Skip Content

Downblast Vent,Belt Drive,30-1/2 In close
close x

Using 360° Viewing:

  1. Rotate: Use top-to-bottom, side-to-side by use of mouse arrow.
  2. Zoom In: Double click on image.
  3. Zoom Out/Reset: Put photo at full zoom & then double click.
Megaphone How can we improve our Product Images?

Downblast Vent, Belt Drive, 30-1/2 In

Price $3,169.00 / each

Activate Now

to save with

Select AdvantageSM

Please sign in or register to access lists

Confirm ZIP Code to determine availability.


Invalid Zip Code


Ship to: (Change)


Invalid Zip Code

  • Item # 7AF05
  • Mfr. Model # 7AF05
  • UNSPSC # 40101503
  • Catalog Page # 4141
  • Shipping Weight 280.91 lbs.
Country of Origin Varies Country 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

  • Item Downblast Ventilator
  • Drive Type Belt
  • Wheel Dia. 30-1/2"
  • CFM @ 0.000-In. SP 7694
  • CFM @ 0.125-In. SP 7197
  • CFM @ 0.250-In. SP 6616
  • CFM @ 0.375-In. SP 5955
  • CFM @ 0.500-In. SP 5095
  • Sones @ 0.125-In. SP @ 5 Ft. 10.6
  • Sones @ 0.250-In. SP @ 5 Ft. 9.6
  • Sones @ 0.500-In. SP @ 5 Ft. 8.1
  • Motor Voltage 115/208-230
  • Phase 1
  • Hz 60
  • Max. Operating Amps 11.0/5.4-5.5
  • Motor HP 3/4
  • Max. BHP 0.77
  • RPM 475
  • Base Width 42"
  • Base Length 42"
  • Base Height 1-3/4"
  • Overall Dia. 50"
  • Overall Height 36"
  • Shaft Dia. Wheel End 1"
  • Max. Inlet Temp. 180 Degrees
  • Mounting Location Roof
  • Housing Material Spun Aluminum
  • Wheel Material Aluminum
  • Wheel Type Backward Inclined Centrifugal
  • Speed Controllable No
  • Adj. 12 3/8"H Roof Curb Stock No. 2ZV84
  • Adj. 6 3/8"H Roof Curb Stock No. 4C455
  • Assembled/Unassembled Unassembled
  • Recommended 12 In. Fixed Curb Item No. 2RB81
  • Recommended 8 In. Fixed Curb Item No. 4HX43
  • Agency Compliance UL/cUL 705
Megaphone How can we improve our Technical Specifications?

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

Alternate Products

Product Reviews Disclaimer:
Grainger is neither responsible for, nor does it endorse, the content of any product review or statement posted. Any statements posted constitute the statements of the poster and are not the statements of Grainger. The statements posted by Grainger employees with the Grainger employee badge represent the views of such employees and are not the statements of Grainger. Grainger makes no representations as to the appropriateness, accuracy, completeness, correctness, currentness, suitability, or validity of any product review or statements posted, including those posted by employees with the Grainger employee badge, and is not liable for any losses, injuries or damages which may result from any such product review or statements. Use of any linked web site provided in a product review or post is at the user's own risk.