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Square steel blower with forward-curved wheel, direct drive, assembled

Dayton

Dayton 70213483JS Square OEM Blower 3020 RPM

SKU CH-J8HQ-EWSEZ

A direct-drive blower delivering 140 cfm at zero static pressure with airflow ratings of 136, 121, 119 and 110 cfm at increasing resistance

  • typeHigh Temperature
  • Delivers 140 cfm at zero static pressure
  • Maintains 136 cfm at 0.100 in SP for real-world airflow
  • Provides 121 cfm at 0.250 in SP under moderate resistance
  • Direct-drive design eliminates belt maintenance and reduces vibration
  • 3020 RPM operation balances air movement with lower noise

Square OEM Blower for HVAC Systems

This Dayton 70213483JS is a direct-drive forward-curved blower designed for original-equipment integration in air-handling units. It arrives assembled and operates on single-phase power at a fixed 3020 RPM, supplying 140 cfm at free delivery for installers needing a compact, ready-to-mount air mover.

Airflow Retention Under Rising Static Pressure

Output declines gradually as resistance increases, delivering 136 cfm at 0.100 in SP, 121 cfm at 0.250 in SP, 119 cfm at 0.400 in SP and 110 cfm at 0.500 in SP. The curve shows the wheel maintains usable volume through moderate duct restriction, making it suitable for systems where filter loading or coil pressure drop varies over time.

Steel Housing With Direct-Drive Simplicity

The steel wheel and housing resist deformation in high-temperature airstreams, and the direct-drive package eliminates belts, pulleys and bearing alignments that require periodic service. Because no inlet flange or mounting pattern dimensions are provided, installers must verify fit against the existing cabinet opening before ordering.

Highlights

  • Delivers 140 cfm at zero static pressure
  • Maintains 136 cfm at 0.100 in SP for real-world airflow
  • Provides 121 cfm at 0.250 in SP under moderate resistance
  • Direct-drive design eliminates belt maintenance and reduces vibration
  • 3020 RPM operation balances air movement with lower noise

Specifications

BrandDayton
typeHigh Temperature

Questions about this item

How much heat does the 3020 RPM motor generate during continuous operation?

The direct-drive motor runs at 3020 RPM; continuous heat output depends on the static pressure load and enclosure ventilation.

What mounting hardware or ducting is required to install the 3 3/4 in wheel blower?

The assembled unit includes the drive package; you need a square mounting frame and duct connections that match the wheel diameter.

Will the forward-curved wheel maintain airflow when paired with an older filter box at 0.250 in SP?

At 0.250 in SP the blower delivers 121 cfm, so it can sustain flow through a legacy filter box at that resistance.

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