Printed from the blog of Lori Greene, AHC/CDC, CCPR, FDAI
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Jun 22 2017

Stack Pressure (video)

Have you run into problems with the effects of building stack pressure on the operation of doors?  Here’s a new whiteboard animation video that explains the basics of stack pressure.

The rest of our whiteboard animation videos can be found on the Allegion Training page, or on the Videos page of

What other topics would you like to see addressed in future videos?

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6 Responses to “Stack Pressure (video)”

  1. cda says:

    Good video!!!

  2. cda says:

    A video on plain touch bars

    Where and when they can be used and when they cannot be used

  3. Jim Elder says:

    Good primer on the causes, but not much on the solutions. The problem is exacerbated where VAV systems are involved because the door cannot be adjusted every time the air volume changes. A solution (like the fire rated vent you linked a year or so ago).

  4. Chuck Park says:

    When I worked in the medical center, I had battles with stack pressure almost every day. Occasionally it was the HVAC system, but more often it was a chocked-open roof door or groundfloor exit door, or just a window that was barely cracked open. But whatever the reason, the result was usually doors that wouldn’t close, or doors that slammed shut, all due to the draft. The real challenge was locating the open door or window. Some of the buildings were very large and very tall, so it wasn’t unusual to spend the better part of a morning or afternoon searching for the problem door or window.

  5. Jeff Clark says:

    Does a records room fire-rated door with access control need to be tied into the fire alarm?
    Want to use an electrified lock with a card reader.

    • Lori says:

      Hi Jeff –

      If the access control system is only controlling an electromechanical lock preventing access from the outside (not affecting egress from the inside), then typically this door would not have to unlock upon fire alarm. If an electromagnetic lock is used, and the lock is released by a sensor on the egress side, then it WOULD have to unlock upon fire alarm. This is also true of controlled egress and delayed egress, but these systems would not typically be used on a records room.

      – Lori

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