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

Exhaust Ventillation

Exhaust Ventillation

Exhaust Ventillation

I've installed an exhaust fan in my crafts room(10 inch outflow), and venting through an outside wall brings paint fumes back into my home through the windows. I want to run piping underground about 50feet out,(easy to do here) and 10" pvc is too $$$. Can I connect from 10" to 6" without compromising the efficiency much?? The fan is a 2000 cfm running medium speed.   

RE: Exhaust Ventillation


Try 3 @ 6".


Mike Halloran
Pembroke Pines, FL, USA

RE: Exhaust Ventillation

Hello Mike...thanks for your response. Your "NO" I assume means ...No you can't do that, it will effect the effiency greatly!! (??) But what do you mean by "try 3 @ 6"??? .....sorry if I'm a little dense here.

RE: Exhaust Ventillation

I mean three, or four, 6" dia PVC runs next to each other, in parallel.  You can use a plenum to join them at the fan end, i.e., the blower exhausts into a box that has multiple outlets.


Mike Halloran
Pembroke Pines, FL, USA

RE: Exhaust Ventillation

Or just buy an activated charcoal filter.


Mike Halloran
Pembroke Pines, FL, USA

RE: Exhaust Ventillation

Now I get it...Thanks Mike....I'll try the 3pcs of 6" out of a box.

RE: Exhaust Ventillation

What static pressure is your fan rated at for 2000 CFM?

Depending on your fan you may not get the flow you want if you have to run the duct 50 feet.

Could you turn the duct vertically and discharge it a few feet above the roof peak, using galvanized duct instead?

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