SV-72'' WALL FAN --Quiet & Extended Operation --Very efficient energy saving single or 3 phase motor , CE / CSA / UL approved; --A totally enclosed motor; --Allows ramping on start optimizing life expectancy with VSD(Variable Speed Drive); --Extended year-round operation hours because of high efficiency and high torque low speed; --Low annual operation cost; --All fans are supplied completely assembled and are tested before shipping. A regimented calibration and verification schedule is followed. Every fan is bench tested prior to shipment to prevent start-up delays Be assured, SMART fans provide the performance you require and expect. Technical Specifications STEEL BOX FAN TypeDimension (mm)Blade Size (mm)Speed (r/m)Air flow (m3/h)Power (Kw)voltage (V)HzPhaseSV -72' '2030x2030x5501830300867002.2230/380/415/46050/603