Thank you all for your suggestions, especially GONK. You've all given me a lot to think about. The closet is about 4x4x9 with a pocket door in the theater room and a rear solid door (for access to wiring) in a spare bedroom. I should be able to give an inch for hte rear door and add bathroom vent into the attic (above the equipment closet). Now I just need to locate one that is as quiet as possible...

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dfs