Trailer Heating Units

Heat King 450 MAX

Heat King® 450 Series

Dependable freeze protection for temperature-sensitive cargo. With 50,000 BTUs, the Heat King is the highest capacity transport heater available in the market today. Heat King delivers maximum uptime, ease of maintenance and long-term reliability with its heavy duty, rugged and simple design.

Product Features


  • Extra capacity available for longer thin-walled trailers
  • Powerful airflow circulates throughout the entire cargo
  • DOT-approved for transport of flammable liquids and gases
  • High and low speeds for optimal fuel economy
  • EPA Tier IV compliant


The Heat King 450 MAX utilizes an exhaust heat exchanger that extracts even more heat from the engine, allowing the unit to become 70% efficient in the transfer of energy from diesel fuel to heat. This design produces 33% more heat capacity and transfers heat more efficiently than the closest competitor product. 


Freeze-sensitive cargo will stay warm, no matter how cold it gets outside. 

  • Beverages
  • Paints, chemicals and adhesives
  • Pharmaceuticals and cosmetics 
  • Flowers and plants
  • Electronics
  • Building materials

Thermoguard® VII Features

Heat King freeze Protection shipping cargo

Integrated cycle-sentry feature ensures optimal fuel economy and the battery voltage monitor ensures batteries are charged

  • Operational data and alarm codes are automatically logged and can be downloaded via USB
  • Flash loadable programming and diagnostics through PC monitor USB interface
  • Optional status light
  • Compact design for mounting directly to or recessed into the trailer
  • Includes on/off switch, hour meter and display
  • Alarm codes are easily accessed through TGVII display and PC monitor USB interface

Heat King 450 MAX Solar Panel

Solar Benefits on a Heat King

Heaters sit all summer and likely were not fully charged at the end of last season. Adding ThermoLite® 40W solar panels to your Heat King offers:

  • Increased battery life: Keeping batteries charged all year round will negate failure from extended periods of low charge levels and proliferation of sulfation
  • Fuel savings: Reduces load on the engine with alternator working less and reduced cycle-sentry operation
  • Extended component life: Run time is reduced, alternator offloading and reduced starter engagement
  • Improved employee efficiency: Cuts time spent managing low battery alarms and battery breakdowns

Photo of a Heat King unit on a semi trailer.

An extensive portfolio for cold chain transportation

Our trailer portfolio is the culmination of decades of product innovations designed to help enhance fleet efficiencies. Whether you haul cargo that requires refrigeration or needs to be kept from freezing in cold weather, we have the solution for any application.

Have questions? Contact us and we'll connect you with an expert!

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