BTU/HR: 400,000

Tradesman 400 Ultra DF Fuel Type: Dual Fuel (LP/NG)

Put heat right where you need it with the Tradesman® 400 Ultra DF dual fuel forced-air heater. Operate from propane or natural gas with the turn of a selector value. Start-up is easy with a dependable electronic ignition and time-tested design. With a variable rate valve and thermostatic control, save fuel and run optimally at 250,000 to 400,000 BTU per hour.

Manufactured in Wisconsin from durable components to provide years of dependable performance. Made with the industry’s heaviest gauge combustion chamber, and Tri-shield™ coated case that protects against abrasion and corrosion.

Loaded with reliable safety features. Certified to CSA and ANSI standards. Backed by a two-year warranty and lifetime of technical support.

Tradesman® heaters are direct fired therefore require proper ventilation. Always install and use the heater in accordance with the owner’s manual and instructions.


  • Easy to operate with dependable 3-trial ignition system and diagnostic lights
  • 99% direct-fired fuel efficiency boosted by variable output controls and thermostatic control
  • Built to last with industry’s heaviest gauge combustion chamber and burner plate, and Tri-shield coated steel case protects against abrasion and corrosion
  • Can quickly switch from NG to LP
  • Hose and regulator included


Tradesman® 400 Ultra DF
BTU/HR Rating 175,000 / 400,000
Heated Air Output (CFM) 1,050
Fuel Type LP/NG
Fuel consumption LP gas min/ max (lb/hr) 11.6 / 18.6
Fuel Consumption NG gas min/max (cu. ft./hr) 175 / 400
Inlet Gas Pressure LP Gas 1.5 PSIG
Inlet Gas Pressure NG min/max 1.5 PSIG
Amps (start/continuous) 4.0 / 1.3
Service Saver (Self-Diagnostics) Yes
L x W x H (in.) 34.5 x 12.5 x 21.5
Shipping Weight (lbs) 55.0
Case Material Tri-Shield
High Temp Safety Switch Yes
Air Flow Safety Switch Yes
Gas Pressure Regulator Standard (w/POL)
Unit Mount Thermostat Standard
Gas Hose Standard
Certification U.S. Only


Additional parts & accessories are available here.


Schematics, setup instructions, and more for Tradesman® 400 Ultra DF Gas Forced Air Portable Heaters.


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