Heatilator NBV3630I User manual

1Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/15
Model(s):
NBV3630I, NBV3933I,
NBV4236I, NBV4842I
B-Vent Gas Appliance
Owner’s Manual
Installation and Operation
DO NOT DISCARD THIS MANUAL
NOTICE
• Leave this manual with
party responsible for use
and operation.
• Important operating
and maintenance
instructions included.
• Read, understand and follow
these instructions for safe
installation and operation.
In the Commonwealth of Massachusetts installation must be
performed by a licensed plumber or gas fitter.
A CO detector shall be installed in the room where the appliance
in installed.
DO NOT
DO NOT
DISCARD
DISCARD
• DO NOT store or use gasoline or other flam-
mable vapors and liquids in the vicinity of this
or any other appliance.
• What 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 sup-
plier’s instructions.
- If you cannot reach your gas supplier, call
the fire department.
• Installation and service must be performed
by a qualified 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.
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.
Installation and service of this
appliance should be performed by
qualified personnel. Hearth & Home
Technologies recommends HHT
Factory Trained or NFI certified
professionals.


Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/152
Listing Label Information/Location
Model Name: ___________________________________________ Date purchased/installed:__________________
Serial Number:__________________________________________ Location on fireplace: _____________________
Dealership purchased from: _______________________________ Dealer Phone: __________________________
Notes: _______________________________________________________________________________________
_____________________________________________________________________________________________
A. Congratulations
Congratulations on selecting a Heatilator gas fireplace,
an elegant and clean alternative to wood burning fire-
places. The Heatilator gas fireplace you have selected is
designed to provide the utmost in safety, reliability, and
efficiency.
As the owner of a new fireplace, you’ll want to read and
carefully follow all of the instructions contained in this
owner’s manual. Pay special attention to all cautions and
warnings.
This owner’s manual should be retained for future reference.
We suggest that you keep it with your other important
documents and product manuals.
The information contained in this owner’s manual, unless
noted otherwise, applies to all models and gas control
systems.
Your new Heatilator gas fireplace will give you years of
durable use and trouble-free enjoyment. Welcome to the
Heatilator family of fireplace products!
We recommend that you record the following pertinent
information about your fireplace.
The model information regarding your specific fireplace can be found on
the rating plate usually located in the control area of the fireplace.
Homeowner Reference Information
Read this manual before installing or operating this appliance.
Please retain this owner’s manual for future reference.
NotNot forfor useuse withwith solidsolid fuel.fuel.
((NeNe doitdoit paspas entreentre utiliseutilise avecavec unun combustiblecombustible solide).solide).
ThisThis applianceappliance mustmust bebe installedinstalled inin accordanceaccordance withwith locallocal codes,codes, ifif any;any; ifif not,not, followfollow ANSIANSI Z223.1Z223.1
inin thethe USAUSA oror CAN/CGACAN/CGA B149B149 installationinstallation codes.codes. (Installer(Installer l’appareill’appareil selonselon lesles codescodes ouou reglementsreglements
locauxlocaux ou,ou, enen l’absencel’absence dede telstels reglements,reglements, selonselon lesles codescodes d’installationd’installation CAN/CGA-B149.)CAN/CGA-B149.)
TypeType ofof GasGas (Sorte(Sorte DeDe Gaz)Gaz)::
NNAATURALTURAL GASGAS
MADEMADE ININ USAUSA
MinimumMinimum PermissiblePermissible GasGas SupplySupply forfor PurposesPurposes ofof InputInput Adjustment.Adjustment.
ApprovedApproved MinimumMinimum (De(De Gaz)Gaz) AcceptableAcceptable 0.00.0 inin w.c.w.c. (Po.(Po. Col.Col. d’eau)d’eau)
MaximumMaximum PressurePressure (Pression)(Pression) 0.00.0 inin w.c.w.c. (Po.(Po. Col.Col. d’eau)d’eau)
MaximumMaximum ManifoldManifold PressurePressure (Pression)(Pression) 0.00.0 inin w.c.w.c. (Po.(Po. Col.Col. d’eau)d’eau)
MinimumMinimum ManifoldManifold PressurePressure (Pression)(Pression) 0.00.0 inin w.c.w.c. (Po.(Po. Col.Col. d’eau)d’eau)
Model:Model:
(Modele):(Modele):
SerialSerial
(Serie):(Serie):
ANSIANSI Z21XX-XXXXZ21XX-XXXX ·· CSACSA 2.XX-MXX2.XX-MXX
XXXXXXXXXXXXXXXX
ININ CANADACANADA
ALTITUDE:ALTITUDE: 0-00000-0000 FT.FT. 0000-0000FT.0000-0000FT.
MAX.MAX. INPUTINPUT BTUH:BTUH: 00,00000,000 00,00000,000
MIN.MIN. INPUTINPUT BTUH:BTUH: 00,00000,000 00,00000,000
ORIFICEORIFICE SIZE:SIZE: #XXXXX#XXXXX #XXXXX#XXXXX XXXXXXXXXXXXXXXX
TotalTotal ElectricalElectrical Requirements:Requirements: 000Vac,000Vac, 00Hz.,00Hz., lessless thanthan 0000 AmperesAmperes
Heatilator, a brand of Hearth & Home Technologies
7571 215th Street West, Lakeville, MN 55044
= Contains updated information.
Gas and Electric
Information
Serial Number
Type of Gas
Model Number

3Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/15
Safety Alert Key:
• DANGER! Indicates a hazardous situation which, if not avoided will result in death or serious injury.
• WARNING! Indicates a hazardous situation which, if not avoided could result in death or serious injury.
• CAUTION! Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
• NOTICE: Used to address practices not related to personal injury.
Table of Contents
A. Congratulations 2
B. Warranty 4
1 Listing and Code Approvals
A. Appliance Certification 6
B. Tempered Glass Specifications 6
C. BTU Specifications 6
D. High Altitude Installations 6
E. Non-Combustible Materials Specification 6
F. Combustible Materials Specification 6
G. Electrical Codes 6
User Guide
2 Operating Instructions
A. Gas Fireplace Safety 7
B. Your Fireplace 7
C. Fan Kit (optional) 8
D. Clear Space 8
E. Decorative Doors and Fronts 8
F. Fixed Glass Assembly 8
G. Remote Controls, Wall Controls and Wall Switches 8
H. Outside Air (optional) 8
I. Before Lighting Fireplace 8
J. Lighting Instructions (IPI) 9
K. After Fireplace is Lit 10
L. Flame Adjustment Control 10
M. Frequently Asked Questions 10
3 Maintenance and Service
A. Maintenance Tasks-Homeowner 11
B. Maintenance Tasks-Qualified Service Technician 12
Installer Guide
4 Getting Started
A. Typical Appliance System 13
B. Design and Installation Considerations 14
C. Tools and Supplies Needed 14
D. Inspect Appliance and Components 14
E. Negative Pressure 15
5 Framing and Clearances
A. Selecting Appliance Location 16
B. Constructing the Appliance Chase 17
C. Clearances 17
D. Mantel and Wall Projections 18
6 Termination Locations
A. Vent Termination Minimum Clearances 19
7 Vent Information and Diagrams
A. Vent Guidelines 20
B. Vent System Configuration 20
8 Vent Clearances and Framing
A. Pipe Clearances to Combustibles 21
B. Wall and Ceiling Penetration Framing 21
C. Vertical Penetration Framing 21
9 Appliance Preparation
A. Installing Outside Air Kit Damper Assembly 22
B. Gas and Electrical Connections 22
C. Securing and Leveling the Appliance 22
10 Installing Vent Pipe
A. Assembly of Vent Sections 23
B. Attaching Vent to Firebox 23
C. Securing Vent Sections 23
D. Install Attic Insulation Shield 23
11 Gas Information
A. Fuel Conversion 24
B. Gas Pressure 24
C. Gas Connection 24
D. High Altitude Installations 24
12 Electrical Information
A. Wiring Requirements 25
B. Intellifire Ignition System Wiring 25
C. Optional Accessories Requirements 25
D. Electrical Service and Repair 26
E. Junction Box Installation 27
F. Wall Switch Installation for Fan (Optional) 27
13 Finishing
A. Mantel and Wall Projections 28
B. Facing Material 29
14 Appliance Setup
A. Remove the Packaging 30
B. Remove Screen Package Assembly 30
C. Remove the Shipping Materials 30
D. Removing Fixed Glass Assembly 30
E. Clean the Appliance 30
F. Accessories 30
G. Place the Rockwool 31
H. Place the Lava Rock 31
I. Place the Vermiculite 31
J. Replacing Fixed Glass Assembly 31
K. Air Shutter Setting 31
L. Remove Screen Protector 32
M. Unpackage the Hood 32
N. Install Hood 32
O. Close the Screen Assembly 33
15 Troubleshooting
A. Intellifire Ignition System 34
16 Reference Materials
A. Appliance Dimension Diagram 36
B. Service Parts 37
C. Optional Components 43
D. Contact Information 44
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Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/154
B. Warranty
X Molded refractory panels
4021-645G 2/15 Page 1 of 2
Hearth & Home Technologies
LIMITED LIFETIME WARRANTY
Hearth & Home Technologies, on behalf of its hearth brands (“HHT”), extends the following warranty for HHT
gas, wood, pellet, coal and electric hearth appliances that are purchased from an HHT authorized dealer.
WARRANTY COVERAGE:
HHT warrants to the original owner of the HHT appliance at the site of installation, and to any transferee taking ownership
of the appliance at the site of installation within two years following the date of original purchase, that the HHT appliance
will be free from defects in materials and workmanship at the time of manufacture. After installation, if covered compo-
nents manufactured by HHT are found to be defective in materials or workmanship during the applicable warranty period,
HHT will, at its option, repair or replace the covered components. HHT, at its own discretion, may fully discharge all of its
obligations under such warranties by replacing the product itself or refunding the verified purchase price of the product
itself. The maximum amount recoverable under this warranty is limited to the purchase price of the product. This warranty
is subject to conditions, exclusions and limitations as described below.
WARRANTY PERIOD:
Warranty coverage begins on the date of original purchase. In the case of new home construction, warranty coverage
begins on the date of first occupancy of the dwelling or six months after the sale of the product by an independent,
authorized HHT dealer/ distributor, whichever occurs earlier. The warranty shall commence no later than 24 months
following the date of product shipment from HHT, regardless of the installation or occupancy date. The warranty period for
parts and labor for covered components is produced in the following table.
The term “Limited Lifetime” in the table below is defined as: 20 years from the beginning date of warranty coverage for
gas appliances, and 10 years from the beginning date of warranty coverage for wood, pellet, and coal appliances. These
time periods reflect the minimum expected useful lives of the designated components under normal operating conditions.
See conditions, exclusions, and limitations on next page.
Parts Labor Gas Wood Pellet
EPA
Wood
Coal Electric Venting
XXXXXXX
All parts and material except as
covered by Conditions,
Exclusions, and Limitations
listed
XXX
Igniters, electronic components,
and glass
XXXXX Factory-installedblowers
X Firepots and burnpots
5 years 1 year X X Castings and baffles
7 years 3 years X X X
Manifold tubes,
HHT chimney and termination
10
years
1 year X Burners, logs and refractory
Limited
Lifetime
3yearsXXXXX Fireboxandheatexchanger
XXXXXXX
All replacement parts
beyond warranty period
Warranty Period
HHT Manufactured Appliances and Venting
1 Year
Components Covered
3 years
2 years
90 Days
XIgnition Modules

5Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/15
B. Warranty (continued)
WARRANTY CONDITIONS:
• This warranty only covers HHT appliances that are purchased through an HHT authorized dealer or distributor. A list of
HHT authorized dealers is available on the HHT branded websites.
• This warranty is only valid while the HHT appliance remains at the site of original installation.
• This warranty is only valid in the country in which the HHT authorized dealer or distributor that sold the appliance
resides.
• Contact your installing dealer for warranty service. If the installing dealer is unable to provide necessary parts, contact
the nearest HHT authorized dealer or supplier. Additional service fees may apply if you are seeking warranty service
from a dealer other than the dealer from whom you originally purchased the product.
• Check with your dealer in advance for any costs to you when arranging a warranty call. Travel and shipping charges
for parts are not covered by this warranty.
This warranty is void if:
• The appliance has been over-fired or operated in atmospheres contaminated by chlorine, fluorine, or other damaging
chemicals. Over-firing can be identified by, but not limited to, warped plates or tubes, rust colored cast iron, bubbling,
cracking and discoloration of steel or enamel finishes.
• The appliance is subjected to prolonged periods of dampness or condensation.
• There is any damage to the appliance or other components due to water or weather damage which is the result of, but
not limited to, improper chimney or venting installation.
LIMITATIONS OF LIABILITY:
• The owner’s exclusive remedy and HHT’s sole obligation under this warranty, under any other warranty, express or
implied, or in contract, tort or otherwise, shall be limited to replacement, repair, or refund, as specified above. In no
event will HHT be liable for any incidental or consequential damages caused by defects in the appliance. Some states
do not allow exclusions or limitation of incidental or consequential damages, so these limitations may not apply to you.
This warranty gives you specific rights; you may also have other rights, which vary from state to state. EXCEPT TO
THE EXTENT PROVIDED BY LAW, HHT MAKES NO EXPRESS WARRANTIES OTHER THAN THE WARRANTY
SPECIFIED HEREIN. THE DURATION OF ANY IMPLIED WARRANTY IS LIMITED TO DURATION OF THE
EXPRESSED WARRANTY SPECIFIED ABOVE.
WARRANTY EXCLUSIONS:
This warranty does not cover the following:
• Changes in surface finishes as a result of normal use. As a heating appliance, some changes in color of interior and
exterior surface finishes may occur. This is not a flaw and is not covered under warranty.
• Damage to printed, plated, or enameled surfaces caused by fingerprints, accidents, misuse, scratches, melted items,
or other external sources and residues left on the plated surfaces from the use of abrasive cleaners or polishes.
• Repair or replacement of parts that are subject to normal wear and tear during the warranty period. These parts
include: paint, wood, pellet and coal gaskets, firebricks, grates, flame guides, batteries and the discoloration of glass.
• Minor expansion, contraction, or movement of certain parts causing noise. These conditions are normal and com-
plaints related to this noise are not covered by this warranty.
• Damages resulting from: (1) failure to install, operate, or maintain the appliance in accordance with the installation
instructions, operating instructions, and listing agent identification label furnished with the appliance; (2) failure to
install the appliance in accordance with local building codes; (3) shipping or improper handling; (4) improper opera-
tion, abuse, misuse, continued operation with damaged, corroded or failed components, accident, or improperly/
incorrectly performed repairs; (5) environmental conditions, inadequate ventilation, negative pressure, or drafting
caused by tightly sealed constructions, insufficient make-up air supply, or handling devices such as exhaust fans or
forced air furnaces or other such causes; (6) use of fuels other than those specified in the operating instructions; (7)
installation or use of components not supplied with the appliance or any other components not expressly authorized
and approved by HHT; (8) modification of the appliance not expressly authorized and approved by HHT in writing;
and/or (9) interruptions or fluctuations of electrical power supply to the appliance.
• Non-HHT venting components, hearth components or other accessories used in conjunction with the appliance.
• Any part of a pre-existing fireplace system in which an insert or a decorative gas appliance is installed.
• HHT’s obligation under this warranty does not extend to the appliance’s capability to heat the desired space. Informa-
tion is provided to assist the consumer and the dealer in selecting the proper appliance for the application. Consider-
ation must be given to appliance location and configuration, environmental conditions, insulation and air tightness of
the structure.
4021-645G 2/15 Page 2 of 2

Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/156
B. Tempered Glass Specifications
Hearth & Home Technologies appliances manufactured
with tempered glass may be installed in hazardous
locations such as bathtub enclosures as defined by the
Consumer Product Safety Commission (CPSC). The
tempered glass has been tested and certified to the
requirements of ANSI Z97.1 and CPSC 16 CFR 1202
(Safety Glazing Certification Council SGCC# 1595 and
1597. Architectural Testing, Inc. Reports 02-31919.01 and
02-31917.01).
This statement is in compliance with CPSC 16 CFR
Section 1201.5 “Certification and labeling requirements”
which refers to 15 U.S. Code (USC) 2063 stating “…Such
certificate shall accompany the product or shall otherwise
be furnished to any distributor or retailer to whom the
product is delivered.”
Some local building codes require the use of tempered
glass with permanent marking in such locations. Glass
meeting this requirement is available from the factory.
Please contact your dealer or distributor to order.
MODELS: NBV3630I, NBV3933I, NBV4236I, NBV4842I
LABORATORY: Underwriters Laboratories, Inc. (UL)
TYPE: Vented Gas Fireplace Heater
STANDARD: ANSI Z21.88-2014/CSA 2.33-2014
A. Appliance Certification
NOT INTENDED FOR USE AS A PRIMARY HEAT SOURCE.
This appliance is tested and approved as either supplemental
room heat or as a decorative appliance. It should not be fac-
tored as primary heat in residential heating calculations.
NOTICE: 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
1 Listing and Code Approvals
C. BTU Specifications
E. Non-Combustible Materials Specification
Material which will not ignite and burn. Such materials are
those consisting entirely of steel, iron, brick, tile, concrete,
slate, glass or plasters, or any combination thereof.
Materials that are reported as passing ASTM E 136, Stan-
dard Test Method for Behavior of Materials in a Vertical
Tube Furnace at 750 ºC shall be considered non-combus-
tible materials.
D. High Altitude Installations
NOTICE: If the heating value of the gas has been reduced,
these rules do not apply. Check with your local gas utility or
authorities having jurisdiction.
When installing above 2000 feet elevation:
• In the USA: Reduce input rate 4% for each 1000 feet
above 2000 feet.
• In CANADA: Reduce input rate 10% for elevations
between 2000 feet and 4500 feet. Above 4500 feet,
consult local gas utility.
Check with your local gas utility to determine proper
orifice size.
G. Electrical Codes
NOTICE: This appliance must be electrically wired
and grounded in accordance with local codes or, in the
absence of local codes, with National Electric Code
ANSI/NFPA 70-latest edition or the Canadian Electric
Code CSA C22.1.
• A 110-120 VAC circuit for this product must be protected
with ground-fault circuit-interrupter protection, in
compliance with the applicable electrical codes, when
it is installed in locations such as in bathrooms or near
sinks.
F. Combustible Materials Specification
Materials made of or surfaced with wood, compressed
paper, plant fibers, plastics, or other material that can ig-
nite and burn, whether flame proofed or not, or plastered
or unplastered shall be considered combustible materials.
Novus NBV NBV3630 NBV3933
IPI
Max/Min Input Rate (NG) 20,000/14,000 22,000/15,000
Orifice Size (NG) 0.083 0.089 (#43)
Max/Min Input Rate (LP) 20,000/15,000 22,000/15,000
Orifice Size (LP) 0.053 0.055 (#54)
Novus NBV NBV4236 NBV4842
IPI
Max/Min Input Rate (NG) 25,000/17,000 30,000/20,500
Orifice Size (NG) 0.093 (#42) 0.104 (#37)
Max/Min Input Rate (LP) 25,000/17,000 30,000/20,500
Orifice Size (LP) 0.058 0.063 (#52)

7Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/15
2
2 Operating Instructions
Figure 2.1 General Operating Parts
Mesh Door
Section 2.E.
Outside Air Kit
Section 2.H.
(must open mesh
door to access
handle)
Fixed Glass Assembly
(not shown)
Section 14.J.
Grate
(not shown) Mantel
Hearth
(not required)
Clear Space
Section 2.D.
B. Your Fireplace
WARNING! DO NOT operate fireplace before reading
and understanding operating instructions. Failure
to operate fireplace according to operating instructions
could cause fire or injury.
A. Gas Fireplace Safety
User Guide
Young children should be carefully supervised when they
are in the same room as the appliance. Toddlers, young
children and others may be susceptible to accidental
contact burns.
• A physical barrier is recommended if there are at risk
individuals in the house.
• To restrict access to a fireplace or stove, install an
adjustable safety gate to keep toddlers, young children
and other at risk individuals out of the room and away
from hot surfaces.
• Install a switch lock or a wall/remote control with child
protection lockout feature.
• Keep remote controls out of reach of children.
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. DO NOT operate the appliance with
the barrier removed. If the barrier becomes damaged,
the barrier shall be replaced with the manufacturer’s
barrier for this appliance.
Contact your dealer or Hearth & Home Technologies if the
barrier is not present or help is needed to properly install one.
• Never leave children alone near a hot fireplace, whether
operating or cooling down.
• Teach children to NEVER touch the fireplace.
• Consider not using the fireplace when children will be
present.
Contact your dealer for more information, or visit: www.
hpba.org/safety-information.
To prevent unintended operation when not using your
fireplace for an extended period of time (summer
months, vacation, trips, etc):
• Remove batteries from remote controls.
• Turn off wall controls.
• Unplug 3 volt adapter plug and remove batteries on IPI
models.
DANGER
HOT GLASS WILL
CAUSE BURNS.
DO NOT TOUCH GLASS
UNTIL COOLED.
NEVER ALLOW CHILDREN
TO TOUCH GLASS.
• Keep children away.
• CAREFULLY SUPERVISE children in same room
as fireplace.
• Alert children and adults to hazards of high
temperatures.
High temperatures may ignite clothing or other
flammable materials.
• Clothing, furniture, draperies, and other flammable
materials must not be placed on or near the
appliance.
WARNING! DO NOT operate fireplace before reading
and understanding operating instructions. Failure
to operate fireplace according to operating instructions
could cause fire or injury.

Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/158
CLEAR SPACE
3 FT. IN FRONT OF FIREPLACE
D. Clear Space
WARNING! DO NOT place combustible objects in
front of the fireplace or block louvers. High tempera-
tures may start a fire. See Figure 2.2.
Avoid placing candles and other heat-sensitive objects on
mantel or hearth. Heat may damage these objects.
Figure 2.2 Clear Space
H. Outside Air (optional)
The outside air kit supplies some fresh combustion air for
your fireplace. It may help reduce the effects of negative
air pressure. (See Section 4.E..)
• Refer to Figure 2.1 for location of control.
- Lift up on lever and pull forward to open outside air.
• Close the inlet to prevent cold drafts when the fireplace
is not being used.
CAUTION! Risk of Burns! The outside air control handle
is HOT when fireplace is in operation. Adjust BEFORE
lighting fire.
C. Fan Kit (optional)
• Refer to Figure 2.1 for location of control.
F. Fixed Glass Assembly
See Section 14.J.
E. Decorative Doors and Fronts
WARNING! Risk of Fire! Install ONLY doors or fronts
approved by Hearth & Home Technologies. Unapproved
doors or fronts may cause fireplace to overheat.
This fireplace has been supplied with an integral barrier
to prevent direct contact with the fixed glass panel. DO
NOT operate the fireplace with the barrier removed.
Contact your dealer or Hearth & Home Technologies if the
barrier is not present or help is needed to properly install
one.
For more information refer to the instructions supplied
with your decorative door or front.
G. Remote Controls, Wall Controls and Wall
Switches
Follow the instructions supplied with the control installed
to operate your fireplace:
I. Before Lighting Fireplace
Before operating this fireplace for the first time, have a
qualified service technician:
• Verify all shipping materials have been removed from
inside and/or underneath the firebox.
• Review proper placement of logs, ember material and/or
other decorative materials.
• Check the wiring.
• Check the air shutter adjustment.
• Ensure that there are no gas leaks.
• Ensure that the glass is sealed and in the proper position
and that the integral barrier is in place.
WARNING! RISK OF Fire/Asphyxiation! DO NOT operate
fireplace with fixed glass assembly removed.
For safety:
• Install a switch lock or a wall/remote control with child
protection lockout feature.
• Keep remote controls out of reach of children.
See your dealer if you have questions.

9Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/15
J. Lighting Instructions (IPI)
• For normal use, activate/deactivate your fireplace with the wall switch or remote control.
• The IPI system may be operated with two D-cell batteries. When using batteries, unplug the transformer. To prolong
battery life, remove them when using the transformer.
• If your fireplace must be deactivated for serviced or an extended period of time, follow the instructions below.
FOR YOUR SAFETY READ BEFORE LIGHTING
TO TURN OFF GAS TO APPLIANCE
1. This appliance is equipped with an ignition device which
automatically lights the burner. DO NOT try to light the burner by hand.
1. Equipped with wall switch: Turn ON/OFF switch to OFF.
Equipped with remote or wall control: Press OFF button.
Equipped with thermostat: Set temperature to lowest setting.
WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.
WARNING:
NOT FOR USE WITH SOLID FUEL
GAS
VALVE
For additional information on operating your
Hearth & Home Technologies fireplace, please refer to www.fireplaces.com.
A. This appliance is equipped with an intermittent pilot ignition (IPI) device which
automatically lights the burner. DO NOT try to light the burner by hand.
B. BEFORE LIGHTING, smell all around the appliance area for gas. Be sure to smell
next to the floor because some gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
•DO NOT try to light any appliance.
•DO NOT touch any electric switch; do not use any phone in your building.
DO NOT CONNECT LINE VOLTAGE (110/120 VAC OR 220/240 VAC) TO THE CON-
TROL VALVE.
Improper installation, adjustment, alteration, service or maintenance can cause
injury or property damage. Refer to the owner’s information manual provided with
this appliance. For assistance or additional information, consult a qualified installer,
service agency or the gas supplier.
This appliance needs fresh air for safe operation and must be installed so there are
provisions for adequate combustion and ventilation air.
If not installed, operated, and maintained in accordance with the manufacturer’s in-
structions, this product could expose you to substances in fuel or fuel combustion which
are known to the State of California to cause cancer, birth defects, or other reproductive
harm.
Keep burner and control compartment clean. See installation and operating instruc-
tions accompanying appliance.
Hot while in operation. DO NOT touch. Keep children, clothing, furniture, gasoline
and other liquids having flammable vapors away.
DO NOT operate the appliance with fixed glass assembly removed, cracked or
broken. Replacement of the fixed glass assembly should be done by a licensed or
qualified service person.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas sup-
plier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
C. Use only your hand to push in or turn the gas control knob. Never use tools. If
the knob will not push in or turn by hand, DO NOT try to repair it, call a qualified
service technician. Force or attempted repair may result in a fire or explosion.
D. DO NOT use this appliance if any part has been under water. Immediately call
a qualified service technician to inspect the appliance and to replace any part of
the control system and any gas control which has been under water.
For use with natural gas and propane. A conversion kit, as supplied by the manufac-
turer, shall be used to convert this appliance to the alternate fuel.
Also Certified for Installation in a Bedroom or a Bedsitting Room.
This appliance must be installed in accordance with local codes, if any; if none,
follow the National Fuel Gas Code, ANSIZ223.1/ NFPA 54, or the National Gas and
Propane Installation code, CSA B149.1.
LIGHTING INSTRUCTIONS (IPI)
2. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the
floor. If you smell gas, STOP! Follow “B” in the Safety Information located on the
top of this label. If you do not smell gas, go to next step.
3. To light the burner:
Equipped with wall switch: Turn ON/OFF switch to ON.
Equipped with remote or wall control: Press ON or FLAME button.
Equipped with thermostat: Set temperature to desired setting.
4. If the appliance does not light after three tries, call your service technician or gas
supplier.
2. Service technician should turn off electric power to the control when performing
service.
DANGER
HOT GLASS WILL CAUSE BURNS.
DO NOT TOUCH GLASS UNTIL COOLED.
NEVER ALLOW CHILDREN TO TOUCH GLASS.
CAUTION:
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.
593-913i

Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/1510
Initial Break-in Procedure
• The fireplace should be run three to four hours
continuously on high.
• Turn the fireplace off and allow it to completely cool.
• Remove fixed glass assembly. See Section 14.J.
• Clean fixed glass assembly. See Section 3.
• Replace the fixed glass assembly and run continuously
on high an additional 12 hours.
This cures the materials used to manufacture the fire-
place.
NOTICE! Open windows for air circulation during fireplace
break-in.
• Some people may be sensitive to smoke and
odors.
• Smoke detectors may activate.
K. After Fireplace is Lit
M. Frequently Asked Questions
ISSUE SOLUTIONS
Condensation on the glass This is a result of gas combustion and temperature variations. As the appliance warms, this
condensation will disappear.
Blue flames This is a result of normal operation and the flames will begin to yellow as the appliance is allowed
to burn for 20 to 40 minutes.
Odor from appliance When first operated, this appliance may release an odor for the first several hours. This is caused
by the curing of materials from manufacturing. Odor may also be released from finishing materials
and adhesives used near the appliance. These circumstances may require additional curing
related to the installation environment.
Film on the glass This is a normal result of the curing process of the paint and logs. Glass should be cleaned within
3 to 4 hours of initial burning. A non-abrasive cleaner such as gas appliance glass cleaner may be
necessary. See your dealer.
Metallic noise Noise is caused by metal expanding and contracting as it heats up and cools down, similar to the
sound produced by a furnace or heating duct. This noise does not affect the operation or longevity
of the appliance.
Is it normal to see the pilot
flame burn continually?
In an IntelliFire ignition system (IPI), the pilot flame should turn off when appliance is turned off.
Some optional control systems available with IPI models may allow pilot flame to remain lit. In a
standing pilot system the pilot will always stay on.
L. Flame Adjustment Control
Some appliances come equipped with a high/low flame
adjustment control.
• Open control access panel
• Compare your valve to Figures 2.4 & 2.5.
• Adjust the flame by turning knob as indicated in the photo
matching your valve.
HILO
Indicator
Indicator
HI LO
Figure 2.4 DEXEN Valve - IntelliFire Ignition System
Figure 2.5 SIT Valve - Standing Pilot Ignition System

11Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/15
Glass Cleaning
Frequency: Seasonally
By: Homeowner
Tools Needed: Protective gloves, glass cleaner, drop cloth
and a stable work surface.
CAUTION! Handle fixed glass assembly with care.
Glass is breakable.
• Avoid striking, scratching or slamming glass
• Avoid abrasive cleaners
•DO NOT clean glass while it is hot
•Prepare a work area large enough to accommodate fixed
glass assembly and door frame by placing a drop cloth
on a flat, stable surface.
Note: Fixed glass assembly and gasketing may have residue that
can stain carpeting or floor surfaces.
• Remove door or decorative front from fireplace and set
aside on work surface.
• See Section 14.J for instructions to remove fixed glass
assembly.
• Clean glass with a non-abrasive commercially available
cleaner.
- Light deposits: Use a soft cloth with soap and
water
- Heavy deposits: Use commercial fireplace glass
cleaner (consult with your dealer)
• Carefully set fixed glass assembly in place on fireplace.
Hold glass in place with one hand and secure glass
latches with the other hand.
• Reinstall door or decorative front.
3
3 Maintenance and Service
A. Maintenance Tasks-Homeowner
The following tasks may be performed annually by the
homeowner. If you are uncomfortable performing any of
the listed tasks, please call your dealer for a service ap-
pointment.
More frequent cleaning may be required due to lint from
carpeting or other factors. Control compartment, burner
and circulating air passageway of the fireplace must be
kept clean.
CAUTION! Risk of Burns! The fireplace should be
turned off and cooled before servicing.
When properly maintained, your fireplace will give you
many years of trouble-free service. We recommend an-
nual service by a qualified service technician.
Doors, Surrounds, Fronts
Frequency: Annually
By: Homeowner
Tools needed: Protective gloves, stable work surface
• Assess condition of screen and replace as necessary.
• Inspect for scratches, dents or other damage and repair
as necessary.
• Check that louvers are not blocked.
• Vacuum and dust surfaces.
Any safety screen or guard removed for servicing must be
replaced prior to operating the fireplace.
Installation and repair should be done by a qualified service
technician only. The fireplace should be inspected before use
and at least annually by a professional service person.
Remote Control
Frequency: Seasonally
By: Homeowner
Tools needed: Replacement batteries and remote control in-
structions.
• Locate remote control transmitter and receiver.
• Verify operation of remote. Refer to remote control
operation instructions for proper calibration and setup
procedure.
• Place batteries as needed in remote transmitters and
battery-powered receivers.
• Place remote control out of reach of children.
If not using your fireplace for an extended period of time
(summer months, vacations/trips, etc), to prevent unin-
tended operation:
• Remove batteries from remote controls.
• Unplug 3 volt adapter plug on IPI models.
Venting
Frequency: Seasonally
By: Homeowner
Tools needed: Protective gloves and safety glasses.
• Inspect venting and termination cap for blockage or
obstruction such plants, bird nests, leaves, snow, debris,
etc.
• Verify termination cap clearance to subsequent
construction (building additions, decks, fences, or
sheds). See Section 6.
• Inspect for corrosion or separation.
• Verify weather stripping, sealing and flashing remains
intact.
• Inspect draft shield to verify it is not damaged or missing.

Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/1512
Burner Ignition and Operation
Frequency: Annually
By: Qualified Service Technician
Tools needed: Protective gloves, vacuum cleaner, whisk
broom, flashlight, voltmeter, indexed drill bit set, and a manom-
eter.
• Verify burner is properly secured and aligned with
igniter.
• Clean off burner top, inspect for plugged ports, corrosion
or deterioration. Replace burner if necessary.
• Replace ember materials with new dime-size pieces.
DO NOT block ports or obstruct lighting paths. Refer to
Section 14.G. for proper rockwool placement.
• Verify batteries have been removed from battery back-
up IPI systems to prevent premature battery failure or
leaking.
• Check for smooth lighting and ignition carryover to all
ports. Verify that there is no ignition delay.
• Inspect for lifting or other flame problems.
• Verify air shutter setting is correct. See Section 14.K.
for required air shutter setting. Verify air shutter is clear
of dust and debris.
• Inspect orifice for soot, dirt and corrosion. Verify orifice
size is correct. See Service Parts List for proper orifice
sizing.
• Verify manifold and inlet pressures. Adjust regulator as
required.
• Inspect pilot flame pattern and strength. See Figure 3.1
for proper pilot flame pattern. Clean or replace orifice
spud as necessary.
• Inspect IPI flame sensing rod for soot, corrosion and
deterioration. Polish with fine steel wool or replace as
required.
• Verify that there is not a short in flame sense circuit by
checking continuity between pilot hood and flame sense
rod. Replace pilot as necessary. (IPI only)
Control Compartment and Firebox Top
Frequency: Annually
By: Qualified Service Technician
Tools needed: Protective gloves, vacuum cleaner, dust cloths
• Vacuum and wipe out dust, cobwebs, debris or pet hair.
Use caution when cleaning these areas. Screw tips that
have penetrated the sheet metal are sharp and should
be avoided.
• Remove all foreign objects.
• Verify unobstructed air circulation.
Firebox
Frequency: Annually
By: Qualified Service Technician
Tools needed: Protective gloves, sandpaper, steel wool,
cloths, mineral spirits, primer and touch-up paint.
• Inspect for paint condition, warped surfaces, corrosion
or perforation. Sand and repaint as necessary.
• Replace fireplace if firebox has been perforated.
Logs
Frequency: Annually
By: Qualified Service Technician
Tools needed: Protective gloves.
• Inspect for damaged or missing logs. Replace as
necessary.
• Verify correct log placement and no flame impingement
causing sooting. Correct as necessary.
B. Maintenance Tasks-Qualified Service
Technician
The following tasks must be performed by a qualified
service technician.
Gasket Seal and Glass Assembly Inspection
Frequency: Annually
By: Qualified Service Technician
Tools needed: Protective gloves, drop cloth and a stable work
surface.
• Inspect gasket seal and its condition.
• Inspect fixed glass assembly for scratches and nicks
that can lead to breakage when exposed to heat.
• Confirm there is no damage to glass or glass frame.
Replace as necessary.
• Verify that fixed glass assembly is properly retained and
attachment components are intact and not damaged.
Replace as necessary.
Figure 3.1 IPI Pilot Flame Patterns

13Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/15
A. Typical Appliance System
NOTICE: Illustrations and photos reflect typical installations and are for design purposes only. Illustrations/diagrams are not
drawn to scale. Actual product may vary from pictures in manual
Noncombustible roof
flashing maintains minimum
clearance around pipe
Ceiling Firestop
on floor of attic
Listed B-Vent Pipe
Framing/Header
(SECTION 5)
Gas Line
(SECTION 11)
Framing Headed off
in Ceiling Joists
(SECTION 8)
Mantel & Mantel Leg
(SECTION 13)
Surround
Hearth Extension
(not required)
Optional
Wall Switch
Vertical Termination Cap
Storm Collar
Attic insulation shield (not shown) must be used here to
keep insulation away from vent pipe if attic is insulated.
Vent pipe penetrates roof,
preferably without affecting
roof rafters
Figure 4.1 Typical System
4
4 Getting Started
Installer Guide

Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/1514
B. Design and Installation Considerations
Heatilator B-type vent gas appliances are designed to
operate with all exhaust gases expelled to the outside of
the building, and combustion air pulled from the room.
Installation MUST comply with local, regional, state and
national codes and regulations. Consult insurance carrier,
local building inspector, fire officials or authorities having
jurisdiction over restrictions, installation inspection and
permits.
Before installing, determine the following:
• Where the appliance is to be installed.
• The vent system configuration to be used.
• Gas supply piping.
• Electrical wiring requirements.
• Framing and finishing details.
• Whether optional accessories—devices such as a fan,
wall switch, or remote control—are desired.
D. Inspect Appliance and Components
The following B-vent components are needed for installa-
tion.
• Fireplace Box
• Pipe Components
• Firestops
• Attic Insulation Shield
• Elbows
• Strapping
• Roof Flashing or Chase Top
• Termination Cap
• Storm Collar
• Carefully remove the appliance and components from
the packaging.
• The vent system components and decorative doors and
fronts may be shipped in separate packages.
• If packaged separately, the log set and appliance grate
must be installed.
• Report to your dealer any parts damaged in shipment,
particularly the condition of the glass.
• Read all of the instructions before starting the installation.
Follow these instructions carefully during the installation
to ensure maximum safety and benefit.
WARNING! Risk of Fire or Explosion! Damaged parts
could impair safe operation. DO NOT install damaged,
incomplete or substitute components. Keep appliance dry.
C. Tools and Supplies Needed
Before beginning the installation be sure that the follow-
ing tools and building supplies are available.
Tape measure Framing material
Pliers Noncorrosive leak check solution
Hammer Phillips screwdriver
Gloves Framing square
Voltmeter Electric drill and bits (1/4 in.)
Plumb line Safety glasses
Level Reciprocating saw
Manometer Flat blade screwdriver
1/2 - 3/4 in. length, #6 or #8 Self-drilling screws
Caulking material (300ºF minimum continuous exposure
rating)
One 1/4 in. female connection (for optional fan).
WARNING! Risk of Fire, Explosion or Electric Shock!
DO NOT use this appliance if any part has been under wa-
ter. Call a qualified service technician to inspect the appli-
ance and to replace any part of the control system and/or
gas control which has been under water.
Improper installation, adjustment, alteration, service or
maintenance can cause injury or property damage. For
assistance or additional information, consult a qualified
service technician, service agency or your dealer.
Hearth & Home Technologies disclaims any responsibility for,
and the warranty will be voided by, the following actions:
• Installation and use of any damaged appliance or vent system
component.
• Modification of the appliance or vent system.
• Installation other than as instructed by Hearth & Home
Technologies.
• Improper positioning of the gas logs or the glass door.
• Installation and/or use of any component part not approved
by Hearth & Home Technologies.
Any such action may cause a fire hazard.

15Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/15
Recommended
Location
Marginal
Location
Location
Not
Recommended
Recommended
Location
Multi-level Roofs
Windward
Leeward
Location
Not
Recommended
Figure 4.2
E. Negative Pressure
WARNING! Asphyxiation Risk! Negative pressure can cause
spillage of combustion fumes and soot. Fireplace needs to draft
properly for safety.
Draft is the pressure difference needed to vent fireplaces
successfully. Considerations for successful draft include:
• Preventing negative pressure
• Location of fireplace and chimney
Negative pressure results from the imbalance of air
available for the fireplace to operate properly. Causes for
this imbalance include:
• Exhaust fans (kitchen, bath, etc.)
• Range hoods
• Combustion air requirements for furnaces, water heaters
and other combustion appliances
• Clothes dryers
• Location of return-air to furnace or air conditioning
• Imbalances of the HVAC air handling system
• Upper level air leaks (recessed lighting, attic hatch
opening, duct leaks)
To minimize the effects of negative air pressure, the fol-
lowing must be considered:
• Install the fresh air kit. Install the intake on the side of
the house towards prevailing winds during the heating
season.
• Ensure adequate outdoor air is supplied for combustion
appliances and exhaust equipment.
• Ensure furnace and air conditioning return vents are not
located in the immediate vicinity of the fireplace.
• Avoid installing the fireplace near doors, walkways or
small isolated spaces.
• Recessed lighting should be of “sealed can” design; attic
hatches weather stripped or sealed; and attic mounted
ductwork and air handler joints and seams taped or
sealed.
• Basement installations should be avoided due to stack
effect. Stack effect creates negative pressure in lower
levels. Hearth & Home Technologies recommends the
use of direct vent fireplaces in basements.
Location of the fireplace and chimney will affect perfor-
mance. As shown in Figure 4.2, the chimney should:
• Be installed through the warm space enclosed by the
building envelope. This helps to produce more draft,
especially during lighting and die-down of the fire.
• Penetrate the highest part of the roof. This minimizes
the effects of wind turbulence.
• Be located away from trees, adjacent structures, uneven
roof lines and other obstructions.
Offsets can restrict draft so their use should be mini-
mized. Consider the fireplace location relative to floor
and ceiling and attic joists.

Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/1516
In addition to these framing dimensions, also reference the
following sections:
• Clearances and Mantel Projections (Sections 5.C. and 5.D.)
• Vent Clearances and Framing (Section 6)
A
A
A
C
B
B
1/2 in. (13 mm) min.
appliance
to combustibles
Alcove
Installation
C
D
Drywall
48 in.
(1219 mm)
max.
ABCD
inches 36 33-1/2 19-5/8 37
mm 914 851 498 940
inches 39 35-1/2 19-5/8 40
mm 991 902 498 1016
inches 42 37-5/8 19-5/8 43
mm 1067 956 498 1092
inches 48 41-7/8 19-5/8 49
mm 1219 1064 498 1245
NBV4842I
Model
NBV3630I
NBV3933I
NBV4236I
* As B increases, E increases accordingly.
E*
E
8-1/2
216
241
270
324
9-1/2
10-5/8
12-3/4
5
5 Framing and Clearances
A. Selecting Appliance Location
When selecting a location for the appliance it is important
to consider the required clearances to walls (see Figure
5.1).
WARNING! Risk of Fire or Burns! Provide adequate
clearance around air openings and for service access. Due
to high temperatures, the appliance should be located out
of traffic and away from furniture and draperies.
NOTICE: Illustrations reflect typical installations and are
FOR DESIGN PURPOSES ONLY. Illustrations/diagrams
are not drawn to scale. Actual installation may vary due to
individual design preference.
Figure 5.1 Appliance Locations


17Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/15
Per
Manufacturer’s
Specifications
C
B
A
32-1/2 in.
(826 mm)
to ceiling
0 in.
0 in. TO LEVEL
OF STANDOFFS
1/2 in.
(13 mm)
Drywall
0 in.
1/2 in.
(13 mm)
Combustible Object
36 in.
(914 mm)
Combustible flooring may be installed
next to the front of the appliance.
A
Rough Opening
(Width)
B
Rough Opening
(Height)
C
Rough Opening
(Depth)
in. 36 34-7/8 19-5/8
mm 914 886 498
in. 39 34-7/8 19-5/8
mm 991 886 498
in. 42 34-7/8 19-5/8
mm 1067 886 498
in. 48 34-7/8 19-5/8
mm 1219 886 498
NBV4842I
Model
NBV3630I
NBV3933I
NBV4236I
B. Constructing the Appliance Chase
A chase is a vertical box-like structure built to enclose the
gas appliance and/or its vent system. In cooler climates
the vent should enclosed inside the chase.
NOTICE: Treatment of ceiling firestops and wall shield
firestops and construction of the chase may vary with the
type of building. These instructions are not substitutes for the
requirements of local building codes. Therefore, you MUST
check local building codes to determine the requirements
to these steps.
Chases should be constructed in the manner of all out-
side walls of the home to prevent cold air drafting prob-
lems. The chase should not break the outside building
envelope in any manner.
Walls, ceiling, base plate and cantilever floor of the chase
should be insulated. Vapor and air infiltration barriers
should be installed in the chase as per regional codes for
the rest of the home. Additionally, in regions where cold
air infiltration may be an issue, the inside surfaces may
be sheetrocked and taped for maximum air tightness. To
further prevent drafts, the wall shield and ceiling firestops
Figure 5.2 Clearances to Combustibles
C. Clearances
NOTICE: Install appliance on hard metal or wood surfaces
extending full width and depth. DO NOT install directly on
carpeting, vinyl, tile or any combustible material other than
wood.
WARNING! Risk of Fire! Maintain specified air space
clearances to appliance and vent pipe:
• Insulation and other materials must be secured to
prevent accidental contact.
• The chase must be properly blocked to prevent blown
insulation or other combustibles from entering and
making contact with fireplace or chimney.
• Failure to maintain airspace may cause overheating and
a fire.
should be caulked with caulk with a minimum of 300ºF con-
tinuous exposure rating to seal gaps. Gas line holes and
other openings should be caulked with caulk with a mini-
mum of 300ºF continuous exposure rating or stuffed with
unfaced insulation. If the appliance is being installed on a
cement surface, a layer of plywood may be placed under-
neath to prevent conducting cold up into the room.
Note: If the inside of the framed cavity is to be finished, the framing dimensions must include the finished surface. Example: If
drywall is to be attached to the rear wall, the depth must be measured from the drywall surface.

Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/1518
D. Mantel and Wall Projections
WARNING! Risk of Fire! Comply with all minimum clear-
ances as specified. Framing or finishing material closer
than the minimums listed must be constructed entirely
of noncombustible materials (i.e., steel studs, concrete
board, etc).
Figure 5.3 Minimum Vertical and Maximum Horizontal Dimensions of Combustibles
Mantels
Figure 5.4 Combustible Mantel Leg or Wall Projections
(Acceptable on both sides of opening)
Mantel Legs or Wall Projections
1 in. (25 mm) min.
to perpendicular wall
A
3-1/2 in. (89 mm) min.
from fireplace opening
to perpendicular wall
B
Mantel Leg or
Perpendicular Wall
Top of
Appliance
Drywall
A
B
Measured from top of hood (in inches)
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
5
5-1/2
6-1/4
7
7-3/4
8-1/2
9-1/4
10
10-3/4
11-1/2
12-1/4
13
13-3/4
14-1/2
15-1/4
16
30 in. minimum
to ceiling

19Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/15
A. Vent Termination Minimum Clearances
Gas, Wood or Fuel Oil
Termination Cap
B
Gas
Termination
Cap **
A *
*If using decorative cap cover(s), this distance may need to be
increased. Refer to the installation instructions supplied with the
decorative cap cover.
**
AB
6 in. (minimum) up to 20 in.
152 mm/508 mm
18 in. minimum
457 mm
20 in. and over 0 in. minimum
In a staggered installation with both gas and wood or fuel oil
terminations, the wood or fuel oil termination cap must be
higher than the gas termination cap.
Figure 6.1 Minimum Height From Roof To Lowest Discharge
Opening
6
6 Termination Locations
Fire Risk.
Maintain vent clearance to combustibles as
specified.
• DO NOT pack air space with insulation or other
materials.
Failure to keep insulation or other materials away
from vent pipe may cause overheating and fire.
WARNING
Figure 6.2 Multiple Termination Caps
12
X
8 ft
(2.44 m)
Lowest
Discharge
Opening
Termination
Cap
Roof Pitch
is X / 12
Vertical
wall
H (min.) - Minimum height
from roof to lowest
discharge opening.
Roof Pitch H (Min.) Ft. Roof Pitch H (Min.) Ft.
Flat to 6/12 1.0* Over 11/12 to 12/12 4.0
Over 6/12 to 7/12 1.25* Over 12/12 to 14/12 5.0
Over 7/12 to 8/12 1.5* Over 14/12 to 16/12 6.0
Over 8/12 to 9/12 2.0* Over 16/12 to 18/12 7.0
Over 9/12 to 10/12 2.5* Over 18/12 to 20/12 7.5
Over 10/12 to 11/12 3.25 Over 20/12 to 21/12 8.0
* 3 ft. minimum in snow regions
Storm Collar
Roof
Flashing

Heatilator • Novus B-Vent Series • 4055-188 • Rev. X • 9/1520
Minimum
clearances are
per vent
manufacturer's
specifications
Metal
plumber's strap
secured to
framing
Vent supports are per
vent manufacturer's
specifications
12 ft (3.66 m) min.
60 ft (18.29 m) max.
45°
Elbow
90°
Elbow
Offsets exceeding
45° adapt horizontal
limitations
Maximum
horizontal
30 ft (9.14 m)
Note: Maximum horizontal
distance is 50% of vertical
vent height.
Maximum horizontal run is 50% of
vertical. Horizontal run cannot be
more than 30 ft. (9.14 m).
Vent supports
are per vent
manufacturer’s
specifications.
Metal
Plumbers'
Strap
7
7 Vent Information and Diagrams
A. Vent Guidelines
WARNING! Fire Risk/Asphyxiation! This appliance re-
quires the specified pipe for operation. Incorrect pipe may
cause spillage, condensation and overheating.
These models require the following size B-vent double
wall vent pipe.
B. Vent System Configuration
CAUTION! Risk of Fire! ALL vent configuration specifi-
cations MUST be followed. This product is tested and listed
to these specifications. Appliance performance will suffer if
specifications are not followed.
Rise to Run Ratio = 2:1
Maximum Total Horizontal Run = 30 Feet
Minimum Total Vertical Rise =12 Feet
Maximum Total Vertical Rise = 60 Feet
Maximum Number of Elbows: Four 90º or Eight 45º
WARNING! Fire Risk/Explosion/Asphyxiation! DO NOT
connect this gas appliance to a chimney flue serving a
separate solid-fuel or gas burning appliance.
• Vent this appliance directly outside.
• Use separate vent system for this appliance.
May impair safe operation of this appliance or other
appliances connected to the flue.
WARNING! Risk of Fire or Explosion! Insulation and
other combustibles must not infringe on clearances.
• ALWAYS maintain specified clearances around venting
and firestop systems.
• Install firestops as specified.
Failure to keep insulation or other material away from vent
pipe may cause fire.
Figure 7.1 Vertical Termination Clearances
Figure 7.2 Maximum Horizontal Run
Figure 7.3 Maximum Horizontal Run Using 45° Elbows
• Follow pipe manufacturer’s installation guidelines when
installing the appliance.
Model Pipe Size
NBV3630I/NBV3933I 5 in. (127 mm)
NBV4236I/NBV4842I 5 in. (127 mm)