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Item Details - 4YU91

DaytonAxial Belt-Drive Downblast Exhaust Ventilator

Designed for situations that require steady exhaust of clean air under low-to-moderate static pressures. Spun aluminum construction including a fully rolled bead on the windband, ensures stability and provides rigidity for lifting and transporting. Select unit with drive package.

  • Maximum inlet air temperature: 120º F
  • NEMA 1 junction box located in motor enclosure
  • Optional NEMA 1 and 4 disconnects available
  • Regreaseable pillow block bearings
  • UL/cUL 705 Listed for Power Ventilators
  • Air handling quality bearings meet minimum of L10-100,000 hours

Agency Compliance

Performance

Motor HPMax BHPFan RPMCFM @
0.000'' SP0.125'' SP0.250'' SP0.375'' SP0.500'' SP0.625'' SP0.750'' SP
3/4
0.79
493
CFM
Sones
1
1.06
542
CFM
Sones
1 1/2
1.57
621
CFM
Sones
0.000'' SP0.125'' SP0.250'' SP0.375'' SP0.500'' SP0.625'' SP0.750'' SP
82617052572943982580——
———————
908279726861556944052640—
———————
10,406942585027424631652993733
———————
Agency Compliance

Dayton Electric Mfg. Co. certifies that the ventilators shown herein are licensed to bear the AMCA seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and comply with the requirements of the AMCA Certified Ratings Program.

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings include the effects of a birdscreen in the airstream.

Catalog 405, January 2010

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Product Specifications (Glossary)

Agency Compliance [?]
  • AMCA Air
  • UL/cUL 705
Assembled [?]FALSE
Base Height [?]1 3/4 in
Bearing Type [?]Regreaseable Pillow Block
CFM [?]2,580 to 10,406 ft3/min
Curb Cap Size [?]46 in
Damper Width x Damper Height [?]39 x 39 in
Drive Package Description [?]Drives By Others
Drive Type [?]Belt Drive
Fan DescriptionExhaust Fan
Height [?]41 7/8 in
Horsepower [?] 3/4 to 1 1/2 hp
Housing Material [?]Spun Aluminum
Impeller Diameter (Nom.) [?]36 in
Impeller Material [?]Steel
Impeller Type [?]Propeller
Includes [?]NEMA 1 Junction Box
Max Inlet Temp [?]120 °F
Model DescriptionAxial Belt-Drive Downblast Exhaust Ventilator
Mounting Location [?]Roof
Number of Blades [?]5
Overall Diameter [?]58 5/8 in
Recommended Damper Size39 x 39
Required Accessory [?]Roof Curb For New Installation
Roof Opening Width x Roof Opening Length [?]41 1/2 x 41 1/2 in
Shaft Diameter [?]1 1/4 in
Speed Controllable [?]No
TypeAxial Belt-Drive Downblast, Less Drive Package
Warranty Length [?]1 Year

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