Dayton
Dayton 7AX42 Downblast Exhaust Vent 13-3/4 In Trap
Centrifugal downblast exhaust ventilator moves 1866 CFM at zero static pressure with a 13-3/4 inch wheel and 1/4 HP motor for roof mounting
- TypeDrain Components
- Downblast design directs exhaust away from roof surface
- 1866 CFM free-air capacity moves large air volumes efficiently
- 1/4 HP motor operates on 115/230V single-phase power
- 5 sones at 0.250 in. SP provides moderate noise level
- Requires roof curb for proper new installation setup
Product identity
The Dayton 7AX42 is a centrifugal downblast exhaust ventilator rated for 1866 CFM at zero static pressure and 1545 CFM at .500 in. SP. It suits commercial or industrial roof installations that need a 1/4 HP single-phase motor.
Installation prerequisites
Verify the roof can accept a 19 by 19 inch base and that a compatible roof curb is available for new work. Confirm the supply matches 115/230 V at 60 Hz and that the duct layout can handle the published static-pressure curve.
Build integration
The unit mounts on the roof and includes a NEMA 1 junction box for direct wiring. Its 13-3/4 inch wheel delivers the listed airflow while the 180 °F maximum inlet temperature suits standard exhaust streams.
Highlights
- Downblast design directs exhaust away from roof surface
- 1866 CFM free-air capacity moves large air volumes efficiently
- 1/4 HP motor operates on 115/230V single-phase power
- 5 sones at 0.250 in. SP provides moderate noise level
- Requires roof curb for proper new installation setup
Specifications
| Type | Drain Components |
|---|---|
| Brand | Dayton |
| Model | 7AX42 |
Questions about this item
Does the downblast exhaust vent come with the roof curb and wiring, or must those be purchased separately?
The unit is supplied unassembled with the drive package and includes a NEMA 1 junction box. A roof curb for new installations is not included and must be bought separately.
Which motor voltage should I select for a standard 115 V supply versus a 230 V supply?
The motor is dual-rated for 115/230 V at 60 Hz single phase, so the same model works with either supply voltage.
What airflow can I expect at 0.500 in. static pressure once the ventilator is installed on the roof?
At 0.500 in. SP the ventilator delivers 1545 CFM with a sound level of 12.5 sones measured at 0.250 in. SP and 5 ft. distance.
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