18" Propeller Exhaust Wall Fan, Low Pressure

Airmaster Fan Model EPRSM30 115V 1-PH 1/4-HP Totally Enclosed Motor 4970-CFM @0.0" S.P., 3510-CFM @1/8" S.P. Percieved Pressure Sound 12/Sones @5' Panel Size (Square) - 33-1/8 Inch Wall Opening (Square) - 30-1/2 Inch 

Airmaster Fan Model PD18T-D3A EDP# 24201 115V 1-PH 1/16-HP 1110-RPM 2-Speed Ball Bearing Motor 2680-CFM @0.0" S.P., 2414-CFM @1/10" S.P., 2332-CFM @1/8" S.P., 1789-CFM @1/4" S.P. Percieved Preasure Sound 12/Sones @5' Panel Size (Square) - 24 Inch Wall Opening 18-1/2" 3D picture

Airmaster Fan Model H48V836-3 3-HP 230/460v 3-PH 850-RPM Totally Enclosed Motor 27420-CFM @0" S.P., 25800-CFM @1/8" S.P, 24350-CFM @1/4" S.P. 22600-CFM @3/8" S.P. Percieved Pressure Sound 40.7/Sones @5'

Airmaster Fan Model LPSF24 Formally Model EPRSM24 115V 1-PH 1/4-HP Totally Enclosed Motor 3214-CFM @0.0" S.P., 2015-CFM @1/8" S.P. Percieved Pressure Sound 11.7/Sones @5' Panel Size (Square) - 27-1/8 Inch Wall Opening (Square) - 25 Inch