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/8500/8271840177_f50753f8ed.jpg" width="500" height="393" alt="NoisyVent"></a>
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/8500/8271840177_f50753f8ed.jpg" width="500" height="393" alt="NoisyVent"></a>