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Installing wall exhaust fans at a downwards pitch?

Rocky12 | Posted in Green Building Techniques on

Hello,

I am installing a wall bathroom exhaust fan (Panasonic WhisperWall 70) directly in my external wall. I know that many people angle their ducts/pipes at a slight downwards pitch towards the exterior. There will not be any ducts, just the wall sleeve.

I was thinking of installing this bathroom fan at a slight pitch (even through installation instructions do not say to do so). Is there anything wrong with me doing this?

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Replies

  1. GBA Editor
    Martin Holladay | | #1

    Rocky,
    Q. "I was thinking of installing this bathroom fan at a slight pitch (even through installation instructions do not say to do so). Is there anything wrong with me doing this?"

    A. I can't think of any reason you shouldn't do what you're planning, as long as the pitch is "slight" and as long as the pieces fit together reasonably well, without any significant air leaks.

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