... by CE&Rohs etc. inline fan for hydroponic (also named Vortex fan/Inline fan/ in-line fan )- Impact resistant, sound absorbing ... '',200mm/8'',250mm/10'',,315mm/12.5''- Cycle 50/60Hz, Voltage 115/220V.- Back Curved impeller matchs ... , Toilets, Utility Rooms.COMMERCIAL - Cafes, Bars, Offices, Restaurants.INDUSTRIAL - Spot Ventilation, Equipment Cooling, Workshop Ventilation.HYDROPONICS - Grow Room ...