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Old 12-14-2012, 10:42 AM   #1
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Help Identifying Vent Type


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>
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Old 12-14-2012, 03:19 PM   #2
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Help Identifying Vent Type


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?

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Old 12-14-2012, 03:48 PM   #3
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Help Identifying Vent Type


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.
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Old 12-14-2012, 04:44 PM   #4
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Help Identifying Vent Type


Built-in vacuum exhaust.
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Old 12-14-2012, 05:04 PM   #5
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Help Identifying Vent Type


Yeah, That would be my guess too, Central Vac System exhaust
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Last edited by jagans; 12-14-2012 at 05:07 PM.
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Old 12-14-2012, 05:10 PM   #6
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Help Identifying Vent Type


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