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Heaters / Indirect Air Heaters | Heat Exchangers

VariMax™ OTH (Once-Through Heater)

The VariMax™ OTH (Once-Through Heater) is a high efficiency, industrial, indirect-fired gas heater used to heat process air streams without contaminating the air with the products of combustion. The OTH is well-suited for recirculating ovens, dryers, makeup-air applications in cold environments, and industrial processes with moderate temperature rises.

  • Product information

  • Service and upgrades

  • Downloads

  • 80% min effectiveness
  • Up to 150°F rise
  • Up to 600°F discharge
  • Flanged for duct mounting
  • Optional gas train & control packages
  • Complete heater box supply
  • Complete heating packages available, including filters, dampers, fans and duct sections
  • Available in 6 pre-designed sizes: 500 MBTU - 3,500 MBTU
  • Designed to use on Maxon OvenPak burners
  • .2% maximum leakage
  • Product information
    • 80% min effectiveness
    • Up to 150°F rise
    • Up to 600°F discharge
    • Flanged for duct mounting
    • Optional gas train & control packages
    • Complete heater box supply
    • Complete heating packages available, including filters, dampers, fans and duct sections
    • Available in 6 pre-designed sizes: 500 MBTU - 3,500 MBTU
    • Designed to use on Maxon OvenPak burners
    • .2% maximum leakage
  • Service and upgrades
  • Downloads

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