dayton 30" whole house fan economy ceiling truss shutter/ceiling shutter, 28-3/4" x 33-7/8" opening requi cai - dayton the dayton ceiling truss shutter is recommended for horizontal-mount exhaust in residential ceilings for whole house fans. truss shutter installs without framing or cutting the ceiling joist. tie rods at each end side of shutter assure uniform opening when fan is operating. white extruded aluminum frame with 1-1/2" flange and 3/16"-dia. mounting holes. white louvers with felted edges.<br /><br /> item: whole house fan economy ceiling truss shutter / ceiling shutter<br /> fits fan dia.: 30"<br /> shutter overall size: 31" l x 36" w<br /> shutter construction material: extruded aluminum frame and g-90 galvanized tie rods<br /> shutter opening required: 28-3/4" x 33-7/8"<br /> shutter free area: 5.435 sq. ft.<br /> shutter mounting position: horizontal<br /> shutter mounting location: ceiling<br /> shutter item: whole house fan economy ceiling truss shutter<br /> length: 30-3/4"<br /> width: 35-7/8"<br /> frame depth: 1-3/8"<br /> open depth: 5"<br /> flange width: 1-1/2"<br /> mounting hole size: prepunched<br /> max. velocity: 1500 fpm<br /> blade material: white painted aluminum<br /> for use with: 3c374, 3c546, 5m155<br /> number of panels: 1<br />