Intertek Directory of Building Products

JOHNSON GAS MODEL ML54 DIRECT VENT GAS FIREPLACE Company: Johnson Gas Appliance Company

Product Direct Vent Gas Fireplace Heater
Brand Name Mendota
Description The model ML54 is a direct vented gas fireplace suitable for use with natural gas or propane.  The unit is factory installed for use with natural gas.  A gas appliance conversion kit is provided to convert the fireplace to propane.
The model ML54 features an automatic intermittent/standing pilot ignition system.  A remote control is provided with the appliance to turn the fireplace off and on.
Models ML54, ML54-C
Model Similarity Models ML54 and ML54-C are identical, other than the ML54-C uses a SIT 0.584.625 control board with a 7-day timer for the pilot burner.
Ratings 120V, <1.5A, 60 Hz

APPLIANCE RATINGS
  NATURAL GAS PROPANE
Model ML54
Input rating (Btu/hr) 0-1370 m 41,000 41,000
Minimum input (Btu/hr) 0-1370 m 27,000 33,000
Orifice size (DMS) 0-1370 m 1/8” 49
Manifold pressure (in. w.c./kPa) high 0-610 m 3.5/0.85 10.0/2.5
Manifold pressure (in. w.c./kPa) Low 1.6/0.40 6.4/1.59
Manifold pressure (in. w.c./kPa) high 610-1370 m 4.8/1.2 11.9/2.96
Minimum inlet pressure (in. w.c./kPa) 5/1.25 11/2.74
Air shutter settings (in) 1/8” 3/8”

VENTING
Vent Type Coaxial
Vent Size 5-in intake, 8-in exhaust
Max. Vertical Length 40-feet
Min. Vertical Length 10-feet
Max. Horizontal Length 32-feet
Min. Horizontal Length 6-inches
Max. Horizontal Length at Min. Vertical Length 12-in horizontal from 9-in rise with 90° elbow
Min. Vertical Length at Max. Horizontal Length 4-feet vertical from 90° elbow and 32-feet horizontal.
Max. Number of Elbows 3

CLEARANCES TO COMBUSTIBLE CONSTRUCTION
FIREPLACE CLEARANCES
Front sidewall 16-in
Mantle (from floor) 53-in (with 8-in deep mantle)
Top stand-offs (enclosure) 0-in
Sides (enclosure) 0.5-in
Back (enclosure) 0.5-in
Listing Report Return to Search
Attributes
CriteriaANSI Z21.88 (2017)
CriteriaCSA 2.33 (2017)
CSI Code10 30 00 Fireplaces and Stoves
Fuel TypePropane
Fuel TypeNatural Gas
Listing SectionGAS-FIRED VENTED ROOM HEATERS
Spec ID46071
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