×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Gererac Exhaust Pipe Sizing

Gererac Exhaust Pipe Sizing

Gererac Exhaust Pipe Sizing

(OP)
Anyone familiar with a Generac Model QT080 generator?  It is an 80 kW unit with a 5.4L natural gas engine.  It is designed to be installed outdoors, but I have been asked to put one inside.  Since we are going against the manufacturer's intent, they are not offering any help ... other than helping us to know that the warranty is void.  

All I know on the exhaust is that it is 649 CFM @ 800 Deg F.  I do not have any information on backpressure, etc.  The generator will sit in a basement and the flue must be routed up 7 stories to the roof.  

How do I size the flue pipe with no help from Generac?  

RE: Gererac Exhaust Pipe Sizing

What about the UL rating? The local AHJ will require the plant is installed as per mfgs instructions. What happens when the unit catches on fire? I believe you will take on tons of liability. Can Generac take the unit back and modify the plant? An 80 KW is not a big unit, sell it used and buy the correct plant.  

RE: Gererac Exhaust Pipe Sizing

DrRTU stated it best - it is a HUGE liability.  If the manufacturer won't stand behind an interior installation - that's all I would need to know.  I wouldn't stamp a design as such.

My question with venting any generator is it capable of +70 feet of vertical discharge for the exhaust.  

Andy W.

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!


Resources