Dayton 2RB53


Roof Vent, 3 Spd, 115 V, CFM 398/493/588

2RB53 385012
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ItemExhaust Ventilator
TypeCentrifugal, Direct Drive Downblast, 3 Speed
Wheel Dia. (In.)8-1/4
CFM @ 0.000-In. SP398/493/588
CFM @ 0.125-In. SP307/420/528
CFM @ 0.250-In. SP179/340/464
CFM @ 0.375-In. SP-/233/394
CFM @ 0.500-In. SP-/-/308
CFM @ 0.625-In. SP-/-/168
Sones @ 0.125-In. SP @ 5 Ft.7.4/5.3/3.9
Sones @ 0.250-In. SP @ 5 Ft.4.3/5.3/7.4
Motor Voltage115
Max. Operating Amps1.25/1.54/1.89
Motor HP1/20
Max. BHP0.06
Base Width (In.)19
Base Length (In.)19
Base Height (In.)1-3/4
Overall Dia. (In.)21-3/4
Overall Height (In.)16-3/8
Shaft Dia. Wheel End (In.)1/2
Mounting LocationRoof
Max. Inlet Temp. (Deg. F)130
Housing MaterialSpun Aluminum
Wheel MaterialAluminum
Wheel TypeBackward Incline
Speed Control1DGV1
Speed ControllableYes
Agency ComplianceUL/cUL 705
RequiresRoof Curb For New Installations
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.2RB75
Recommended 8 In. Fixed Curb Item No.4HX38
Recommended Damper Size (In.)9-1/2 x 9-1/2
Recommended Damper Stock No.3TZ50
Weight 23.200000


Exhaust Ventilator, Centrifugal, Direct Drive Downblast, 3 Speed, Wheel Dia 8 1/4 In, CFM @ 0.000-In SP 398/493/588, @ 0.250-In SP 179/340/464, 4.3/5.3/7.4 Sones @ 0.250-In SP, Motor Voltage 115, 1 Phase, Motor 1/20 HP, Base Width 19 In, Base Length 19 In, Roof Mounting Location, Max Inlet Temp 130 Deg F, Housing Material Spun Aluminum, Speed Controllable, Includes NEMA 1 Junction Box

  • Note: 8" models cannot be used with dampers or shutters.

Centrifugal Direct-Drive Downblast Exhaust Ventilators
  • 3-Speed
  • Ventilators feature 3 specific RPM motors and are fully controllable on any selected speed. Speed control allows for 30% useable turndown.
  • For use in general clean air environments Aluminum backward-inclined, nonoverloading centrifugal wheel design Fully rolled windband bead for increased stability Motor compartment is isolated from the air stream and is cooled by outside air NEMA 1 junction box located in motor enclosure Max. inlet air temp.: 130 F UL-705 Listed for Power Ventilators

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