Heat & Glo COSMO-I30-C User manual

1Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/15
Models:
COSMO-I30-C
COSMO-I35-C
Owner’s Manual
Installation and Operation
DO NOT DISCARD THIS MANUAL
NOTICE
• Leave this manual with
party responsible for use
and operation.
DO NOT
DISCARD
• 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.
This appliance may be installed as an OEM
installation in manufactured home (USA
only) or mobile home and must be installed
in accordance with the manufacturer’s
instructions and the Manufactured Home
Construction and Safety Standard, Title 24
CFR, Part 3280 in the United States, or the
Standard for Installation in Mobile Homes,
CAN/CSA Z240 MH Series, in Canada.
This appliance is only for use with the type(s)
of gas indicated on the rating plate. This
appliance is not convertible for use with other
gases, unless a certified kit is used.
Pour demander un exemplaire en français de ce Manuel
du propriétaire, visitez www.heatnglo.com/translations.
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.
• 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.

Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/152
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 Heat & Glo gas fireplace, an
elegant and clean alternative to wood burning fireplaces.
The Heat & Glo 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 Heat & Glo gas fireplace will give you years of
durable use and trouble-free enjoyment. Welcome to the
Heat & Glo family of fireplace products!
We recommend that you record the following pertinent
information about your fireplace.
Gas and Electric
Information
Serial Number
Type of Gas
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
Model Number
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
Heat & Glo, a brand of Hearth & Home Technologies
7571 215th Street West, Lakeville, MN 55044
Read this manual before installing or operating this appliance.
Please retain this owner’s manual for future reference.

3Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/15
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. Limited Lifetime Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . 4
1 Listing and Code Approvals
A. Appliance Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
B. 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. Clear Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
D. Decorative Fronts and Surrounds . . . . . . . . . . . . . . . . . . . 8
E. Fixed Glass Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
F. Remote Controls, Wall Controls and Wall Switches. . . . . . 8
G. IPI Battery Tray/Battery Installation . . . . . . . . . . . . . . . . . . 8
H. Control Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . 9
I. Before Lighting Fireplace . . . . . . . . . . . . . . . . . . . . . . . . . . 9
J. Lighting Instructions (IPI) . . . . . . . . . . . . . . . . . . . . . . . . . 10
K. After Appliance is Lit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
L. Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . 11
3 Maintenance and Service
A. Maintenance Tasks-Homeowner . . . . . . . . . . . . . . . . . . . 12
B. Maintenance Tasks-Service Technician . . . . . . . . . . . . . . 13
Installer Guide
4 Getting Started
A. Typical Appliance System. . . . . . . . . . . . . . . . . . . . . . . . . 15
B. Design and Installation Considerations . . . . . . . . . . . . . . 16
C. Tools and Supplies Needed . . . . . . . . . . . . . . . . . . . . . . . 16
D. Inspect Appliance and Components. . . . . . . . . . . . . . . . . 16
5 Fireplace Size Requirements
A. Minimum Fireplace Opening . . . . . . . . . . . . . . . . . . . . . . 17
B. Mantel and Wall Projections. . . . . . . . . . . . . . . . . . . . . . . 19
6 Termination Locations
A. Vent Termination Minimum Clearances . . . . . . . . . . . . . . 20
7 Installation Preparation
A. Inspection and Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . 21
B. Flue Damper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
C. Gas Line. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
D. Fireplace Conversion Notice . . . . . . . . . . . . . . . . . . . . . . 21
E. Electrical Outlet Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8 Installing Vent Pipe and Appliance
A. Vent Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
B. Venting Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
C. Connecting Vent Pipe. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
D. Placing, Securing and Leveling the Appliance . . . . . . . . . 23
E. Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
F. Installing Adaptor and Termination Cap . . . . . . . . . . . . . . 25
9 Gas Information
A. Fuel Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
B. Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
C. Gas Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
D. High Altitude Installations . . . . . . . . . . . . . . . . . . . . . . . . . 26
10 Electrical Information
A. Wiring Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
B. IntelliFire™ Plus Ignition System Wiring . . . . . . . . . . . . . 27
C. Optional Accessories Requirements . . . . . . . . . . . . . . . . 28
D. Fan Wiring with Remote. . . . . . . . . . . . . . . . . . . . . . . . . . 29
E. Control Module Operation . . . . . . . . . . . . . . . . . . . . . . . . 29
11 Finishing
A. Mantel and Wall Projections. . . . . . . . . . . . . . . . . . . . . . . 30
12 Appliance Setup
A. Remove Glass Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 31
B. Remove the Shipping Materials . . . . . . . . . . . . . . . . . . . . 31
C. Clean the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
D. Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
E. Glass Rock Media Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
F. Glass Panel Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . 31
G. Fixed Glass Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
H. Air Shutter Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
13 Troubleshooting
A. IntelliFire™ Plus Ignition System . . . . . . . . . . . . . . . . . . . 33
14 Reference Materials
A. Appliance/Decorative Front Dimension Diagrams . . . . . . 35
B. Vent Kits Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
C. Service Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
D. Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
= Contains updated information.




Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/154
B. Limited Lifetime 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


5Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/15
B. Limited Lifetime 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


Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/156
C. BTU Specifications
MODELS: COSMO-I30-C, COSMO-I35-C
LABORATORY: Underwriters Laboratories, Inc. (UL)
TYPE: Direct Vent Heater
STANDARD: ANSI Z21.88-2014 CSA 2.33-2014
Vented Gas Fireplace Heaters
This product is listed to ANSI standards for “Vented Gas
Fireplace Heaters” and applicable sections of “Gas Burn-
ing Heating Appliances for Manufactured Homes and
Recreational Vehicles”, and “Gas Fired Appliances for
Use at High Altitudes”.
Heat & Glo gas inserts are designed for installations into
solid fuel masonry or factory built fireplaces that have been
installed in accordance with the National, Provincial, State
and local building codes. Fireplaces are to be constructed
of non-combustible materials and, in the absence of local
or regional codes, meet criteria of NFPA 211. No additional
outside air source is required.
Models
(U.S. or Canada)
Maximum
Input
BTU/h
Minimum
Input
BTU/h
Orifice
Size
(DMS)
COSMO-I30-C (NG)
US
(0-2000 FT) 23,000 13,500 42
CANADA
(2000-4500 FT) 20,700 12,150 43
COSMO-I35-C (NG)
US
(0-2000 FT) 28,000 15,500 38
CANADA
(2000-4500 FT) 25,200 13,950 39
COSMO-I30-C (LP)
US
(0-2000 FT) 23,000 13,500 54
CANADA
(2000-4500 FT) 20,700 12,150 55
COSMO-I35-C (LP)
US
(0-2000 FT) 27,500 14,500 52
CANADA
(2000-4500 FT) 24,750 14,000 53
A. Appliance Certification
NOT INTENDED FOR USE AS A PRIMARY HEAT SOURCE.
This appliance is tested and approved as either supplemen-
tal room heat or as a decorative appliance. It should not be
factored as primary heat in residential heating calculations.
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.
NOTICE: This installation must conform with local codes.
In the absence of local codes you must comply with the
National Fuel Gas Code, ANSI Z223.1-latest edition in
the U.S.A. and the CAN/CGA B149 Installation Codes in
Canada.
1
1 Listing and Code Approvals
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,
Standard Test Method for Behavior of Materials in
a Vertical Tube Furnace at 750 ºC shall be considered
non-combustible materials.
F. Combustible Materials Specification
Materials made of or surfaced with wood, compressed pa-
per, plant fibers, plastics, or other material that can ignite
and burn, whether flame proofed or not, or plastered or
unplastered shall be considered combustible materials.
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.
B. Glass Specifications
This appliance is equipped with 5 mm ceramic glass. Re-
place glass only with 5 mm ceramic glass. Please contact
your dealer for replacement glass.

7Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/15
2
2 Operating Instructions
Figure 2.1 General Operating Parts
B. Your Fireplace
WARNING! DO NOT operate fireplace before read-
ing and understanding operating instructions. Failure
to operate fireplace according to operating instructions
could cause fire or injury.
DECORATIVE DOORS
(NOT SHOWN)
SECTION 2.D.
MANTEL
SECTION
5.B AND
11.A
FIXED GLASS ASSEMBLY
(NOT SHOWN)
SECTION 12.F.
HEARTH
CLEAR SPACE
SECTION 2.C.
APPLIANCE INSTALLED IN EXISTING
SOLID FUEL FIREPLACE
User Guide
A. Gas Fireplace Safety
WARNING! DO NOT operate fireplace before reading
and understanding operating instructions. Failure
to operate fireplace according to operating instructions
could cause fire or injury.
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.
• 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 fire-
place for an extended period of time (summer months,
vacation/trips, etc):
• Remove batteries from remote controls.
• Turn off wall controls.
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.
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.

Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/158
C. Clear Space
WARNING! DO NOT place combustible objects in front
of the fireplace or block louvers. High temperatures 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
E. Fixed Glass Assembly
See Section 12.F.
D. Decorative Fronts and Surrounds
WARNING! Risk of Fire! Install ONLY decorative fronts
or surrounds approved by Hearth & Home Technologies.
Unapproved decorative fronts may cause appliance to
overheat.
This appliance has been supplied with an integral
barrier to prevent direct contact with the fixed glass
panel. DO NOT operate the appliance 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 front.
F. Remote Controls, Wall Controls and Wall
Switches
Follow the instructions supplied with the control installed
to operate your fireplace:
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.
CLEAR SPACE
3 FT. IN FRONT OF FIREPLACE
APPLIANCE INSTALLED IN EXISTING
SOLID FUEL FIREPLACE
G. IPI Battery Tray/Battery Installation
The IntelliFireTM Plus system has a battery backup option.
Battery longevity and performance will be affected by the
service temperatures of this appliance.
NOTICE: Batteries should only be used as a power source
in the event of an emergency such as an outage.

9Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/15
I. Before Lighting Fireplace
Before operating this fireplace for the first time, have a
qualified 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 oper-
ate fireplace with fixed glass assembly removed.
• An Intellifire™ Plus ignition system is standard with this
appliance.
Figure 2.3 Control Module
H. Control Module Operation
1. The control module has an ON/OFF/REMOTE selector
switch that must be set. See Figure 2.3.
OFF Position: Appliance will ignore all power inputs and
will not respond to any commands from a wall switch or
remote. The unit should be in the OFF position during
installation, service, battery installation, fuel conversion,
and in the event that the control goes into LOCK-OUT
mode as a result of an error code.
ON Position: Appliance will ignite and run continuously
in the HI flame setting, with no adjustment in flame
output. This mode of operation is primarily used for
initial installation or power outage operation with battery
backup.
REMOTE Position: Appliance will initiate commands
from an optional wired wall switch and/or the wireless
remote (RC300).
2. If using a wired wall switch with the module in REMOTE
mode, the flame output can be adjusted with the HI/LO
selector switch on the module. See Figure 2.3. Note
that the flame HI/LO selector switch will become inactive
once an optional remote control (RC200/RC300) is
programmed to the control module. Note that the control
module will always ignite the fireplace on HI and remain
so for the initial 10 seconds of operation. If the HI/LO
is switched to the LO position, the flame output will
automatically drop to the lowest setting after the flame
has been established for 10 sec. After this 10 second
period, the flame can be adjusted from HI to LO with
the switch.
3. The control module has safety feature that automatically
shuts down the fireplace after 9 hours of continuous
operation without receiving a command from the RC300
remote.
4. If you intend to use both an optional wired wall switch
and the RC300 remote control to operate your fireplace,
the wall switch will override any commands given by
the remote.
5. Module Reset
This module may lock-out under certain conditions.
When this occurs, the appliance will not ignite or
respond to commands. The module will go into
lock-out mode by emitting three audible beeps, then
continuously displaying a RED/GREEN error code at
its status indicator LED.
• Check battery tray. Remove batteries if installed.
Batteries should only be installed for use during power
outages. See Section G.
• Locate the module selector switch. (See Figure 2.3).
• Set the module selector switch to the OFF position.
• Wait five (5) minutes to allow possible accumulated gas
to clear.
• Set the module selector switch to ON or REMOTE
position.
• Start the appliance.
WARNING! Risk of Explosion! DO NOT press the mod-
ule reset switch more than one time within a five minute
time period. Gas may accumulate in firebox. Call a quali-
fied service technician.
Nine Hour Safety Shutdown Feature
The appliance has a safety feature that automatically
shuts down the fireplace after nine hours of continuous
operation without receiving a command from the wall
switch or optional remote.
NG/LP GAS-TYPE
SELECTOR SWITCH
SELECTOR
SWITCH
FLAME HI/LOW
SWITCH
STATUS
INDICATOR LED
MODULE

Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/1510
J. Lighting Instructions (IPI)
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

11Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/15
Initial Break-in Procedure
• The appliance should be run three to four hours
continuously on high.
• Turn the appliance off and allow it to completely cool.
• Remove fixed glass assembly. See Section 12.F.
• Clean fixed glass assembly. See Section 3.
• Replace the fixed glass assembly and run continuously
on high an additional 9 hours.
This cures the materials used to manufacture the fire-
place.
NOTICE! Open windows for air circulation during ap-
pliance break-in.
• Some people may be sensitive to smoke and odors.
• Smoke detectors may activate.
K. After Appliance is Lit
L. 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 al-
lowed 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 the paint and the burning off of any oils remaining from manufacturing. Odor may
also be released from finishing materials and adhesives used around the appliance.
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 to remove deposits left by oils from the manufacturing
process. A non-abrasive cleaner such as gas fireplace 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 intermittent pilot 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.

Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/1512
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 res-
idue that can stain carpeting or floor surfaces.
•Remove decorative front from appliance and set aside
on work surface.
• See Section 12.G 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 appliance.
Hold glass in place with one hand and secure glass
latches with the other hand.
• Reinstall 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 appliance must be
kept clean.
CAUTION! Risk of Burns! The appliance should be
turned off and cooled before servicing.
When properly maintained, your appliance will give you
many years of trouble-free service. We recommend an-
nual service by a qualified technician.
Surrounds, Decorative 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 or dust surfaces.
Remote Control
Frequency: Seasonally
By: Homeowner
Tools needed: Replacement batteries and remote con-
trol instructions.
• 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.
Any safety screen or guard removed for servicing must be
replaced prior to operating the appliance.
Installation and repair should be done by a qualified techni-
cian only. The appliance should be inspected before use
and at least annually by a professional service person.

13Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/15
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 construc-
tion (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.
B. Maintenance Tasks-Service Technician
The following tasks must be performed by a qualified
technician.
Gasket Seal and Glass Assembly Inspection
Frequency: Annually
By: 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.
Firebox
Frequency: Annually
By: 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 appliance if firebox has been perforated.
Control Compartment and Firebox Top
Frequency: Annually
By: 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.

Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/1514
Burner Ignition and Operation
Frequency: Annually
By: Service Technician
Tools needed: Protective gloves, vacuum cleaner, whisk
broom, flashlight, voltmeter, indexed drill bit set, and a
manometer.
• Verify burner is properly secured and aligned with pilot
or igniter.
• Clean off burner top, inspect for plugged ports, corrosion
or deterioration. Replace burner if necessary.
• Verify batteries have been removed from battery back-up
IPI systems to prevent premature battery failure or
leaking. For optimal battery life, locate the battery
pack outside of the control cavity on the hearth. This
placement will reduce the chances of overheating the
batteries during extended burns which could result in
reduced battery life or degradation.
• 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 12.G 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 thermocouple/thermopile or 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)
Figure 3.1 IPI Pilot Flame Patterns

15Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/15
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
VERTICAL TERMINATION CAP
(SECTION 8.F)
VENT PIPE
(SECTION 8)
GAS LINE (SECTION 9)
ACCESS THROUGH EXISTING
MASONRY OR WOODBURNING
FIREPLACE
HEARTH EXTENSION
SURROUND OR FRONT
NOT SHOWN
SECTION 2.D AND 8.D.
MANTEL AND MANTEL LEG
SECTION 5.B AND 11.A
3 INCH FLEX LINERS
(SECTION 8)
Figure 4.1 Typical System
4
4 Getting Started
Installer Guide

Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/1516
B. Design and Installation Considerations
Heat & Glo gas inserts are designed for installations into
solid fuel masonry or factory built fireplaces that have
been installed in accordance with the National, Provin-
cial, State and local building codes. Fireplaces are to be
constructed of non-combustible materials and, in the ab-
sence of local or regional codes, meet criteria of NFPA
211. No additional outside air source is required.
Installation MUST comply with local, regional, state and na-
tional codes and regulations. Consult insurance carrier, local
building inspector, fire officials or authorities having jurisdic-
tion over restrictions, installation inspection and permits.
Prior to installing the gas insert:
• Have the chimney and adjacent structure inspected
and cleaned by qualified professionals. Hearth & Home
Technologies recommends that NFI or CSIA certified
professionals, or technicians under the direction of certi-
fied professionals, conduct a minimum of a NFPA 211
Level 2 inspection of the chimney.
• Replace component parts of the chimney and fireplace
as specified by the professionals.
• Ensure combustible mantel and surround clearances
comply with applicable codes and regulations for solid-
fuel fireplaces. In the absence of local or regional codes,
refer to NFPA 211.
• Ensure all joints are properly engaged and the chimney
is properly secured.
• Minimum fireplace size. See Section 5.A.
• Gas supply piping requirements.
• Electrical wiring requirements.
• Finishing details.
• Whether optional accessories—devices such as a wall
switch or remote control—are desired.
D. Inspect Appliance and Components
• Carefully remove the appliance and components from
the packaging.
• The vent system components and decorative 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 instal-
lation. 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, in-
complete or substitute components. Keep appliance dry.
C. Tools and Supplies Needed
Before beginning the installation be sure that the following
tools and building supplies are available.
Tape measure Framing material
Pliers Flat blade screwdriver
Hammer Phillips screwdriver
Gloves Framing square
Voltmeter Electric drill and bits (1/4 in.)
Plumb line Safety glasses
Level Reciprocating saw
Manometer Noncorrosive leak check solution
1/2 - 3/4 inch length, #6 or #8 Self-drilling screws
Caulking material (300º F minimum continuous exposure
rating)
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.
WARNING! Risk of Fire,/Explosion/Electric Shock!
DO NOT use this appliance if any part has been under
water. Call a qualified technician to inspect the appliance
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
technician, service agency or your dealer.
Installation and service of this appliance should
be performed by qualified personnel. Hearth &
Home Technologies suggests NFI certified or
factory trained professionals, or technicians
supervised by an NFI certified professional.

17Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/15
5
5 Fireplace Size Requirements
A. Minimum Fireplace Opening
Minimum fireplace opening requirements for a standard 3/4
inch deep surround are shown in Figure 5.2. For smaller
openings, an optional 1-1/2 inch deep surround is available
and dimensions are shown in Figure 5.3.
WARNING! Risk of Fire or Burns! Provide adequate
clearance around air openings and for service access.
Due to high temperatures, the appliance should be locat-
ed out of traffic and away from furniture and draperies.
• The firebrick (refractory), glass doors, screen rails, screen
mesh and log grates can be removed from a factory
built firebox in order to gain minimum gas insert opening
requirements.
• Any smoke shelves, shields and baffles may be removed
from the factory built firebox if attached with mechanical
fasteners.
• The metal floor of the solid fuel firebox may be removed
to facilitate the installation of the insert.
• Cutting of any sheet metal parts of the fireplace in which
the gas fireplace insert is to be installed is prohibited,
except the floor as tested for and as noted above and in
Figure 5.1.
• A minimum 1/2 inch gap from the bottom of the
appliance to the metal floor of the solid fuel firebox is
RECOMMENDED for optimal fan performance. See
side view in Figure 5.1
Figure 5.1-A
SIDE VIEW
6 IN.
5 IN.
3 IN.
9 IN. METAL INSERT
FACTORY BUILT FIREBOX
6 IN.
5 IN.
3 IN.
9 IN.
METAL FLOOR OF EXISTING
SOLID FUEL FIREBOX
TOP VIEW
REMOVE THIS
SECTION OF
METAL FLOOR
REMOVE THIS
SECTION OF
METAL FLOOR
1/2 IN. MINIMUM LEVELING HEIGHT
(RECOMMENDED)
1/4 IN. REQUIRED
METAL FLOOR OF EXISTING SOLID FUEL FIREBOX
• The appliance may not be placed directly on the base of
the outer wrap, a 1/4 inch airspace MUST be provided
between the insert and the floor of the outer wrap. Use
the leveling legs to raise the insert a minimum of 1/4 inch.
The original fireplace may never be returned to solid
fuel in this condition. The sidewalls and top structure
of the firebox may not be altered with the exception of
removable baffles and dampers.
• If a minimum 1/2 inch gap can not be achieved, a section
of the factory-built metal floor can be removed. See
Figure 5.1-B.
Figure 5.1-B

Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/1518
Figure 5.2 Fireplace Opening
In addition to these dimensions, also reference Clearances and Mantel Projections (Section 5.B).
**Unit depth is measured to the back of the surround to give the depth needed for installation.
TOP VIEW FRONT VIEW SIDE VIEW
MINIMUM FIREPLACE SIZE
Location
COSMO-I35-C COSMO-I30-C
Inches Millimeters Inches Millimeters
A Rear Width 23-7/16 595 20-3/16 513
B Front Width 34-5/8 879 30-5/8 778
C Glass Opening Width 31-5/8 803 27-1/2 699
D Glass Opening Height 15-11/16 398 12-3/16 310
E Height-Front 24-1/16 611 20-7/16 519
F Height-Rear 21-1/8 537 17-5/8 448
G** Unit Depth 15-3/4 400 14-3/4 375
H Venting Depth 10-5/8 270 9-1/2 241
IHeight to Top of
Glass Frame 21-5/8 549 18-1/4 464
* Note: If exhaust collar on insert and fireplace damper do not line up, add 4 inches (102 mm) to minimum
fireplace height for bends in vent pipe.
ED
C
IF
B
A
G
H


19Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/15
B. Mantel and Wall Projections
WARNING! Risk of Fire! Comply with all minimum clear-
ances to combustibles as specified. Framing or finishing
material closer than the minimums listed must be construct-
ed entirely of noncombustible materials (i.e., steel studs,
concrete board, etc).
Clearance to combustible material under the insert is 1/4
inch (6 mm). Clearance from top of fireplace opening for
combustibles extending 12 inches max. is 12 inches.
• Use leveling legs to raise insert minimum 1/4 inch (6 mm)
above combustible material or outer wrap of factory built
firebox.
Combustible facings must not extend behind the insert
surround. For non-combustible material specifications
refer to section 1.E.
Figure 5.4 Mantel Clearances
12 IN. MIN.
12 IN. MAX.
EXISTING NON-COMBUSTIBLE FACING
10 IN. MIN.
2 IN.
MAX.
Figure 5.3 Fireplace Opening - Deep Surround
CD
SURROUND
APPLIANCE
1-1/2 IN.
BD
AD
APPLIANCESURROUND
MINIMUM FIREPLACE SIZE
Location
COSMO-I35-C COSMO-I30-C
Inches Millimeters Inches Millimeters
ADAlternate Unit Width 33-3/16 843 29-1/16 738
BDAlternate Unit Depth 15-1/16 383 13-7/8 352
CDAlternate Unit Height 22-9/16 573 19-1/16 484
* Note: If exhaust collar on insert and fireplace damper do not line up, add 4 inches (102 mm) to minimum
fireplace height for bends in vent pipe.
TOP VIEW
SIDE VIEW

Heat & Glo • Cosmo-I30-C, Cosmo-I35-C • 2239-901 Rev. S • 3/1520
A. Vent Termination Minimum Clearances
Roof Pitch H (Min.) Ft.
Flat to 6/12...........................................................1.0*
Over 6/12 to 7/12.................................................1.25*
Over 7/12 to 8/12.................................................1.5*
Over 8/12 to 9/12.................................................2.0*
Over 9/12 to 10/12...............................................2.5*
Over 10/12 to 11/12 .............................................3.25
Over 11/12 to 12/12 .............................................4.0
Over 12/12 to 14/12.............................................5.0
Over 14/12 to 16/12.............................................6.0
Over 16/12 to 18/12.............................................7.0
Over 18/12 to 20/12.............................................7.5
Over 20/12 to 21/12.............................................8.0
Figure 6.1 Minimum Height From Roof To Lowest Discharge
Opening
* 3 foot minimum in snow regions
HORIZONTAL
OVERHANG
VERTICAL
WALL
GAS DIRECT VENT
TERMINATION CAP
12
X
ROOF PITCH
IS X/ 12
LOWEST
DISCHARGE
OPENING
2 FT.
MIN.
20 INCHES MIN.
H (MIN.) - 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 fire.
WARNING