ActionSingle Acting
Mounting locationWall
Frame materialGalvanized Steel
Mounting hole dia.1/4"
Fits fan dia.36"
Overall square42"
Series556 Series
TypeGravity Operated Single Panel
Tie rod materialGalvanized Steel Frame And Tie Rods
Max. pressure1 in. wc
Max. ambient temp.180°F
Switch actionNormally Closed
Closure velocity rating2500 FPM
Free area9 sq. ft.
Blade seal materialFelt
CounterbalancedYes
Overall height42"
Overall width42"
Overall dia.42"
Flange width1 1/2"
Frame depth2 1/2"
Max. velocity2500 FPM
For use withVertical Mounted Exhaust Fans
Blade materialAluminum
Blade typeFlat Blade
Closure typeGravity
Mounting positionVertical
Opening typeGravity
Single acting/double actingSingle Acting
IncludedPrepunched Mounting Holes
Frame opening b39"
Frame opening height39"
No. of panels1
Frame opening width39"
Frame opening a39"
Rough opening dia.39 1/2"
Flange typeRear Flange
Damper typeStatic
Damper finishMill Finish
Bushing materialStainless Steel
Blade orientationParallel Blades
Max. air velocity2500 FPM
Blade material thickness26 ga.
Damper applicationBackdraft
Frame less flange39
Frame material thickness20 ga.
Rough opening length39 1/2"
Open depth6 1/4"
Mounting hole di.1/4"
Rough opening width39 1/2"
Airflow directionHorizontal
Shutter mounting positionVertical
Shutter mounting locationWall
Rough opening shapeSquare