Radon Mitigation Fan 4–4.5 in, 190 CFM, 2 Couplers

Radon mitigation fan helps move basement and crawlspace air efficiently, supporting continuous ventilation with low-noise operation. Designed for 4–4.5 inch piping, this inline duct fan delivers up to 190 CFM airflow while staying around 47 dB—about normal conversation—so it can run day and night with less disruption. A sealed ABS housing and weather-resistant design allow flexible indoor or outdoor placement in attics, basements, or ventilation ducts.

• Delivers up to 190 CFM airflow to exhaust air quickly from basements, attics, and crawlspaces


• Reduces noise with a soundproof frame and foam; operates as low as 47 dB for 24/7 use


• Fits 4–4.5 in (98–114 mm) inlet/outlet for common PVC duct connections


• Includes 2 couplers to simplify installation and help avoid size-compatibility issues


• Withstands moisture and dust with a sealed, waterproof/dustproof housing for indoor/outdoor setups

Built for dependable, plug-and-play operation, this inline radon fan combines strong airflow, quiet performance, and a leak-resistant sealed design to support consistent ventilation where you need it most. Place it along your duct run in the basement, attic, or exterior line to help keep air moving without constant attention. If you’re upgrading an older system or installing a new ventilation run, the included couplers and standard diameter connections help streamline the job. Grab yours today and get your system running with less hassle.

• Airflow: 190 CFM (max)


• Max speed: 2700 RPM


• Rated power: 75 W (US) / 51 W (EU)


• Noise level: as low as 47 dB


• Inlet/outlet external diameter: 4–4.5 in (98–114 mm)


• Dimensions: 12 x 12.6 x 9.25 in (305 x 320 x 235 mm)


• Net weight: 6.61 lb (3 kg, US) / 7.94 lb (3.6 kg, EU)


• Housing material: ABS, fully sealed design