Quote:
Originally Posted by cstreit
New furnaces require fresh air inlet.. Could have been one of those too...
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This is way way too small and restrictive for any kind of appliance intake or vent.
Quote:
Originally Posted by piscator
Entrance to the mouse disco? ;-)
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This makes the most sense so far.
Quote:
Originally Posted by Shaun @ Tru6
Radon relief vent
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For radon, it should be above any other air entry point like a window.
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