4-Inch Inline Duct Fan

VEVOR’s 4-inch inline duct fan is a compact EC‑motor exhaust unit for short ventilation runs, grow tents, and hydroponic enclosures. The 101.6 mm duct size matches standard 4 in ducting and the fan ships with a temperature/humidity controller offering on/off, timer, and auto alarm modes; speed is adjusted manually. Model operates on 110–240 V, 50/60 Hz, with rated power of 21 W and a maximum airflow of 205 CFM. Noise is listed around 28 dB, and the package includes slings, anti‑vibration pads, and straps to simplify mounting. The housing measures 300 × 235 × 182 mm. This size works as a booster or primary exhaust for small tents or equipment cabinets where modest, controllable airflow is required.