Downblast Ventilator, Belt, Roof, Motor HP Range 1/4 to 1/3/ WIDTH: 22.0 INCHES NOMINAL DIAMETER: 24.3750 INCHES NOMINAL LENGTH: 22.00 INCHES NOMINAL PART NAME ASSIGNED BY CONTROLLING AGENCY: EXHST FAN 1530 CFM SPECIAL FEATURES: USA:22"BASE(W) X 26-5/8"(H) X 22"BASE(L) METRIC: 558.8MM BASE(W) X 676.3MM(H) X 558.8MM BASE(L) HEIGHT: 1.7500 INCHES NOMINAL MATERIAL: ALUMINUM HOUSING