Skip Content

Upblast Vent, 30-1/2 In,208-230/460V 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.
How can we improve our Product Images?

Upblast Vent, 30-1/2 In, 208-230/460V

Price $3,997.00 / each

Please sign in or register to access lists

Confirm ZIP Code to determine availability.


Invalid Zip Code


Ship to: (Change)


Invalid Zip Code

Required Accessories

View More Required Accessories
  • Item # 3GY74
  • Mfr. Model # 3GY74
  • UNSPSC # 40101502
  • Catalog Page # 4136
  • Shipping Weight 357.0 lbs.
Country of Origin USACountry 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

  • ItemUpblast Ventilator
  • Drive TypeBelt
  • Wheel Dia.30-1/2"
  • CFM @ 0.000-In. SP12,449
  • CFM @ 0.125-In. SP12,176
  • CFM @ 0.250-In. SP11,904
  • CFM @ 0.375-In. SP11,607
  • CFM @ 0.500-In. SP11,273
  • CFM @ 0.625-In. SP10,939
  • CFM @ 0.750-In. SP10,554
  • CFM @ 0.875-In. SP10,169
  • CFM @ 1.000-In. SP9743
  • CFM @ 1.250-In. SP8756
  • CFM @ 1.500-In. SP7352
  • Sones @ 0.125-In. SP @ 5 Ft.24
  • Sones @ 0.250-In. SP @ 5 Ft.23
  • Sones @ 0.500-In. SP @ 5 Ft.22
  • AssembledYes
  • Motor Voltage208-230/460
  • Phase3
  • Hz60
  • Max. Operating Amps9.3/4.0
  • Motor HP3
  • Max. BHP3.15
  • RPM765
  • Base Length42"
  • Base Height1-3/4"
  • Overall Dia.50"
  • Base Width42"
  • Shaft Dia. Sheave End1"
  • Shaft Dia. Wheel End1"
  • Overall Height40"
  • Max. Inlet Temp.300 Degrees
  • Housing MaterialSpun Aluminum
  • Mounting LocationRoof
  • Wheel MaterialAluminum
  • Speed ControllableNo
  • Fixed UL 762 Kitchen Roof Curb Stock No.4HX59
  • Recommended 12 In. Fixed Curb Item No.2RB81
  • Recommended 8 In. Fixed Curb Item No.4HX43
  • Recommended Damper Size (In.)35 x 35
  • Recommended Damper Stock No.4HX69
  • Adj. 12 3/8"H Roof Curb Stock No.2ZV85
  • Adj. 6 3/8"H Roof Curb Stock No.4C455
  • Adj. UL 762 Kitchen Roof Curb Stock No.4HX63
  • RequiresRoof Curb For New Installation
  • IncludesNEMA 1 Junction Box
  • StandardsUL/cUL 762, AMCA Sound and Air
  • Green Environmental AttributeProduct Contributes to Reducing Energy Consumption
  • Green Certification or Other RecognitionNEMA Premium Rated

Compliance and Restrictions

  • Green Product - This item has been designated by the manufacturer as an environmentally preferable product (EPP) because this item is NEMA Premium Rated.

Repair Parts

Displaying repair parts for model:
  • 3GY74

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.