ODCS OverDraft Control Air System The OverDraft Control Systems from US Draft Co maintains a constant negative pressure in the exhaust common manifold or individual chimney/vent. Designed with EC-Flow Technology™, the ODCS takes advantage of US Draft Co. bi-directional pressure transducer and proprietary PID technology to rapidly respond to varying manifold or individual system pressure on Category I, II, III & IV as well as building heating appliance systems. Utilizing the Opposed Blade Damper (OBD) or Single Blade Damper (SBD), a V-series control and pressure transducer, the system interlocks with fossil fuel fired heating appliances to maintain the required outlet pressure of the manufacturer.

OBD Opposed Blade Damper

Control Options

V150 Constant Pressure Controller
  • - Up to 2 Appliances
  • - Up to 2 Applications
  • - True bi-directional (+/- 1.0" wc)
  • - 4-button LCD screen
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V200 Constant Pressure Controller
  • - Up to 4 Appliances
  • - Up to 2 Applications
  • - True bi-directional (+/- 1.0" wc)
  • - 4-button LCD screen
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V250 Constant Pressure Controller
  • - Up to 6 Appliances
  • - Up to 2 Applications
  • - True bi-directional (+/- 1.0" wc)
  • - 4" Color Touchscreen
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V300 Constant Pressure Controller
  • - Up to 4 Appliances
  • - Up to 3 Applications
  • - True bi-directional (+/- 1.0" wc)
  • - 7" Color Touchscreen
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V350 Constant Pressure Controller
  • - Up to 15 Appliances
  • - Up to 3 Applications
  • - True bi-directional (+/- 1.0" wc)
  • - 7" Color Touchscreen
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AX42 Constant Speed Controller
  • - Up to 4 Appliances
  • - Up to 2 Applications
  • - Fixed speed
  • - On-board potentiometer
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