Loren Cook 70 CPV Exhaust Fan, Centrifugal Unit With A Backward Inclined Aluminum Wheel, Full Welded Housing, Most Economical Choice For Vent Or Utility Set, Typical Application Includes General Ventilation And Up To 300 Degrees Restaurant Exhaust, Optional Hurricane (NOA) And Seismic (OSHPD) Certification Are Available, SN: 297S178467010017402