Restroom Calculator

Need an estimate for how many porta potties your event needs? Use this handy calculator! For a more specific quote tailored to your needs, call us today at 800-210-8407!

special events calculator

Portable Heat Calculator

Need an estimate for how many BTU's you'll need to heat up your space? Use this handy calculator! For a more specific quote tailored to your needs, call us today at 800-210-8407!

Heating Calculator
*Please press the "tab" key on your keyboard or click out of the field after entering all fields to ensure the calculation is correct.


3050 Direct Fired Heater



Input 3,500,000 BTU Hi Fire / 1,200,000 BTU Lo Fire
Fuel Vapor Propane/Natural Gas
Gas Consumption 44 GPH Propane/ 4,000 CFH Natural Gas
Gas Connection 3/4″ FNPT
Electrical 240V 1Ø 30 Amps
Fan 16,000 CFM 5.0 HP 3″ SP
Thermostat HI-LO Standard
Temp Rise 241°F
Weight 460 lbs.

The 3050 Direct Fired Heater is safe to use at low housing temperatures and can run on either vapor propane, liquid propane or natural gas. Ductable up to 300 feet, it also has two levels of output for heating options. Also with a weather sealed control box, this heater can be used at any time of year.


  • Safe fuel shutdown if combustion air is interrupted
  • Low housing temperature
  • May be ducted up to 300 feet
  • Safe monitoring of combustion, two trial electronic ignition with 20 second pre-purge time delay and 7 second shutdown
  • Direct wire with easy, safe 100% power shut off
  • Protects heater by shutting down if unit is being overfired
  • Helps in diagnosing specific gas flow problems
  • Protects heater by shutting down if voltage is too low
  • Easy monitoring of control voltage to ensure trouble-free operation
  • Automatically cycles the heater high-

The 3050 Direct Fired Heater Available in:

  • Minneapolis/ St. Paul, Minnesota
  • Rochester, Minnesota
  • Mankato, Minnesota
  • St. Louis, Missouri

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I have a special event with an estimated attendees, for hours.
  • Will there be more women than men?
  • Will there be alcohol served?

Our phone system will temporarily be shut down for maintenance on Saturday, July 24. For emergency assistance during this time, please call your branch’s corresponding after hours phone number directly. See onsiteco.com/locations for phone number listings. Thank you.