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DT 300


DTR 500

The DT drum and tube duct heater has been mainstay on the HVAC market for over 40 years. With its proven track record, it is especially suited to industrial applications demanding reliability and durability. It is certified for both indoor and outdoor installation and features an extended list of options for commercial-to-heavy-duty applications.

The DT is a listed component and the DTR is a recognized component
for installation in the US and Canada.
Intertek ETL Listed C US 



  • Four-pass heat exchanger
  • 409 HP stainless steel heat exchanger
  • Free-floating design
  • Drain for condensate removal
  • G90 galvanized steel cabinet and 2" high-temperature insulation
  • Welded steel frame with removable lifting lugs


  • Thermal efficiency: 80% minimum
  • Twenty sizes from 200 to 5 000 MBH output
  • Airflow capacity: 1 540 to 92 600 CFM
  • Turndown ratios: 10:1 to 40:1

Optional Features

  • FM or IRI gas train available
  • 304 SS or 316 SS heat exchanger
  • Heavy duty NEMA 4 and 12
  • Stainless steel cabinet
  • Variable air-volume controller
  • Epoxy or enamel paint
  • Gas train and control enclosure
  • Weatherproof construction
  • Heated control box
  • Sealtight wiring
  • Natural or propane gas
  • Oil-fired burner with 3:1 turndown
  • Separated combustion


  • Fresh air compensation
  • Industrial and commercial warm air heating systems
  • Low temperature industrial processes


alt The heat exchanger is a four-pass drum and tube type with the choice of 409 HP, 304L or 316L stainless steel. Efficiency is at least 80% and can be up to 90% at low fire.
The DT series is now available with a modulating oil burner with precalibrated ratio control valves and pump. Efficiency of this burner/heat exchanger combination can be as high as 90%. alt
alt Our DT series gas power burner has a proven track record of excellent flame characteristics while also being reliable and robust enough for commercial and industrial applications.

Available in stainless steel.
The DT is available with customized combustion air intake for separated combustion applications. alt