OEM#: 20UA72

21 IN.H 57 IN.W DRNBL EXTRD ALU INTAKE LOUVER, LOUVER TYPE STATIONARY BLADE, FRAME TYPE FLANGED, FRAME DEPTH 4 IN, MOUNTING STYLE SURFACE MO by DAYTON ELECTRIC MANUFACTURING CO

21 IN.H 57 IN.W DRNBL EXTRD ALU INTAKE LOUVER, LOUVER TYPE STATIONARY BLADE, FRAME TYPE FLANGED, FRAME DEPTH 4 IN, MOUNTING STYLE SURFACE MOUNT, OUTSIDE HEIGHT 17 1/2 IN, OUTSIDE WIDTH 53 1/2 IN, ROUGH OPENING HEIGHT 18 IN, ROUGH OPENING WIDTH 54 IN, LOUVER MAXIMUM INTAKE 3,515 CFM, MAXIMUM EXHAUST 5,026 CFM, MAXIMUM OUTSIDE WIDTH 56 1/2 IN, MINIMUM OUTSIDE WIDTH 56 1/2 IN, FLANGE WIDTH 1 1/2 IN, FREE AREA 3.3 SQ FT, BEGINNING POINT OF WATER PENE