30 years. We offer a complete line of gas and
wood replaces, along with stylish accessories to complement any decor. Adding a replace is one of the best ways to increase
the value of your home, and we are proud to offer a network of dealers throughout the country to help make your experience
everything you imagine. We pride ourselves in being dedicated not only to functionality and reliability, but also customer
safety. We offer our continual support and guidance to help you achieve the maximum benet and enjoyment from your Kozy
Heat gas replace.
Jim Hussong
President
Dudley Hussong
Board Chairman
Homeowner Reference Information
We recommend you record the following information:
Model Name: ___________________________________________
Serial Number: __________________________________________
Dealership Purchased from: _______________________________
Date purchased/installed: _________________________________
Location of fireplace: _____________________________________
Dealer phone: ___________________________________________
Notes: _____________________________________________________________________________________________________________
____________________________________________________________________________________________________________________
____________________________________________________________________________________________________________________
____________________________________________________________________________________________________________________
____________________________________________________________________________________________________________________

TABLE OF CONTENTS 5
TABLE OF CONTENTS
TABLE OF CONTENTS................................................................... 5
1.0 INTRODUCTION ...................................................................... 7
1.1 Appliance Certification..................................................................7
1.2 Requirements for the Commonwealth of Massachusetts ......7
2.0 SPECIFICATIONS.................................................................... 8
2.1 Appliance Components ................................................................8
2.2 Heating Specifications..................................................................8
2.3 Appliance Dimensions ..................................................................9
2.4 Safety Barrier Dimensions ...........................................................12
3.0 FRAMING ................................................................................. 13
3.1 Appliance Placement Considerations........................................13
3.2 Floor Support and Protection......................................................14
3.3 Vent Termination Framing.............................................................14
4.0 GAS LINE CONNECTION ....................................................... 15
4.1 Gas Conversion (sold separately) ..............................................15
4.2 Gas Line Installation......................................................................15
5.0 TERMINATION LOCATIONS ................................................... 16
5.1 Vertical Vent Cap Termination .....................................................16
5.2 Minimum Termination Clearances ..............................................17
6.0 VENTING .................................................................................. 18
6.1 Approved 4” x 6⅝” Vent Systems ..............................................18
6.2 Venting Requirements...................................................................18
6.3 Elbows..............................................................................................18
6.4 Vent Restriction .............................................................................19
6.5 Vertical Terminations.....................................................................20
6.6 Combination Venting .....................................................................21
7.0 FIREPLACE SETUP ................................................................. 22
7.1 Safety Barrier Installation .............................................................22
7.2 Glass Frame Assembly..................................................................22
7.3 #BW20-028MV Optional Fan Kit.................................................23
7.4 #BW20-500 Log Set Installation .................................................24
7.5 Control Board Removal and Installation ...................................25
8.0 THERMOSTAT, WALL SWITCH, REMOTE............................. 26
8.1 Rocker Switch Operation.............................................................26
8.2 Remote Control ..............................................................................26
8.3 Thermostat and Wall Switch ........................................................26
9.0 LIGHTING AND SHUTDOWN.................................................. 27
10.0 ADJUSTMENT ....................................................................... 28
10.1 Pressure Testing ..........................................................................28
10.2 Flame Apppearance Adjustment ..............................................29
11.0 TROUBLESHOOTING............................................................ 32
12.0 MAINTENANCE ..................................................................... 34
11.1 Burner and Pilot System ............................................................34
12.1 Fan (optional) ...............................................................................34
12.2 Vent System..................................................................................34
12.3 Glass Assembly ...........................................................................34
13.0 REPLACEMENT PARTS LIST............................................... 35
LIMITED WARRANTY ..................................................................... 37
LIFETIME WARRANTY ................................................................... 39

INTRODUCTION 7
1.0 INTRODUCTION
1.1 Appliance Certification
Laboratory: OMNI-Test Laboratories in Portland, Oregon
Standards:
ANSI Z21.88-2014/CSA 2.33-2014, Vented Gas Fireplace Heaters
CGA 2.17-M91 (R2009), Gas-Fired Appliances for Use at High
Altitudes
This installation must conform with local codes, or in the absence
of local codes, with the National Fuel Gas Code, ANSI Z223.1/
NFPA 54, or the Natural Gas and Propane Installation Code, CSA
B149.1.
1.2 Requirements for the
Commonwealth of Massachusetts
The following requirements reference various Massachusetts
and national codes not contained in this manual.
For all sidewall horizontally vented gas fueled equipment installed
in every dwelling, building or structure used in whole or in part
for residential purposes, including those owned or operated
by the Commonwealth and where the side wall exhaust vent
termination is less than (7) feet above finished grade in the area
of the venting, including but not limited to decks and porches, the
following requirements shall be satisfied:
1.2.1 Installation of Carbon
Monoxide Detectors
At time of installation of side wall horizontally vented gas fueled
equipment, the installing plumber or gas-fitter shall observe that
a hard wired carbon monoxide detector with an alarm and battery
back-up is installed on the floor level where the gas equipment is
to be installed. In addition, the installing plumber or gas-fitter shall
observe that a battery operated or hard wired carbon monoxide
detector is installed on each additional level of the dwelling,
building or structure served by the side wall horizontal vented gas
fueled equipment. It shall be the responsibility of the property
owner to secure the services of qualified licensed professionals
for the installation of hard wired carbon monoxide detectors.
In the event that the side wall horizontally vented gas fueled
equipment is installed in a crawl space or attic, the hard wired
carbon monoxide detector with alarm and battery back-up may
be installed on the next adjacent floor level. In the event that
the requirements of this subdivision can not be met at the time
of completion of installation, the owner shall have a period of
thirty (30) days to comply with the above requirements; provided,
however, that during said thirty (30) day period, a battery
operated carbon monoxide detector with an alarm shall be
installed.
1.2.2 Approved Carbon Monoxide Detectors
Each carbon monoxide detector as required in accordance with
the above provisions shall comply with NFPA 720 and be ANSI/
UL 2034 listed and IAS certified.
1.2.3 Signage
A metal or plastic identification plate shall be permanently
mounted to the exterior of the building at a minimum of eight (8)
feet above grade directly in line with the exhaust vent terminal
for the horizontally vented gas fueled heating appliance or
equipment. The sign shall read, in print no less the one-half inch
(½) in size, “GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL
OBSTRUCTIONS”.
1.2.4 Inspection
The state or local gas inspector of the side wall horizontally
vented gas fueled equipment shall not approve the installation
unless, upon inspection, the inspector observes carbon monoxide
detectors and signage installed in accordance with the provisions
of 248 CMR 5.08 (2) (a) 1 through 4.
1.2.5 Exemptions
The following equipment is exempt from 248 CMR 5.08 (2) (a) 1
through 4: The equipment listed in Chapter 10 entitled “Equipment
Not Required To Be Vented” in the most current edition of NFPA
54 as adopted by the Board; and Product Approved side wall
horizontally vented gas fueled equipment installed in a room or
structure separate from the dwelling, building or structure used in
whole or in part for residential purposes.
1.2.6 Manufacturer Requirements
1.2.6.1 Gas Equipment Venting System Provided
When the manufacturer of Product Approved side wall horizontally
vented gas equipment provides a venting system design or
venting system components with the equipment, the instructions
provided by the manufacturer for installation of the equipment and
the venting system shall include:
• Detailed instructions for the installation of the venting system
design or the venting system components; and
• A complete parts list for the venting system design or venting
system.
1.2.7 Gas Equipment Venting
System NOT Provided
When the manufacturer of Product Approved side wall horizontally
vented gas equipment does not provide the parts for venting the
flue gases, but identifies “special venting systems”, the following
requirements shall be satisfied by the manufacturer:
• The referenced “special venting systems” instructions shall
be included with the appliance or equipment installation
instructions and;
• The “special venting systems” shall be Product Approved by
the Board, and the instructions for that system shall include a
parts list and detailed installation instructions.
A copy of all installation instructions for all Product Approved
side wall horizontally vented gas fueled equipment, all venting
instructions, all parts lists for venting instructions, and/or all
venting design instructions shall remain with the appliance or
equipment at the completion of the installation.

8SPECIFICATIONS
2.0 SPECIFICATIONS
2.1 Appliance Components
Part Number Description
BW20MV-770 Control Board Assembly
700-203 Manual Gas Shut-off Valve
BW20-500 Log Package
BW20-057T Glass Frame Assembly
900-085 4 in (102 mm) Restrictor Plate
2.1.1 Additional Components Required
Refer to Section 6.0 Venting on page 18 for approved vent
systems.
2.2 Heating Specifications
Natural Gas LP Gas
Maximum
Input Rating
32,500 BTU/h
(9.5 kW)
32,500 BTU/h
(9.5 kW)
Minimum
Input Rating
16,000 BTU/h
(4.7 kW)
16,000 BTU/h
(4.7 kW)
Manifold Pressure
(High)
3.5” WC
(.87 kPa)
10” WC
(2.49 kPa)
Manifold Pressure
(Low)
1.6” WC
(.40 kPa)
6.4” WC
(1.59 kPa)
Orifice Size (DMS) FRONT: .0625
BACK: 44
FRONT: 61
BACK: 54
2.2.1 Altitude Adjustment
This appliance may be installed at higher altitudes. Please refer
to National Fuel Gas Code ANSI Z223.1/NFPA 54, CSA-B149.1
Natural Gas and Propane Installation Code, local authorities,
or codes having jurisdiction in you area regarding derate
guidelines.
2.2.1.1 US Installations
Refer to the American Gas Association guidelines for the gas
designed appliances derating method. For elevations above 2,000
ft (610 m), input ratings are to be reduced by 4% for each 1,000 ft
(305 m) above sea level.
2.2.1.2 Canadian Installations
When the appliance is installed at elevations above 4,500 ft (1,372
m), the certified high altitude rating shall be reduced at the rate of
4% for each additional 1,000 ft (305 m).

SPECIFICATIONS 9
2.3 Appliance Dimensions
23⁄”
(605mm)
6⁄”
(176mm)
20⁄”
(510mm)
14⁄”
(359mm)
25⁄”
(658mm)
30¾”
(781mm)
7¼”
(185mm)
15¾”
(400mm)
17⁄”
(452mm)
7¼”
(185mm)
27¾”
(658mm)
LEFT SIDE FRONT VIEW RIGHT SIDE
TOP VIEW
Figure 2.1, Appliance Dimensions (shown with traditional legs)

10 SPECIFICATIONS
23⁄”
(605mm)
20⁄”
(510mm)
14⁄”
(359mm)
7¼”
(185mm)
35⁄”
(913mm)
13¾”
(349mm)
17¾”
(451mm)
18⁄”
(461mm)
27¾”
(704mm)
12⁄”
(308mm)
17⁄”
(452mm)
7¼”
(185mm)
27¾”
(658mm)
TOP VIEW
LEFT SIDE FRONT VIEW RIGHT SIDE
Figure 2.2, Appliance Dimensions (shown with traditional base)

SPECIFICATIONS 11
17⁄”
(452mm)
7¼”
(185mm)
27¾”
(658mm)
20⁄”
(510mm) 7¼”
(184mm)
23⁄”
(605mm)
8⁄”
(219mm)
12⁄”
(308mm)
14⁄”
(359mm)
15⁄”
(389mm)
TOP VIEW
LEFT SIDE FRONT VIEW RIGHT SIDE
Figure 2.3, Appliance Dimensions (shown with contemporary base)

12 SPECIFICATIONS
2.4 Safety Barrier Dimensions
WARNING: A barrier designed to reduce the risk of burns from
the hot viewing glass is provided with this appliance and shall
be installed for the protection of children and other at-risk
individuals.
If the barrier becomes damaged, the barrier shall be replaced
with Hussong Mfg.’s barriers for this appliance. Only doors
certified with the appliance shall be used.
Please refer to Section 7.1 Safety Barrier Installation on page
22 for installation instructions.
25¾”
(653mm)
21⁄”
(536mm)
25¾”
(653mm)
21⁄”
(536mm)
25¾”
(653mm)
21⁄”
(536mm)
BW20-FRSF BW20-PSF BW20A-MSF

FRAMING 13
3.0 FRAMING
3.1 Appliance Placement
Considerations
WARNING: Due to high temperatures, the appliance should be
located out of traffic and away from furniture and draperies.
FIRE HAZARD: Do NOT install this appliance directly on
carpeting, vinyl, or any other combustible material other than
wood.
• This appliance must be installed on a level surface capable
of supporting the fireplace and venting. If possible, place the
fireplace in a position where the vent terminates between two
studs, eliminating the need for any additional framing.
• This fireplace may be installed in a bedroom.
• Please be aware of the large amount of heat this fireplace will
produce when determining a location.
1”
(25mm)
1”
(25mm)
157⁄8”
(404mm)
14⁄”
(378mm)
1”
(25mm)
5”
(127mm)
Table 3.1, Minimum Clearances to Combustible Material
From appliance top corner to side wall 1 in 25 mm
From appliance top corner to back wall 5 in 127 mm
From appliance top to ceiling 35-3/4 in 908 mm
From top of horizontal pipe surface to ceiling 3-1/8 in 80 mm
Figure 3.1, Typical Install Options
35¾”
(908mm)
3⁄”
(80mm)
65⁄”
(1654mm)
PEDESTAL BASE
35¾”
(908mm)
3⁄”
(80mm)
65⁄”
(1654mm)
CONTEMPORARY BASE
35¾”
(908mm)
3⁄”
(80mm)
60”
(1524mm)
TRADITIONAL LEGS

14 FRAMING
3.2 Floor Support and Protection
• The fireplace must be placed directly on a wood or non-
combustible surface (not linoleum or carpet) extending the
entire depth and width of the fireplace
• If this appliance is to be installed directly on carpeting, tile,
or other combustible material other than wood flooring,
this appliance shall be installed on a metal or wood panel
extending the full width and depth of the appliance.
• If the appliance is to be installed above floor level, a
solid, continuous platform must be constructed below the
appliance.
3.3 Vent Termination Framing
IMPORTANT: Vent cap location must be in compliance with
Section 5.2 Minimum Termination Clearances on page 17.
WARNING: DO NOT RECESS THE VENT CAP INTO WALL OR
SIDING.
3.3.1 Vertical Terminations
CAUTION: Cold air transfer area. The surrounding 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.
3.3.2 Horizontal Terminations
IMPORTANT: Horizontal vent sections require ¼ in (6 mm) rise
for every 12 in (305 mm) of travel.
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 as necessary to maintain clearance requirements.
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. A minimum of 1 in
(25 mm) clearance 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.

GAS LINE CONNECTION 15
4.0 GAS LINE CONNECTION
4.1 Gas Conversion (sold separately)
ATTENTION: The conversion shall be carried out in accordance
with the requirements of the provincial authorities having
jurisdiction and in accordance with the requirements of the
ANSI Z223.1 installation code.
This fireplace is manufactured for use with natural gas. Follow the
instructions included with the conversion kit if converting to LP
gas.
4.2 Gas Line Installation
CAUTION: Installation of the gas line must only be done by
a qualified person in accordance with local building codes, if
any. If not, follow ANSI 223.1. Commonwealth of Massachusetts
installations must be done by a licensed plumber or gas fitter.
NOTE: The appliance and its individual shutoff valve must be
disconnected from the gas supply piping system during any
pressure testing of that system at pressures in excess of ½
psi (3.5 kPa). For test pressures equal to or less than ½ psi
(3.5 kPa), the appliance must be isolated from the gas supply
piping system by closing its individual manual shut-off valve.
• A listed (and Commonwealth of Massachusetts approved) ½
in. (13 mm) tee handle manual shut-off valve and flexible gas
connector are to be connected to the ½ in. (13 mm) control
valve inlet. If substituting for these components, please
consult local codes for compliance.
• This fireplace is equipped with a ⅜” (10 mm) x 36” (914 mm)
long flexible gas connector and manual shut-off valve.
• The gas line should be run to the point of connection where
the shut-off valve and flexible gas line will connect.
• Do not run gas line in a manner that would obstruct fan
operation.
• For high altitude installations, consult the local gas distributor
or the authority having jurisdiction for proper rating methods.
Table 4.1, Inlet Gas Supply Pressures
Fuel Minimum Pressure Maximum Pressure
Natural Gas 5” WC (1.25 kPa) 10.5” WC (2.62 kPa)
LP Gas 11” WC (2.74 kPa) 13” WC (3.24 kPa)

16 TERMINATION LOCATIONS
5.0 TERMINATION LOCATIONS
5.1 Vertical Vent Cap Termination
WARNING: This gas appliance must not be connected to a
chimney serving any other appliance.
Minimum height (H) from roof
Roof Pitch Feet Meters
Flat to 6/12 1.0 0.30
Over 6/12 to 7/12 1.25 0.38
Over 7/12 to 8/12 1.5 0.46
Over 8/12 to 9/12 2.0 0.61
Over 9/12 to 10/12 2.5 0.76
Over 10/12 to 11/12 3.25 0.99
Over 11/12 to 12/12 4.0 1.22
Over 12/12 to 14/12 5.0 1.52
Over 14/12 to 16/12 6.0 1.83
Over 16/12 to 18/12 7.0 2.13
Over 18/12 to 20/12 7.5 2.27
Over 20/12 to 21/12 8.0 2.44
12
x
ROOF PITCH = x/12
HH
LOWEST
DISCHARGE
OPENING
APPROVED CAP
APPROVED
VENT PIPE
H - MINIMUM HEIGHT FROM ROOF TO
LOWEST DISCHARGE OPENING
MINIMUM
*12” (.30 m)
*If vent is closer than 12 in (.30 m), it must terminate at least 2
ft (.61 m) higher than any portion of a building within 10 ft (3.05
m) of the vent.
Figure 5.1, Vertical Vent Cap Clearance

TERMINATION LOCATIONS 17
5.2 Minimum Termination Clearances
HOT
HOT
HOT
HOT
HOT
AREA WHERE TERMINAL
IS NOT PERMITTED
AA
BB
C
D
E
F
G
H
J
KL
M
N
O
P
BB
I
Canadian installations US installations
AClearance above grade, veranda, porch, deck, or balcony 12 in (30 cm) 12 in (30 cm)
BClearance to window or door that may be opened 12 in (30 cm) 9 in (23 cm)
CClearance to permanently closed window (recommended to prevent condensation
on window)
12 in (30 cm)* 12 in (30 cm)*
DVertical clearance to ventilated soffit located above the terminal within a horizontal
distance of 2 feet (61 cm) from the cent line of the terminal
24 in (61 cm)* 24 in (61 cm)*
EClearance to unventilated soffit 12 in (30 cm)* 12 in (30 cm)*
FClearance to outside corner 0 in (0 cm)* 0 in (0 cm)*
GClearance to inside corner** 12 in (30 cm)* 12 in (30 cm)
HClearance to each side of center line extended above meter/regulator assembly 3 ft (91 cm) within a height
15 ft (4.5 m) above the meter/
regulator assembly
*
IClearance to service regulator vent outlet 3 ft (91 cm) *
JClearance to non mechanical air supply inlet to building or the combustion air inlet
to any other appliance
12 in (30 cm) 9 in (23 cm)
KClearance to mechanical air supply inlet 6 ft (1.83 m) 3 ft (91 cm) above if within
10 ft (3 m) horizontally
Massachusetts: 10 ft (3 m)
LClearance above paved sidewalk or paved driveway located on public property 7 ft (2.13 m)† *
MClearance under veranda, porch deck, or balcony 12 in (30 cm)‡ 12 in (30 cm)
NClearance between two horizontal terminations 12 in (30 cm) 12 in (30 cm)
OClearance between two vertical terminations (may be same height) 12 in (30 cm) 12 in (30 cm)
PAbove furnace exhaust or inlet 12 in (30 cm) 12 in (30 cm)
* Clearance in accordance with local installation codes and the requirements of the gas supplier.
† A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
VINYL SOFFIT, VINYL CEILING, AND VINYL OVERHANG DISCLAIMER: Clearances to heat resistant material (i.e. wood, metal). This does not
include vinyl. Hussong Manufacturing Co., Inc. will not be held responsible for heat damage caused from terminating under vinyl overhangs,
vinyl ceilings, or vinyl ventilated/unventilated soffits.
Figure 5.2, Vent Cap Locations

18 VENTING
6.0 VENTING
6.1 Approved 4” x 6⅝” Vent Systems
Vent Manufacturer Direct Vent System Termination
American Metal
Products
Ameri-Vent Horizontal & Vertical
BDM Pro-Form Horizontal & Vertical
ICC EXCELDirect
EXCEPT CAP TM-4VT
Horizontal & Vertical
Metal Fab Direct Vent Chimney Horizontal & Vertical
Olympia Chimney
Supply, Inc.
Ventis Direct Vent Horizontal & Vertical
Security Direct Vent Chimney Vertical only
Selkirk Direct Temp Horizontal & Vertical
Simpson
DuraVent
DV-GS Horizontal & Vertical
6.2 Venting Requirements
Consult the local and national installation codes to assure
adequate combustion and ventilation air is available. Venting
requirements apply to both natural gas and LP gas.
• Flame height and appearance will vary depending upon
venting configuration and the type of fuel used.
• 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.
• Provide a means for visually checking the vent connection to
the appliance after the fireplace is installed.
• This fireplace may be vented through a 6 in (152 mm)
or larger Class-A metal chimney, or a co-axial masonry
chimney if an approved adapter is used. Refer to the vent
manufacturer’s installation instructions.
6.2.1 Vent Section Clearances
Table 6.1, Vertical Pipe Section Clearances
Surface Sides
Approved Venting 1 in (25 mm)
Table 6.2, Horizontal Pipe Section Clearances
Surface Top Bottom Sides
Approved Venting 1 (25 mm) 1 in (25 mm) 1 in (25 mm)
6.3 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.

VENTING 19
Figure 6.1, Restrictor Assembly and Installation
RESTRICTOR PLATE REMOVE KNOCKOUT TO
CREATE LESS RESTRICTION
BEND TABS TO APPROX.
80° ANGLES AND INSERT
INTO EXAHUST PIPE
6.4 Vent Restriction
Vertical terminations may display an active, compact flame. To
achieve desirable flame appearance, the vent exhaust may be
restricted by the restrictor plate (included in components packet)
and/or by adjusting the built-in restrictor located in the fireplace
baffle. This fireplace is shipped with the baffle restrictor set in
position for natural gas minimum horizontal venting.
Hussong Manufacturing has outlined vent restriction
recommendations with for vent configurations listed in the
following pages. Follow the instructions below and vent restriction
recommendations on the following pages for optimal flame
appearance.
6.4.1 Restrictor Plate Assembly
and Installation
A restrictor plate (included in components packet) may be
installed before vent installation to achieve desired flame
appearance. Hussong Manufacturing has outlined restrictor plate
recommendations for vent configurations listed on the following
pages. For vent restriction plate recommendations after vent
installation, see Section 10.2.2 Vent Restriction on page 35 .
6.4.2 Baffle Restriction
This fireplace is shipped with the baffle restrictor set in
position for natural gas minimum horizontal venting. Hussong
Manufacturing has outlined baffle restrictor adjustments for vent
configurations listed on the following pages. To adjust the baffle
restrictor,
1. Remove the safety barrier and glass frame assembly.
2. Remove and save (1) screw to adjust the baffle restrictor to
achieve desired flame appearance.
3. Secure the baffle restrictor with (1) screw previously
removed.
4. Reinstall all components previously removed.
Figure 6.2, Baffle Restrictor Adjustments

20 VENTING
6.5 Vertical Terminations
NOTE: Attic insulation shields may be insulated using unfaced
insulation products listed as non-combustible per ASTM E 136.
Table 6.3, NG & LPG - Minimum / Maximum Vertical Terminations
Minimum Vertical Length Maximum Vertical Length
3 ft 914 mm 50 ft 15.2 m
Table 6.4, Recommended Restriction for Vertical Terminations
Gas Type Vent
Configuration
Baffle Position Restrictor
NG Minimum vertical Setting (5) Install restrictor -
Remove knockout
NG Maximum vertical Setting (5) Install restrictor -
Remove knockout
LP Minimum vertical Setting (5) Install restrictor -
Remove knockout
LP Maximum vertical Setting (5) Install restrictor -
Remove knockout
36”
(914mm)
50’
(15.24m)
VERTICAL
TERMINATION CAP