HELLFIRE Gas Fired Forced Air Switch Heaters Track & Switch Heaters

Thermon Hellfire 900/905 and Hellfire 400 gas fired forced air switch heaters clear ice and snow from switches with up to 40 feet of moving rail from heel to point of switch. These snow clearing devices consist of a blower, combustion chamber, and ducting system that delivers heated air from the combustion chamber to the entire switch.

The blower is an electrically powered centrifugal fan. Air from the gas fired blower enters the combustion chamber and is used for combustion and make up air. The heated air exits the combustion chamber and is ducted below the rails to the point nozzles and track duct nozzles mounted within the switch. The air temperature is thermostatically limited for maximum snow clearing performance without burning ties or excessive softening of frozen ballast.


  • Rated input of 200,000 to 400,000, and 300,000 to 900,000 BTU/hr
  • 2, 3 and 5hp direct drive blower models
  • Multiple duct system configurations available to suit all applications
  • Voltages range from 208 to 575 VAC
  • Remote operation with user selectable continuous or timeout function
  • Optional Energy Management System (EMS)
  • Soft start option to eliminate motor in rush currents (Hellfire 905)


Rated with an output of 200,000 to 900,000 BTU/hr
Factory set to operate on propane. Field adjustable to Natural Gas by simple regulator adjustment.
Three standard duct system configurations are available: 131", 140" and 155" clearance
Fan is direct driven at 3450 rpm
Voltages range from 208 to 575 Vac
14 gauge galvanized steel body construction
Stainless steel combustion chamber and transition duct
Remote operation with user selectable continuous or timeout function
Low or high profile air intakes
Optional Energy Management System (EMS)