VEVOR’s 12-inch Shutter Exhaust Fan pairs an EC motor with a programmable temperature/humidity controller for automated ventilation. The 305 mm model is rated up to 904 CFM (about 1,500 m³/h) at 1,650 rpm and draws approx. 40 W. The included controller offers 10 speed levels plus temperature and humidity triggers, timer, and alarms; it maintains setpoints without manual adjustment. Construction is all‑metal: powder‑coated steel frame with aluminum fan and shutters, and an enclosed, thermally protected motor. The louvered design opens with airflow and closes when off to block drafts and debris. Typical supply is EC 120 V/60 Hz in the U.S. and EC 220 V/50 Hz in EU variants. Suitable for greenhouses, garages, sheds, and small workspaces.