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  1. #1
    Join Date
    Jan 2008

    Default Ventfan distance from the outside


    I am working on installing a new bath in our basement. I'd like to know what the maximum distance for the ventfan should be from the outside of the house as the location I have chosen for the bathroom would lead to a distance of around 21ft. Is this acceptable and is there code for Michigan?

    Any help greatly appreciated....


  2. #2

    Default Re: Ventfan distance from the outside

    I don't know MI code but if you're in a staight line with 1- 90 degree turn at 21 feet and a 140 cfm fan thats about 0.2inch static drop you should be ok.Look on the spec sheet for the fan .The turns are what hurts the fan performance and remember flex duct also reduces performance so use hard pipe if you can, at least for the long run.

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