×
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

Ventilation/construction requirements

Ventilation/construction requirements

Ventilation/construction requirements

(OP)
Thank you in advance!!

Have a client (in house eng)who is installing an enhanced walk in oven. Disagreement over construction standards.


stats:

480v/3ph/6o hz---115 amps-oven
recirculating 7,000 CFM @ 7 1/2 HP fan motor
exhaust-600 CFM @ 1/2 HP fan motor

TEMP- 500 deg F maximum
150 to 350 deg F normal operating temp
75 deg F above ambient minimum.

I suggest single wall spiral (incorporate a high temp flex connection)with a double wall posi vent thru roof with stack terminating +/- 6'-0" above roof line. Exhaust duct would be under positive pressure. This would meet NFPA 70 & 86. verus a welded schedule 40 pipe run (his Idea).

Please comment.

RE: Ventilation/construction requirements

Does the oven manufacturer suggest anything or are you building this from scratch?

RE: Ventilation/construction requirements

(OP)
No, suggestions fron oven manufacturer except NFPA 70 & 86

RE: Ventilation/construction requirements

NFPA 86 refers to 91 refers to SMACNA and none say exactly what needs to be done for oven exhaust (far as I could see). I think I'd side with you. You want a double wall, not just a sched. 40 iron pipe...
 

RE: Ventilation/construction requirements

I would use a commercial positive pressure material such www.selkirkcorp.com/commercial-and-industrial/product.aspx?id=226
Depending on local code and your design spec, you could get by with single wall material up to the positive pressure material at the roof. Local codes may require a heavy gauge single wall and extended distance to combustibles.
 
 

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