Contact US

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!

*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

MCC Room Ventilation

MCC Room Ventilation

MCC Room Ventilation

Are there any industry recommendations for pressurizing a MCC Room with HVAC and fresh air make-up?  Would I being assuming too simple of a system with a closed-loop AC system with a fresh air fan which provides fresh air and positive pressure, maybe controlled via a VFD and a pressure transmitter.  I would also assume 0.5 inches of pressure would be sufficient.

RE: MCC Room Ventilation

Well, 0.5" of differential pressure would be more than sufficient for pressurization. Even 0.1" would be adequate.

How big an MCC room? What is the requirement for pressurization?

I'd recommend cross-posting this over to the HVAC forum:


RE: MCC Room Ventilation

I have not seen any industry standard advising MCC or Control Roomoom Pressurization value.

Normally, the pressure level is obtained from pressurizator manufacturers index,or trough  basic practices coming from enginnering consulting and/or installing firms.

The "standard" pressurization value ranges from 0.05 to 0.15 "H2O.

Take in account, the wind speed an incidence angle over windows, doors and cracks belonging to the MCC room.



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! Already a Member? Login


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