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Galvanized steel axial duct booster fan cylindrical housing external junction box

Tjernlund Products, Inc.

Tjernlund Products, Inc. Axial Duct Booster Galvanized Steel Ceiling Fan

SKU CH-JW35-MS45G

In-line duct booster delivers 325 cfm airflow at 0.000 in SP through 8 in galvanised steel housing with 18.6 W motor running on 120V AC single-phase power

  • weight4.45
  • typeAxial, In-line
  • materialHAWA
  • Delivers 325 cfm airflow at .000 in SP for stronger duct circulation
  • 6 W motor runs on standard 120V AC single-phase power
  • Galvanized steel housing resists corrosion in general-purpose installations
  • External junction box included for simpler wiring connections
  • Rated for inlet air temperatures up to 150 degrees F

Axial Duct Booster for Inline Ventilation

This Tjernlund axial duct booster is built for inline installation in 8-inch round ductwork. It suits homeowners or contractors who need to increase airflow through a straight duct run. The galvanized steel housing resists corrosion in typical indoor environments. It is not for buyers who need variable speed control or high-static-pressure performance.

Fixed-Speed Operation at Standard Voltage

The single-speed motor runs on 120V AC power at 3,000 RPM and draws 18.6 W. Airflow is rated at 325 cfm at 0.000 in static pressure, so output drops as duct resistance rises. The maximum inlet air temperature is 150 degrees F, limiting use in high-heat exhaust streams. The motor carries no IP rating and is not classified as high-efficiency.

Simple Wiring with Included Junction Box

An external junction box is included to simplify electrical connections during installation. The unit weighs 4.45 units and measures 8 inches in overall diameter, height and width. Installers must ensure the duct is properly supported because the fan housing is not designed to carry structural loads. No speed controller or mounting hardware is supplied.

Highlights

  • Delivers 325 cfm airflow at .000 in SP for stronger duct circulation
  • 6 W motor runs on standard 120V AC single-phase power
  • Galvanized steel housing resists corrosion in general-purpose installations
  • External junction box included for simpler wiring connections
  • Rated for inlet air temperatures up to 150 degrees F

Specifications

BrandTjernlund
weight4.45
typeAxial, In-line
materialHAWA

Questions about this item

Should I choose the 325 cfm version or a different capacity for my 8 in duct?

This unit delivers 325 cfm at 0.000 in SP and is built for an 8 in duct diameter, matching the stated airflow to the duct size.

What does the 325 cfm rating mean once the fan is installed in my ductwork?

At zero static pressure the fan moves 325 cfm; real-world airflow will be lower once duct length, bends and filters add resistance.

How does the 120V AC single-phase supply limit the fan's performance?

The motor draws 18.6 W at 120 V AC single-phase, runs at a fixed 3,000 RPM single speed, and is rated for inlet air up to 150 °F.

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