Hon&Guan’s FlexiVent P4 is a 100 mm (4‑inch) inline duct fan for compact ventilation runs and grow tents. It pairs an electronically commutated (EC) motor with a wired variable speed controller, enabling stepless speed adjustment to balance airflow and noise. The P4 connects to standard 100 mm ducting and delivers up to 197 m3/h of airflow, suiting intake or exhaust in small grow tents, hydroponic enclosures, and general home ventilation. The product is offered in a 220 V configuration on Hon&Guan’s store and is presented with the included speed controller for straightforward setup. Within the FlexiVent line, this model provides practical, energy‑efficient airflow where precise control and a small footprint are preferred.