4” Booster In-Line Duct Fan. Duct booster fans increase airflow in hard-to-ventilate rooms. They are durable, quiet, easy to install, and fit into metal or flex ducts. Their strong motors, excellent performance, and higher temperature ratings set these booster fans apart. Rated for both heated and cooled air and perfect for outdoor AND indoor use. Also available in 8" model.
Please note this booster fan in now made out of plastic, the outside of the item is still metal.
- 120 CFM
- Maximum temperature: 142F