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

ASHRAE 62.1 Ventilation Rate Procedure (VRP) Questions

ASHRAE 62.1 Ventilation Rate Procedure (VRP) Questions

ASHRAE 62.1 Ventilation Rate Procedure (VRP) Questions

Hello all, posting this on a Friday afternoon, so I may come back to this for revision later. I just completed my first design for a replacement of two AHU's on a single floor of an academic building. This floor is 80% offices, a lab, computer rooms and misc. other stuff. One common corridor connects (most) everything. My boss asked me to calc the minimum CFM needed for the VAV and said that it would be based on the 62.1 AHSRAE VRP calculation. Correct me if I am wrong, but I went through the calculation and I am stuck at the variable Vdzm (minimum supply/discharge to zone used to calculate Ev, cfm; in VAV systems, Vdzm is the minimum expected value of Vdz). So it looks like 62.1 VRP procedure uses those Vdzm to help calculate the overall minimum outdoor air intake. If I already have to estimate what the VAV's are doing at their minimum flow, what else is this calculation good for?

Any advice is appreciated. I am also willing to share some files if that would help (select construction documents and my VRP calculation spreadsheet). Happy Friday!

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


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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