4-Inch Inline Duct Fan Kit, Carbon Filter, App Control

Inline duct fan kit boosts grow tent ventilation with consistent airflow to reduce stagnant-air odors and keep plants in a healthier environment. The 4-inch (101.6 mm) EC motor fan delivers up to 205 CFM (349 m³/h) with 0–10 speed control via PWM controller and smartphone app, so you can fine-tune airflow and monitor conditions without constant manual adjustments. Designed for indoor gardening, hydroponics, and small exhaust setups.

• Delivers up to 205 CFM (349 m³/h) airflow to refresh air and support steady circulation in grow tents and small rooms


• Controls speeds with PWM + app control, offering 4 auto modes and 0–10 levels for precise ventilation tuning


• Runs quietly at low speed (as low as 27.1 dB, varies by setting) for overnight or extended operation


• Includes fan, manual, 2 clamps, 2 hanging straps, and 8 ft double-layer aluminum foil duct for a complete basic setup


• Mounts easily with wall-mountable, lightweight housing to fit tight spaces and common ducting layouts

Built around an energy-efficient EC pure copper motor, this exhaust ventilation fan is designed to limit heat buildup during long runs and stay reliable in demanding indoor environments. Use it to maintain fresh airflow in grow tents, indoor gardens, hydroponic setups, or as general-purpose duct ventilation—especially where odors and fine particles tend to linger. Set your preferred speed, keep airflow stable, and spend less time troubleshooting poor circulation. Grab yours today and get your ventilation dialed in.

• Duct size: 4 in (101.6 mm)


• Airflow: 205 CFM (349 m³/h)


• Speed: up to 3000 RPM


• Air pressure: 350 Pa


• Power: 25 W


• Noise: as low as 27.1 dB at low speed (varies by speed)


• Dimensions: 12.01 x 8.27 x 7.28 in (30.5 x 21 x 18.5 cm)


• Net weight: 9.92 lb (4.5 kg)