Intertek Directory of Building Products

Johnson Gas Model M50 Direct Vent Room Heater Company: Johnson Gas Appliance Company

Product Direct Vent Gas Fireplace Heater
Brand Name Mendota
Description The model M50 Greenbriar vented direct vent gas fireplace is designed to be built into surrounding construction.  It is equipped and operated with a piezo/standing pilot ignition system.  The unit front contains a glass panel for viewing the flame and simulated wood logs.
Models M50 Greenbriar
Model Similarity None
Ratings 120V, <1.5A, 60 Hz

APPLIANCE RATINGS
  NATURAL GAS PROPANE
Model M50
Input rating (Btu/hr) 0-610 m 50000 50000
Maximum output (Btu/hr) 0-610 m 36600 38300
Minimum input (Btu/hr) 0-610 m 15800 16200
Orifice size (DMS) 0-610 m  F/R 35/43 54/51
Input rating (Btu/hr) 610-1370 m 48000 47600
Orifice size (DMS) 610-1370 m  F/R 36/44 55/52
Manifold pressure (in. w.c./kPa) 3.5/0.87 10/2.49
Manifold pressure, Low setting (in. w.c./kPa) 0.9/0.22               2.8/0.70       
Minimum inlet pressure (in. w.c./kPa) 5/1.25 11/2.74
Minimum air shutter settings in (mm) F/R 0.125/0.125 (3.2/3.2) 0.375/0.25 (9.5/6.4)
 
VENTING
Vent Type Coaxial
Vent Size 5-in intake, 8-in exhaust
Max. Vertical Length 51-feet
Min. Vertical Length 10-feet
Max. Horizontal Length 24-feet
Min. Horizontal Length 6-inches
Max. Horizontal Length at Min. Vertical Length 3-feet horizontal from 90° elbow off starter collar
Min. Vertical Length at Max. Horizontal Length 4-feet vertical from 90° elbow and 24-feet horizontal.
Max. Number of Elbows 4

CLEARANCES TO COMBUSTIBLE CONSTRUCTION
FIREPLACE CLEARANCES
Front sidewall 18-in
Mantle (from floor) 50-in (with 8-in deep mantle)
Top stand-offs (enclosure) 0-in
Sides (enclosure) 0-in
Back (enclosure) 1-in
Listing Report Return to Search
Attributes
CriteriaANSI Z21.88 (2019) (R2024)
CSI Code10 30 00 Fireplaces and Stoves
Fuel TypePropane
Fuel TypeNatural Gas
Listing SectionGAS-FIRED VENTED ROOM HEATERS
Spec ID14170
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