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S405 Direct Fired Heater

The S405 Portable Direct Fire Heater, available for rent from On Site Companies, is the smallest direct fired heating solution that we provide. This portable heater is CSA Approved for unintended use, which makes it easy to keep your job site  warm. It is also light enough so only one person is needed for operation. It is designed for use on construction sites and has a thermostat to help conserve fuel.


  • CSA approved for unattended operation
  • Light enough for one-man operation
  • Dual Fuel – Quick changeover from propane to natural gas
  • Air flow switch and Hi limit switch ensures safe operation
  • Thermostat to conserve fuel
  • Optional wheel kit available
  • Steel construction ensures durability

The S405 Direct Fired Heater Available in:

  • Minneapolis/ St. Paul, Minnesota
  • Rochester, Minnesota
  • Mankato, Minnesota
  • St. Louis, Missouri
Description Specification
Input 400,000 BTU/hr
Fuel Vapor Propane/Natural Gas
Gas Consumption 4.4 GPH Propane/400 CFH NG
Gas Connection 1” NPT
Electrical 120 Volts 12 amp circuit
Fan 2000 CFM 1/4 HP
Thermostat On/Off
Temp Rise 344°F
Weight 95 lbs.
Gas Supply Inlet Pressure
Max W.C. Min W.C.
Propane 14 7″
Natural Gas 14 7″