For doors that have to operate under a differential pressure, Overly has designed a developed two pieces of hardware to assist in opening these types of doors.
Overly manufactures a pressure relief vent that equalizes pressure across a door opening. This is helpful in doorways connecting subway tunnels and other openings where differential pressure makes it difficult to open a door.
In addition to our pressure vents, we also offer breaker bars.Breaker Bars are designed for doors that are difficult to operate because of pressure differentials due to air handling.
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