MIDCVFRUN 4″ Dryer Vent Booster Fan – 260CFM, Auto On/Off

The MIDCVFRUN 4″ Dryer Vent Booster Fan (Model RF-110W1) is the solution for slow-drying laundry caused by restricted airflow in long or complex dryer vent systems. Designed for seamless integration with most electric and gas dryers, this automatic inline exhaust fan boosts airflow to **260CFM**, cutting drying times and eliminating lint buildup—without the need for manual adjustments. The built-in **pressure switch** activates the fan only when airflow drops below optimal levels, ensuring energy efficiency and quiet operation.

Featuring a **universal 4-inch ducting design**, this booster fan installs directly into existing vent systems, making it ideal for both indoor and outdoor placements. The included **real-time display indicator** on the pressure switch lets you monitor fan operation from inside your home, while the **anti-clog blade** and sealed construction minimize maintenance and extend the fan’s lifespan to **up to 10 years**. With a **3-year warranty**, this durable, ultra-quiet fan is built to handle high-volume use while reducing noise and improving drying performance.