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Aluminium roof exhaust fan, 12 inch blades, assembled unit 29 inches long, 18.3 high, 28.6 wide

Dayton

Dayton 4YC88 Axial Roof Exhaust Fan 12 in Blade 115V 1/4 hp 556 cfm

SKU CH-Z6Q2-1WS90 MPN 4YC88

12-inch aluminium roof exhaust fan delivers 556 cfm airflow at 115 V for low-static-pressure ventilation

  • TypeDrain Components
  • 12-inch blade moves 556 cfm for strong roof exhaust
  • 1/4 hp motor runs on standard 115V single-phase power
  • Aluminium housing resists corrosion in outdoor roof mounting
  • Assembled unit fits 29-inch length with 18.3-inch height
  • Rated for inlet air up to 120°F in continuous operation

Roof Exhaust Fan 12 in Blade

The Dayton 4YC88 is an axial downblast roof exhaust fan designed for mounted roof installation. It arrives fully assembled with an aluminium housing and a 12 in blade diameter driven by a 1/4 hp open air over motor. The unit operates on 115V AC single phase power at a single speed.

Thermals Noise and Power Draw

The motor runs on 115V AC with a 1/4 hp rating and is not classified as high efficiency. Maximum inlet air temperature is rated at 120 Degrees F, setting the thermal limit for incoming air. No sound level or power consumption figures are provided in the specifications.

Airflow 556 cfm at Zero Static Pressure

At 0.000 in wc static pressure the fan delivers 556 cfm for both exhaust and supply airflow. Maximum static pressure capability is 7/8 in wc, and the unit is not rated for high static pressure applications. This airflow figure determines whether the fan meets the ventilation requirement.

Highlights

  • 12-inch blade moves 556 cfm for strong roof exhaust
  • 1/4 hp motor runs on standard 115V single-phase power
  • Aluminium housing resists corrosion in outdoor roof mounting
  • Assembled unit fits 29-inch length with 18.3-inch height
  • Rated for inlet air up to 120°F in continuous operation

Specifications

TypeDrain Components
BrandDayton
Model4YC88

Questions about this item

How do I mount the 12 in blade assembly on the 29 in long aluminum housing, and what step do installers often miss?

Secure the pre-assembled unit to the roof curb using the integral mounting flange, then wire the 115V single-phase motor to a dedicated circuit; the step often missed is verifying the damper opens freely before final tightening.

What maintenance will the open air-over motor and aluminum blades need after extended operation?

Inspect the motor bearings and blade surfaces annually; clean dust buildup from the four blades and check that the 1/4 hp motor spins freely without unusual noise.

At what static pressure does the 556 cfm airflow begin to drop off during continuous high-temperature exhaust?

Performance declines once static pressure exceeds 7/8 in wc, and the 120°F maximum inlet temperature limit is reached before the motor thermal protection activates.

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