Usage descriptions:
Backward inclined blowers are most commonly used when ducts are required to extract unwanted air or fumes. Suitable for modestly contaminated air. Common applications include:

• Welding fume extraction or exhaust
  
• General fume hood exhaust
  
• Other various manufacturing processes
  
• Grease laden cooking vapors
  
• Bathroom area exhaust
  
• Vapor removal from tanks or vessels
  
• Ducted supply air