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Cylindrical galvanized steel inline duct fan, 10 inch diameter, 15 inch length, external junction box

Tjernlund Products, Inc.

Tjernlund Products, Inc. Axial Duct Booster 15-1/2 In. L Sleeve

SKU CH-29C2-Z6A8Q

An in-line axial duct booster moves 475 cfm through 10-inch duct at 500 rpm with a 7.5 W motor

  • weight9.3
  • typeAxial, In-line
  • materialHAWA
  • Delivers 475 cfm airflow at zero static pressure
  • 10 in duct diameter fits standard residential ductwork
  • 120 V AC single-phase power suits household wiring
  • 150 °F max inlet temperature handles warm-air applications
  • External junction box simplifies electrical connections

Axial Duct Booster for 10 in Ducts

The Tjernlund axial duct booster is an in-line fan built for 10 in round ductwork. It moves 475 cfm at zero static pressure using a 7.5 W motor that runs on 120V AC single-phase power. The galvanized steel housing measures 15-1/2 in long and fits directly inside the duct run. It is suited for installers who need a simple airflow boost in residential or light-commercial systems.

Replaces weak register boosters or missing duct flow

This unit upgrades from register-mounted booster fans that cannot overcome duct friction. The jump is worth it when the main blower cannot push enough air through long or restrictive runs to reach distant rooms. It is not for buyers who need variable-speed control or integrated temperature sensors. It is not for systems that require high-static-pressure fans for filtration or heat-recovery cores.

Slips into 10 in duct with external junction box

Installation consists of cutting the duct, sliding the 15-1/2 in sleeve in place, and securing it with sheet-metal screws or tape. The external junction box allows wiring connections without opening the fan housing. The motor is rated for inlet air up to 150°F. Common issues include vibration if the duct is not rigidly supported and noise transmission when the fan is mounted near living spaces.

Highlights

  • Delivers 475 cfm airflow at zero static pressure
  • 10 in duct diameter fits standard residential ductwork
  • 120 V AC single-phase power suits household wiring
  • 150 °F max inlet temperature handles warm-air applications
  • External junction box simplifies electrical connections

Specifications

BrandTjernlund
weight9.3
typeAxial, In-line
materialHAWA

Questions about this item

What duct diameter does the 10 in overall diameter booster fit?

It fits a 10 in duct and measures 15 3/4 in overall height with a 10 in overall width.

How is the booster wired during installation?

An external junction box is included for wiring to the 120V AC single-phase supply.

What is the maximum inlet air temperature the motor can handle?

The motor is rated for a maximum inlet air temperature of 150 degrees F.

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