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Automatic Dryer Duct Booster Exhaust Fan

Tjernlund ★ 3.4/5 · ItemOracle Score Premium

$200 USD
Price subject to change
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Tjernlund M-4DBT Automatic Dryer Duct Booster Exhaust Fan for Clothes Dryers

Automates exhaust boost for clothes dryers to improve airflow and reduce drying times. Customers note improved drying time, especially on long duct runs

Highlights

  • automatic activation with dryer
  • boosts airflow up to 200 CFM
  • supports duct runs up to 100 feet

Pros

  • 200 CFM fan improves airflow
  • Automatic activation synced with dryer
  • Post-purge setting
  • Effective for long runs up to 100 ft
  • Strong build quality noted by users

Cons

  • Installation experience varies
  • Noise level opinions are mixed

Best For

  • long dryer duct runs
  • damp laundry areas
  • homes with multiple duct bends
  • situations needing faster drying times
  • automatic dryer performance optimization
  • improving venting for extended ductwork

Features

  • Reduces drying times by boosting dryer exhaust with 200 CFM airflow for long duct runs
  • Automatically activates with the dryer and includes a post-purge setting to clear residual lint
  • Supports duct runs up to 100 feet and works with any residential clothes dryer brand
  • No manual intervention required; universal switch triggers the fan when the dryer starts

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