Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Lift lobby/well pressurization

Lift lobby/well pressurization

Lift lobby/well pressurization

What's the air changes to be considered for pressurization of

(a)  Lift well
(b)  Lift lobby


RE: Lift lobby/well pressurization

By lift well, I guess you mean elevator shaft.

This pressurization business comes into play only for buildings requiring smoke evacuation systems.
In the US, we simply don't pressurize elevator shafts. Unfortunately, life safety is one the vaguest areas in our industry in the US, there is so much liability (we have 60% of the world's lawyers) that the codes keep being revised with more and more "engineered systems" being called for by the code. There is not one code that will say pressurize or not pressurize elevator shafts (including ASHRAE).
The problem with elevator shafts is that here we require them to have a relief opening at the floor below the top floor. So pressurizing the elevator shaft is just not practical, we do use elevator lobby pressurization at o.5" static pressure when required such as pressure sandwitch in smoke control in jails and the likes.

If I were to pressurize, I will make sure that the system serving the lobby is a dedicated system and all other adjacent areas go into negative in a smoke control mode, this will keep the smoke from migrating from one floor to another through the elevator shaft.

why do you want to pressurize anyway? is your application a smoke control issue? or just comfort? Your air balance for your entire ebuilding should see a 5% to 10% positive pressure overall anyway.

Not much help from this side of the Atlantic on this one I am afraid.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close