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lightrail 12-14-2012 11:42 AM

Help Identifying Vent Type
 
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Hello DIY Chatroom!

Does anyone recognize this vent type and what it is venting? The photo shows a 4 x 4 inch plastic cover on an exterior wall (about 10 ft above grade). It has a 2 x 2 inch hinged flap that covers a vent hole that is about 1 1/2 inch in diameter. The flow rate is high, I can hear it 200 feet away. It is on very infrequently and not at all when the a/c compressors are running (any one of the five compressors the house has). Home was built in 2009 and is "energy efficient." There's only one of these vents. Please post a reply if you can help me identify what it is venting. Thank you.

<img src="http://farm9.staticflickr.com/8500/8...f50753f8ed.jpg" width="500" height="393" alt="NoisyVent"></a>

oncall 12-14-2012 04:19 PM

Just a guess it might be a exhaust opening.


For a bathroom exhaust fan,kitchen exhaust hood?

whats on the other side of the wall?

lightrail 12-14-2012 04:48 PM

Above it is an entertainment room. Below it is a 3-car garage. It's an exhaust vent, but I know where the kitchen, dryer and bathroom vents all are. I was hoping someone would recognize the cover plate/hinged door. To me, because of the small size and noise level when air is forced through it, it is something that belongs on an RV or cabin crusier.

hvac benny 12-14-2012 05:44 PM

Built-in vacuum exhaust.

jagans 12-14-2012 06:04 PM

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Yeah, That would be my guess too, Central Vac System exhaust

lightrail 12-14-2012 06:10 PM

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Perfect! Thanks. Here's a picture I found with the information you all gave me.


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