Daox, Have you considered using pop rivets and some high temp RTV to seal around the rivets? I hate blowing all that heat outside. When my kids were young I vented the electric dryer in the house in the winter and outside in the summer. My wife was not all for it but it worked for me. I have been looking into making a HX for my new home and your Idea has got me thinking. Thanks and good luck, let us know what you come up with.
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