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Industrial Ventilation – Troubleshooting Fact Sheet

Industrial Ventilation – Troubleshooting Fact Sheet

WHAT ARE SOME TROUBLESHOOTING TIPS FOR HOODS, DUCTS, AIR-CLEANING DEVICES & FANS?

Exhaust Hood
Problems Possible Cause(s)
Low Capture Velocity
  • Hood located too far away from process or operation generating point.
  • Cross drafts or turbulence close to hood.
  • Blocked duct work.
  • Fan malfunction.
  • Increased resistance through air-cleaning equipment.
Reduced Face Velocity
  • Unauthorized enlargement of the opening of an existing hood. The face velocity at the hood will decrease resulting in the escape of contaminants held back by the original face velocity.
 
Ducts
Problems Possible Cause(s)
Constant Plugging
  • Ducts handling particulates with inadequate transport velocity (speed).
  • Flexible ducts used in place […]

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