High Performance Axial Fan Model (RA-450-225) These fans can be used in all air, smoke and fire ventilation application, including parking, tunnel, stairway, lifts, hall, office, exhaust, fresh air etc. With fan energy consumption quickly becoming a growing concern and regulations changing across the globe,ensure that youre optimizing your fan selection by selecting a Greenheck RA fan. Model RA is the most effi cientinline fan manufactured by Greenheck and was designed to meet a minimum Fan Effi ciency Grade (FEG) of 75.This exceeds the requirement adopted by the IGCC (International Green Construction Code) for standalonesupply, return and exhaust fans of an FEG greater than or equal to FEG 71. Rely on our expertise in air movementtechnology to assist you in improving the operational effi ciency of your systemDesign Features:Aluminum air foil bladesIntegral straightening vanesGalvanized casingHot Dipped casingExtended motor leadsIntegral punched inlet & outlet flangesvarious mounting options available base mount, ceiling mount, horizontal mount, vertical mount, wall mount, roof mount, ECM motorsVarious motors options available: Single or two, IE3 efficientHigh temperature operations: 300 C @ 2 hours, 400 C @ 2 hours