BTU/HR: 400,000

Foreman 230 DF Fuel Type: Dual Fuel (LP/NG)

The Boss™ 400 DF combines 99% fuel efficiency with high CFM to distribute big heat into large construction and industrial spaces. Loaded with features that benefit owner and operator, these direct-fired heaters are engineered to be job site tough and rental-ready. Manufactured in Wisconsin from durable components to provide years of dependable performance. Buy this certified portable heater with confidence – backed by a 2-year warranty and lifetime of technical support.


  • Most efficient heat for large spaces
  • Easy to operate with onboard volt meter and status light
  • 99% direct-fired fuel efficiency boosted by onboard thermostat and option to move air only like a fan
  • hardware protects against abrasion and corrosion
  • True portability with cool end handle, wheels, and fit through a standard 36” door frame
  • Saves storage space with option to stand on end or stack
  • Built to last with Tri-shield™ coated steel case


Boss™ 400 DF
BTU/HR Rating 400,000
Blowr Fan Output (CFM) 2,500
Fuel Type Dual Fuel - LP/NG
Ignition Type Spark
Fuel Consumption LP Gas min/max (lbs/hr) 18.6
Fuel Consumption NG min/max (cu ft/hr) 400
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 (start/continuous) 27.2/7.1
Electric supply (volts/hz/phase) 120/60/1
Motor horsepower 1/2
L x W x H (in.) 50 (with handle) x 21.3 x 22.5
Unit Weight (lbs) 125.0
Built-in Volt Meter Standard
Built-in Thermostat Standard
Vent Mode (fan Only) Standard
Omni U.S./CA Certified Yes



Regulator (DF)
Part #: 25141

Sold separately.

Gas Hose

Gas Hose 3/4 in. x 15 ft
Part #: 25965

Sold separately.

Additional parts & accessories are available here.


Schematics, setup instructions, and more for Boss™ 400 DF Indirect-Fired Portable Heaters.


Identify the replacement parts you may need for Boss™ 400 DF Indirect-Fired Portable Heaters.