| Brand | DAYTON |
| Type | Shutters |
| MPN | 4HA12 |
| Model | 4HA12 |
| UPC | 190735324950 |
36 In.H-W Aluminum Ceiling Truss Damper, Frame Material Aluminum, Number of Panels 1, Maximum Air Velocity 1500 fpm, Overall Height 37 3/4 in, Rough Opening Shape Rectangular, Fits Fan Diameter 36 in, Free Area 7.1 sq ft, Overall Width 36 in, Frame Material Thickness 0.1 in, Frame Depth 1 3/8 in, Rough Opening Length 35 3/4 in, Maximum Pressure 1 in wc, Rough Opening Width 34 in, Blade Material Aluminum, Closure Type Gravity, Flange Width 1 5/8 in The DAYTON(R) 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. mounti.