Tjernlund 75 CFM 12" x 4" Register Booster Fan

SKU: tj8960  |  Model: RB12
Regular price $11900

Color

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Manufacturer's Warranty

1-Year Warranty

What's In The Box?

  • Tjernlund 75 CFM 12" x 4" Register Booster Fan
  • Blower Grille
  • Blower Housing
  • C7 Outlet Plug
  • Owner’s Manual

Info & Guides

Description

Airflow often fades before it reaches a room at the end of a long duct run. The Tjernlund 75 CFM 12" x 4" Register Booster Fan boosts airflow at the vent itself. You don't have to cut into ductwork or find space for an in-line fan.

This booster fits horizontally in a floor or vertically in a wall, so you can add it to the register you already have. Its listed controls are manual and electronic, and the on/off switch inside the register handles manual operation. It plugs into a standard household outlet, so you can set it up without hardwiring.

Key Features and Benefits of the Tjernlund 75 CFM 12" x 4" Register Booster Fan

  • Airflow Boost: Moves 75 CFM of conditioned air out of the register, so you get back the airflow lost on long or restrictive duct runs.
  • 1.4-Sone Sound: Runs at just 1.4 sones, quiet enough that you can leave it on in a bedroom or home office without noticing it.
  • Register Fit: Drops into any 12 x 4-inch floor or wall register, so you can fit it without cutting ducts or resizing the opening.
  • 20-Watt Draw: Uses only 20 watts and 1.7 amps, so running it all season adds very little to your electricity use.
  • Centrifugal Blower: A cross-flow centrifugal blower in a metal housing pushes air steadily through the grille and into your living space.
  • Detachable C7 Plug: The included C7 cord plugs into a standard 110-120-volt outlet and unplugs from the fan, so you can lift it out to clean it.
  • Compact Dimensions: Measures 12 x 4.6 x 4-Inches (L x W x H) and weighs 5 pounds, light enough to pull out when you vacuum the fan wheel.
  • ETL Listed: ETL certification shows the fan has been tested by an independent lab to recognized electrical safety standards.
  • Color Options: Choose a brown or white grille to match your flooring, wall paint, or trim.

Is 75 CFM Enough for Your Problem Room?

This booster has 1 speed, so you get the full 75 CFM whenever it's on. It suits a register with weak airflow, since it is designed to increase airflow where static pressure is lost. Before installing, measure your register opening to confirm it is 12 x 4 inches, and note the fan's 4.6-inch depth.

Sylvane's Expert Take

If you have 1 or 2 rooms that never match the thermostat setting, and your ducts are hard to reach, this is the fix to try first. It works best on long duct runs where a single register falls short of the rest of the house.

The main thing to know is that it treats the symptom at the vent, not across the whole system. Pay the most attention to the drop-in 12 x 4-inch fit and the low 1.4-sone sound level, because those decide whether it fits your vent and whether you'll keep it running. For a weak register in a room you use every day, it is one of the simplest comfort upgrades you can make.

Specifications

    Key Specifications

    • Mounting Type
      Floor, Wall
    • Number of Speeds
      1
    • Sound Level (Sones) (sones)
      1.4

    General

    • Certifications
      ETL
    • Color
      Brown: Brown
      White: White
    • Controls
      Electronic, Manual
    • Maximum Cubic Feet per Minute (CFM) (CFM)
      75.0
    • California Residents
      ⚠ WARNING: This product can expose you to some chemicals, which is known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.p65warnings.ca.gov.

    Power

    • Maximum Amperage (Amps)
      1.7
    • Power Supply
      Plug-In
    • Voltage (V)
      110-120
    • Watts (W)
      20

    Dimensions

    • Depth (in.)
      4.6
    • Height (in.)
      4.0
    • Register Size (W x L) (in.)
      4 x 12
    • Weight (lbs.)
      5
    • Width (in.)
      12.0

    Warranty

    • Manufacturer's Warranty
      1-Year Warranty

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