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How far do these dampers open, it looks like from the picture its only a 1/4 of the way open from the damper I currently have. The one I have is like a butterfly valve its stands 90 degrees straight up when open fully.
Posted by Elite Deals - Chris M. on 24 October 2013 03:48 PM

Our Answer:

This unit does indeed open fully when the handle is released.

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