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Downblast Vent,Belt Drive,24-1/2 In close
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Downblast Vent, Belt Drive, 24-1/2 In

Price $2,658.00 / each

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Typically in Stock

  • Item # 7AF20
  • Mfr. Model # 7AF20
  • UNSPSC # 40101503
  • Catalog Page # 4141
  • Shipping Weight 156.85 lbs.
Country of Origin VariesCountry of Origin is subject to change.
Note: Product availability is real-time updated and adjusted continuously. The product will be reserved for you when you complete your order. More

Technical Specs

  • ItemDownblast Ventilator
  • Drive TypeBelt
  • Wheel Dia.24-1/2"
  • CFM @ 0.000-In. SP4637
  • CFM @ 0.125-In. SP4242
  • CFM @ 0.250-In. SP3761
  • CFM @ 0.375-In. SP3060
  • Sones @ 0.125-In. SP @ 5 Ft.7.5
  • Sones @ 0.250-In. SP @ 5 Ft.6.9
  • Sones @ 0.500-In. SP @ 5 Ft.6.1
  • Motor Voltage230/460
  • Phase3
  • Hz60
  • Max. Operating Amps1.2/0.6
  • Motor HP1/3
  • Max. BHP0.35
  • RPM505
  • Base Width34"
  • Base Length34"
  • Base Height1-3/4"
  • Overall Dia.42-3/4"
  • Overall Height38-3/8"
  • Shaft Dia. Wheel End1"
  • Mounting LocationRoof
  • Shaft Dia. Sheave End1"
  • Max. Inlet Temp.180 Degrees
  • Housing MaterialSpun Aluminum
  • Wheel MaterialAluminum
  • Wheel TypeBackward Inclined Centrifugal
  • Speed ControllableNo
  • Adj. 12 3/8"H Roof Curb Stock No.2ZV84
  • Adj. 6 3/8"H Roof Curb Stock No.4C455
  • Assembled/UnassembledUnassembled
  • Recommended 12 In. Fixed Curb Item No.2RB80
  • Recommended 8 In. Fixed Curb Item No.4HX42
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Compliance and Restrictions



Hazardous Location Centrifugal Belt-Drive Exhaust Ventilators

• Aluminum, backward inclined, nonoverloading centrifugal wheel design Air handling-quality bearings meet min. L10-100,000 hr.
Designed to exhaust air in commercial and industrial applications with potentially hazardous particles or fumes. Constructed with spark-resistant aluminum wheel and rub ring. Spun aluminum housing features rolled wind band to increase stability. Motor, drive frame, and wheel are isolated from the mounting base by independent neoprene studs—no metal-to-metal contact, greatly reducing overall noise. Motor compartment is cooled by fresh outside air, maximizing motor life. Motors, sheaves, belts, and conduit kit are packed separately when unassembled ventilator with drive package is ordered.
Warning: Nonhazardous location ventilators are not interchangeable with hazardous location ventilators. Note: Installation must comply with all local and national safety codes including the National Electrical Code (NEC) and National Fire Protection Act (NFPA).
Downblast Ventilators

• Motor only UL Listed for Class I Groups C & D and Class II Groups E, F, & G hazardous locations Max. inlet air temp.: 180°F Bearings—sealed pillow block up to 16-3/4" wheel dia.; regreasable pillow block for 18-1/2" wheel dia. and larger

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