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Hearth & Home Technologies • Fireside Burner/Hearth Kits • 4004-304 Rev C • 08/2010
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1
Listing and Code Approvals
A. Appliance Certification
The Gas Log Hearth Kits have been tested and listed in the
U.S. in accordance with ANSI Z21.84-2003 (Gas Log Set).
They have been listed by OMNI Test Labs for installation and
operation in the United States and Canada as described in
these Installation and Operating Instructions. All components
are UL, OMNI or CSA safety certified.
Check with your local building code agency prior to installing
this appliance to ensure compliance with local codes,
including the need for permits and follow-up inspections. In
the absence of local codes, comply with the National Fuel
Gas Code, ANSI Z223.1-Latest Edition in the U.S. If any
assistance is required during installation, please contact
your local dealer or call the Technical Services Department
at 1-888-427-3973 or 1-800-927-6841.
B. Table 1
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.
WARNING
Fire Risk
Exhaust Fumes Risk
• Do NOT use this appliance as a “vent-free
heater.
The flue must be permanently open. Refer
to Table 1.
WARNING
Product MHK18NG MHK24NG STMHK18NG STMHK24NG
Inlet BTU / KW /HR Nat. 74,000 / 21.7 84,000 / 24.6 65,000 / 19 75,000 / 22
Max. Inlet Pressure
IN. WC / KPa
Nat. 10.0 / .052 10 / .052 10.0 / .052 10.0 / .052
Min. Inlet Pressure IN.
WC / KPa
Nat. 3.5 / .018 3.5 / .018 3.5 / .018 3.5 / .018
Orifice Size
In. / mm
Nat. (#26) .147 (#20) .161 (#30) .128 (#28) .141
Minimum Fireplace
Opening Size
In. / cm
Front 28 / 71.1 34 / 86.4 28 / 71.1 34 / 86.4
Rear 16 / 40.6 18 / 45.7 - -
Depth 14 / 35.6 16 / 40.6 16 / 40.6 16 / 40.6
Height 16 / 40.6 18 / 45.7 18 / 45.7 18 / 45.7
Min. Vent Opening in
Square In. / cm
39 / 251.6 48 / 309.7 39 / 251.6 48 / 309.7