Boss™ Direct-Fired Portable Heater

Boss™ Heavy Duty Heater

Boss Direct-Fired Heater
Combines 99% fuel efficiency with the ability to distribute heat into large construction or industrial spaces.

No Parts or Downtime to:
  • Change fuel
  • Confirm onsite voltage
  • Manage heat output
Truly Portable
  • Cool-end handle
  • No-flat wheels
  • Stackable
Job Site Tough
  • Indoor/outdoor rated
  • Rust resistant
More Than Heat
  • Vent mode feature moves air like a fan
  • Diagnostic light for quicker troubleshooting
  • 10-side case for easy inside-out access
  • Stands on end

L.B. White Boss Direct-Fired heater in a commercial building construction.

Models: 400 DF
BTU/H Rating 400,000
Fuel Type Dual Fuel - LP/NG
Ignition Type Spark
Fuel Consumption LP Gas Min/Max (lbs./hr) 18.56
Fuel Consumption Natural Gas Min/Max (cu.ft/hr) 400
Blower Fan Output (CFM) 2,500
Inlet Gas Pressure LP Min/Max (in w.c) 7"/13.5"
Inlet Gas Pressure NG Min/Max (in w.c) 7"/13.5"
Amps (Starting/Continuous Operation) 27.2/7.1
Electric Supply (Volts/Hz/Phase) 120/60/1
Motor Horsepower 1/2 HP
Length (in) 50
Width (in) 21.25
Height (in) 22.5
Unit Weight (lbs) 125.0
Built-In Volt Meter Yes
Built-In Thermostat Yes
Vent Mode Yes
Ductable No
Omni Certified US/Canada Omni certified to CSA standards for U.S. and Canada

⚠ WARNING: When operating, this heater produces chemicals, including Carbon Monoxide, known to the State of California to cause birth defects and other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Boss™ Heavy Duty Heater

Boss Direct-Fired Heater

Bigger job site? No problem. Boss™ heaters combine 99% fuel efficiency with the ability to distribute heat into large construction or industrial spaces. Loaded with features that benefit owner and operator, these direct-fired heaters are engineered to be job site tough and work as hard as you do.


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