... and approved by CE&Rohs etc. inline fan for hydroponic (also named Vortex fan/Inline fan/ in-line fan )- Impact resistant, sound absorbing heavy gage ... Rooms.COMMERCIAL - Cafes, Bars, Offices, Restaurants.INDUSTRIAL - Spot Ventilation, Equipment Cooling, Workshop Ventilation.HYDROPONICS - Grow Room Ventilation 10 reason to choose ...