×
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

"Whirly Birds"

"Whirly Birds"

"Whirly Birds"

(OP)
Do "whirly birds" .... the roof mounted attic vents that we see on many roofs actually provide proper ventilation.  I have even seen some that were running backwards.

RE: "Whirly Birds"

They are not much better than static vents.  They can also be annoying if they squeak!

Good ventilation involves a thermostat/humidistat controlled fan.

RE: "Whirly Birds"

(OP)
Thanks for that   I agree.  any idea about reasonable CFM?

RE: "Whirly Birds"

Depends on the size, but all are low.

RE: "Whirly Birds"

Ron:
My experience with whirly birds is that they work quite well and the air extraction is very good... much better than static vents.

Dik

RE: "Whirly Birds"

Dik...maybe my experience is anecdotal, but we have had problems with them seizing from corrosion.  Have you experienced any of that?  I'm in the SE US, near the coast which has some influence, but have seen inland as well.

RE: "Whirly Birds"

I think there is a wide range of quality in these things, both in terms of ventilation and corrosion protection.

You might ask this question of the mechanical guys.

RE: "Whirly Birds"

I also think some installations do not provide the intake vents needed to allow the "whirley birds" to suck the air out.

RE: "Whirly Birds"

That's right, no point in installing vents if there is not enough intake where the air is cooler.

RE: "Whirly Birds"

Ron:

(Sorry, wiping the egg off...) My experience is in Ontario (somewhat humid, but no sea air for corrosion) and in Manitoba (dry)... I've not experienced corrosion issues, but the galvanising on the moveable parts in minimal.

Dik

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