Heatilator • NDI30, NDI30-SP, NDI35, NDI35-SP, NDI30-SPFK, NDI35-SPFK • 2226-900 Rev. G • 4/11 6

C. BTU Specifi cations

MODELS: NDI30, NDI30-SP, NDI35, NDI35-SP,
NDI30-SPFK, NDI35-SPFK
LABORATORY: Underwriters Laboratories, Inc. (UL)
TYPE: Vented Gas Fireplace Heater
STANDARD: ANSI Z21.88-2009 CSA 2.33-2009
Vented Gas Fireplace Heaters
This product is listed to ANSI standards for “Vented Gas
Appliance 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”.
Heatilator gas inserts are designed for installations into
solid fuel masonry or factory built fi replaces 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
Orifi ce
Size
(DMS)
NDI30, NDI30-SP,
NDI30-SPFK (NG)
US
(0-2000 FT) 32,000 25,000 #35
CANADA
(2000-4500 FT) 28,800 23,500 #36
NDI35, NDI35-SP,
NDI35-SPFK (NG)
US
(0-2000 FT) 35,000 26,000 #33
CANADA
(2000-4500 FT) 33,250 25,500 #34
NDI30, NDI30-SP,
NDI30-SPFK (LP)
US
(0-2000 FT) 31,000 25,000 #51
CANADA
(2000-4500 FT) 27,500 22,500 #52
NDI35, NDI35-SP,
NDI35-SPFK (LP)
US
(0-2000 FT) 35,000 26,000 #50
CANADA
(2000-4500 FT) 31,000 25,000 #51

A. Appliance Certifi cation

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
orifi ce 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.
1Listing and Code Approvals

E. Non-Combustible Materials Specifi cation

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 and UL763 shall be
considered non-combustible materials.

F. Combustible Materials Specifi cation

Materials made of or surfaced with wood, compressed pa-
per, plant fi bers, plastics, or other material that can ignite
and burn, whether fl ame 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 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 Specifi cations

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.