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Dayton downblast exhaust vent, silver metal housing, 16-3/4 inch wheel, roof mount base

Dayton

Dayton 7AX57 Downblast Exhaust Vent 16-3/4 In

SKU CH-5QYT-KCA0Z MPN 7AX57

Centrifugal downblast exhaust ventilator with 16-3/4 inch wheel delivers 3692 CFM at 0.000-In. SP and 3149 CFM at 0.500-In. SP

  • TypeDrain Components
  • Moves 3692 CFM at zero static pressure
  • Delivers 3149 CFM at 0.500 in. static pressure
  • Operates at 17.0 sones measured at 0.250 in. SP
  • Handles inlet air up to 180 °F
  • Runs on 115/230 V single-phase power

Downblast Exhaust Ventilator

The Dayton 7AX57 is a standard-duty centrifugal downblast exhaust ventilator designed for roof mounting. It operates on 115/230 V single-phase power at 60 Hz with a 3/4 HP motor and includes a NEMA 1 junction box. The unit ships unassembled with a drive package and requires a roof curb for new installations. Base dimensions are 22 by 22 inches with a 16-3/4 inch wheel diameter.

Suitability and Limitations

This ventilator suits facilities needing roof-mounted exhaust with airflow up to 3692 CFM at zero static pressure and 3149 CFM at .500 inches SP. It is not for buyers who need a fully assembled unit ready to install without a roof curb. It is not for applications exceeding a maximum inlet temperature of 180 degrees Fahrenheit. It is not for installations requiring three-phase power or voltages other than 115/230 V.

Critical Specification

The wheel diameter of 16-3/4 inches determines the ventilator's airflow capacity and physical fit on the roof curb. At .250 inches SP measured at 5 feet, the unit produces 17.0 sones. Verify that the roof curb matches the 22-inch square base and that the motor voltage aligns with the available supply before purchase.

Highlights

  • Moves 3692 CFM at zero static pressure
  • Delivers 3149 CFM at 0.500 in. static pressure
  • Operates at 17.0 sones measured at 0.250 in. SP
  • Handles inlet air up to 180 °F
  • Runs on 115/230 V single-phase power

Specifications

TypeDrain Components
BrandDayton
Model7AX57

Questions about this item

What components arrive in the box and what extra parts are needed for a new roof installation?

The unit ships unassembled with the drive package and a NEMA 1 junction box included; a roof curb must be purchased separately for new installations.

How do I choose between the 115 V and 230 V motor options listed for this ventilator?

Select the voltage that matches your building supply; the motor is rated for 115/230 V, 60 Hz, single phase, 3/4 HP.

What does the 3692 CFM at 0.000-In. SP mean for actual airflow once the fan is mounted on the roof?

That figure is the free-air delivery; with 0.500-In. static pressure the output drops to 3149 CFM, and the unit produces 17.0 sones at 0.250-In. SP measured at 5 ft.

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