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Rectangular steel blower housing with forward-curved wheel visible

Dayton

Dayton 45NM97 Rectangular OEM Blower 1670 RPM 1 Phase Direct Drive Steel

SKU CH-1DZN-TBB1D

Rectangular OEM blower delivers up to 271 cfm airflow at 1670 RPM with direct-drive steel construction

  • TypeTraffic & Parking Lot
  • Delivers 271 cfm at zero static pressure for strong airflow
  • Maintains 255 cfm at 0.100 in SP for reliable performance under load
  • Provides 219 cfm at 0.250 in SP to handle moderate resistance
  • Direct drive at 1670 RPM eliminates belt wear and reduces maintenance
  • Steel construction with assembled design ensures durability and quick installation

Rectangular OEM Blower 1670 RPM

The Dayton 45NM97 is a direct-drive blower built for traffic and parking-lot ventilation. It delivers forced airflow through a forward-curved wheel in a steel housing. The unit ships assembled and ready for integration into OEM equipment. Buyers who need variable-speed control or belt-driven layouts will need a different platform.

Airflow curve across static pressure

At zero static pressure the blower moves 271 cfm, falling to 255 cfm at .100 in SP and 219 cfm at .250 in SP. Output drops to 183 cfm at .400 in SP and 135 cfm at .500 in SP, with no data published for higher resistances. The curve shows a steady decline as back-pressure rises. Installers must match duct resistance to the published points or airflow will fall below expectation.

Capacity headroom for ducted exhaust

The 1670 RPM direct-drive motor sustains 271 cfm in free air, giving margin for short duct runs and light filters. At .250 in SP the 219 cfm figure still covers many hood and canopy applications. Beyond .500 in SP the 135 cfm remainder suits only minimal restriction. Systems requiring sustained flow above .500 in SP exceed this blower’s practical envelope.

Highlights

  • Delivers 271 cfm at zero static pressure for strong airflow
  • Maintains 255 cfm at 0.100 in SP for reliable performance under load
  • Provides 219 cfm at 0.250 in SP to handle moderate resistance
  • Direct drive at 1670 RPM eliminates belt wear and reduces maintenance
  • Steel construction with assembled design ensures durability and quick installation

Specifications

BrandDAYTON
TypeTraffic & Parking Lot

Questions about this item

Which airflow rating should I use when sizing this 45NM97 blower for my duct system?

Choose the static-pressure point that matches your duct resistance; at 0.000 in SP the blower moves 271 cfm, at 0.100 in SP it delivers 255 cfm, at 0.250 in SP it provides 219 cfm, at 0.400 in SP it gives 183 cfm, and at 0.500 in SP it supplies 135 cfm.

What does the 1670 RPM rating mean for actual airflow once the blower is installed?

The motor spins at 1670 RPM, but real airflow depends on system static pressure; expect 271 cfm at zero pressure dropping to 135 cfm at 0.500 in SP as resistance increases.

Does the direct-drive design limit the blower to a single speed or voltage?

Direct drive couples the wheel to the motor shaft without belts, so speed is fixed at 1670 RPM and airflow varies only with the static pressure the system presents.

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