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Listing and Code Approvals
A. Appliance Certification
MODELS: CNXT4236IT-D, CNXT4842IT-D,
CNXT4236IH-D, CNXT4842IH-D
LABORATORY: Underwriters Laboratories, Inc. (UL)
TYPE: Direct Vent Gas Appliance Heater
STANDARD: ANSI Z21.88-2014 • CSA 2.33-2014
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".
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.
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.
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.
C. BTU Specifications
Models
(U.S. or Canada)
US
(0-2000 FT)
CNXT4236IT-D (NG)
CANADA
(2000-4500 FT)
US
(0-2000 FT)
CNXT4236IT-D (LP)
CANADA
(2000-4500 FT)
US
(0-2000 FT)
CNXT4236IH-D (NG)
CANADA
(2000-4500 FT)
US
(0-2000 FT)
CNXT4236IH-D (LP)
CANADA
(2000-4500 FT)
Heatilator • CNXT4236IT-D, CNXT4842IT-D, CNXT4236IH-D, CNXT4842IH-D • 2360-900 Rev. i • 5/17
Maximum
Minimum
Orifice
Input
Input
Size
BTU/h
BTU/h
(DMS)
40,000
23,000
0.124
36,000
20,700
32
36,000
19,000
50
32,400
17,100
49
40,000
23,000
0.124
36,000
20,700
32
36,000
19,000
50
32,400
17,100
49
Models
(U.S. or Canada)
US
(0-2000 FT)
CNXT4842IT-D (NG)
CANADA
(2000-4500 FT)
US
(0-2000 FT)
CNXT4842IT-D (LP)
CANADA
(2000-4500 FT)
US
(0-2000 FT)
CNXT4842IH-D (NG)
CANADA
(2000-4500 FT)
US
(0-2000 FT)
CNXT4842IH-D (LP)
CANADA
(2000-4500 FT)
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.
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.
Maximum
Minimum
Orifice
Input
Input
Size
BTU/h
BTU/h
(DMS)
45,000
25,000
30
40,500
22,500
31
40,000
21,500
48
36,000
19,350
49
45,000
25,000
30
40,500
22,500
31
40,000
21,500
48
36,000
19,350
49
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