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Dayton 2RB59 belt drive downblast vent trap 11 in square base 19 in assembled

Dayton

Dayton 2RB59 11 in Belt Drive Downblast Vent Trap

SKU CH-TWVH-98HA9 MPN 2RB59

Belt-driven downblast roof exhaust fan with an 11 in wheel delivering 373 cfm at zero static pressure

  • TypeDrain Components
  • 11 in wheel diameter for targeted airflow
  • Belt-drive assembly reduces direct motor vibration
  • 1/4 hp motor delivers 373 cfm at .000 in SP
  • 115/208-230 V single-phase suits common supplies
  • Square 19 in base simplifies roof mounting

Belt-Drive Centrifugal Roof Fan

This centrifugal downblast roof exhaust fan uses a belt-drive assembly with an 11 in wheel diameter. It operates on single-phase 115/208-230V AC power with a 1/4 hp motor and includes the drive package. The square base measures 19 in by 19 in for roof mounting.

Clean-air low-static installations

The unit is rated for clean air and delivers 373 cfm at .000 in static pressure with a maximum of 1 in wc. It is not designed for high-static pressure applications and does not feature a high-efficiency motor. Buyers needing higher static capability or contaminated-air handling should look elsewhere.

1/4 hp motor at 115/208-230V single phase

This nameplate voltage and horsepower combination determines whether the fan matches the available electrical supply and the required airflow duty. Verify the circuit can provide the correct voltage and phase before purchase.

Highlights

  • 11 in wheel diameter for targeted airflow
  • Belt-drive assembly reduces direct motor vibration
  • 1/4 hp motor delivers 373 cfm at .000 in SP
  • 115/208-230 V single-phase suits common supplies
  • Square 19 in base simplifies roof mounting

Specifications

TypeDrain Components
BrandDayton
Model2RB59

Questions about this item

What roof curb size fits the 19 in square base of the Dayton 2RB59?

The fan base measures 19 in by 19 in square, so select a matching 19 in square roof curb for proper mounting.

How is the belt tension set on the 1/4 hp motor, and what step is often missed?

After securing the motor, adjust the belt so it deflects about 1/2 in under thumb pressure, then re-tighten the motor bolts — skipping the re-check after the first run is the common error.

When should the belt on the 11 in wheel assembly be replaced?

Inspect the belt every six months; replace it when you see cracks, fraying, or glazing, or if the fan fails to reach the rated 373 cfm airflow.

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