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Ideal for applications where an open flame or spark-risk is out of the question; the TD250 excels at providing 250,000 BTUs of clean, dry heat.

The patented technology uses diesel power engine to agitate hydraulic oil in flameless, sparkless, low-pressure environment. In addition, an overspeed air intake shutoff valve is standard equipment. The oil is heated and circulated, not burned, providing a clean pollution free discharge to the target environment. Safety features are incorporated to protect the investment of your Therm Dynamics heater.

All heaters are equipped with a set of four shut-off switches that terminate the engine when excessive pressures, speed or water temperatures are detected.

Certified to UL733-2013 & CSA B 140.8.1967(R2015) STANDARDS REPORT NUMBER: #0489HH001S


    • 18 years of proven performance in the harshest conditions
    • Few moving parts and intelligently designed
    • Huge, real fuel savings versus indirect fired flamed heaters. (40%)
  • SAFE
    • Flameless heat is captured from the diesel engine and a patented low pressure hydraulic fluid heat plate
    • Therm Dynamics heaters are certified to CSA/UL standards
    • Expectations are for over 12,000 hours of dependable service


    • Fuel: Diesel #2
    • Max BTU Output: 250,000
    • CFM: 2,000
    • Static Pressure: 2.25” lbs.
    • Temperature: 180 degrees F
    • Max Fuel Consumption: 2.0 GPH
    • Isuzu 3CE1 Turbo Charge 35HP
    • Width: 28”
    • Height: 45”
    • Length: 82” overall with inlet and outlet
    • Weight, empty: 1,460 lbs.
    • 52 Gallons. 42 hour run time at maximum RPM
    • 1” x 12“ or 2 x 8” ports


Our versatile, portable heaters can be used in hundreds of applications including thawing frozen ground, heating buildings or structures, curing concrete, drywall/paint drying and removing excess moisture to inhibit mold growth and any other application that requires clean, dry, flameless heat.


  • Easy access to all maintenance components and minimal operation supervision
  • Low humidity, high CFM for drying. Reduces relative humidity
  • Clean, uncontaminated air output improves working environment. No carbon monoxide poisoning risk
  • Thermostat controlled operation will improve fuel efficiency
  • Halliburton, Conoco, Exxon, Shell, BP and Anadarko currently utilize our heaters in their fleet
  • Safe, flameless heat. Eliminates all risk of fires
  • Proudly made in Tea, SD USA


Available options include custom paint, ducting, ducting storage, recirculation inlets, operational strobe light, emergency shut-down button and many more.