Skip Content

14" Direct Drive Axial Exhaust Ventilator, Motor HP 1/2, Voltage 115 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?

14" Direct Drive Axial Exhaust Ventilator, Motor HP 1/2, Voltage 115

Price $926.50 / 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 # 4YC90
  • Mfr. Model # 4YC90
  • UNSPSC # 40101502
  • Catalog Page # 4145
  • Shipping Weight 51.0 lbs.
Country of Origin USA 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 Direct Drive Axial Exhaust Ventilator
  • Propeller Dia. 14"
  • CFM @ 0.000-In. SP 2457
  • CFM @ 0.125-In. SP 2298
  • CFM @ 0.250-In. SP 2093
  • CFM @ 0.375-In. SP 1875
  • CFM @ 0.500-In. SP 1603
  • CFM @ 0.625-In. SP 1381
  • CFM @ 0.750-In. SP 1244
  • CFM @ 0.875-In. SP 984
  • CFM @ 1.000-In. SP 716
  • Sones @ 0.125-In. SP @ 5 Ft. 16.3
  • Sones @ 0.250-In. SP @ 5 Ft. 16.2
  • Voltage 115
  • Hz 60
  • Phase 1
  • Max. Operating Amps 4.4
  • Max. Operating Watts 380
  • Motor HP 1/2
  • Max. BHP 0.41
  • RPM 1750
  • Max. Inlet Temp. 120 Degrees F
  • Base Width 22"
  • Base Length 22"
  • Base Height 1-3/4"
  • Base Top to Shroud 6-1/4"
  • Overall Height 16 1/2"
  • Overall Dia. 28 5/8"
  • Mounting Location Roof
  • Housing Material Spun Aluminum
  • Propeller Material Aluminum
  • Shaft Dia. Propeller End 1/2"
  • Speed Control 48C173
  • Speed Controllable Yes
  • Standards AMCA Sound & Air, UL/cUL 705
  • Requires Roof Curb For New Installation
  • Includes NEMA 1 Junction Box
  • Adj. 12 3/8"H Roof Curb Stock No. 2ZV82
  • Adj. 6 3/8"H Roof Curb Stock No. 4C453
  • Recommended 12 In. Fixed Curb Item No. 2RB76
  • Recommended 8 In. Fixed Curb Item No. 4HX39
  • Recommended Damper Size 15" x 15"
  • Recommended Damper Stock No. 4HX65
Megaphone How can we improve our Technical Specifications?

Compliance and Restrictions



Dayton ventilators are designed for situations requiring the steady exhaust or supply of air under low to moderate static pressures. Features include a fully rolled baffle bead for stability and ease of transport with spun aluminum hood construction. Galvanized venturi, inlet and supports. The NEMA 1 junction box is located in motor enclosure, inlet can handle temperatures up to 120ºF, and all units are UL/cUL listed Standard 705.

Product availability based on selecting either shipping or pick up and a location. Dismiss

Repair Parts

Displaying repair parts for model:
  • 4YC90G

Alternate Products

Rated 3 out of 5 by 2reviewers.
Rated 5 out of 5 by This product worked as discribed and was exactly as we needed April 20, 2015
Rated 1 out of 5 by Good Product when it works correctly however when you have to disassemble after its installed to rewire the factory wired motor so it goes the correct direction as the manufacturer indicates then all it does is cost you money especially when the job is quoted. August 22, 2014
  • 2015-11-27 T19:11:41.958-06:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_2, tr_2
  • loc_en_US, sid_4YC90, prod, sort_default
1-2 of 2

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.