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  • in-line bath fan

    Need to replace my bath fan, too noisy. In-line bath fan is one of the options. The distance between the ceiling and the roof is only about 4' in my case. Some inline fan recommends a minimum 8' distance between the ceiling and the fan to get a quiet operation. for example: http://www.fantech.net/pbmanual.pdf

    I am wondering is anybody has experience with inline bath fan can tell me if the inline fan is a good solution in my case?

    thanks

  • #2
    Re: in-line bath fan

    Can you pipe it out a gable end? I have installed the Nutone ILFK stuff before, and I have another job bid which requires a ILFK130. In my own house I have the Broan 744. Its a combination can light/fan. Looks just like a can light from the bathrooms. Its super quiet and moves plenty of air for my bathrooms.

    Andy

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    • #3
      Re: in-line bath fan

      yes, i can do that way but it will be 15' long path then. is it too long?

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      • #4
        Re: in-line bath fan

        should I use this duct with insulation, http://www.lowes.com/lowes/lkn?actio...120&lpage=none or this one, http://www.homedepot.com/webapp/wcs/...ctId=100396934 ?

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        • #5
          Re: in-line bath fan

          Take a look at the specs on the Nutone. I'd recommend looking at something a little bigger than the 4" you were considering. You just arent going to move alot of air quietly through a 4" duct.

          http://www.ventingdirect.com/index.c...3731/finish/NA

          My recommendation is to hard pipe it and then insulate the pipe. Getting 5" round duct insulation over 5" hard pipe is tricky but it can be done. Reflective bubble wrap taped with aluminum tape is another option for insulating.

          Andy

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          • #6
            Re: in-line bath fan

            Hi Andy,

            if I use a regular bath fan like yours, do I need to get rid of the existing 3" pipe or I can just use a adapter to keep the existing 3" pipe with my 4" bath fan?

            thanks

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            • #7
              Re: in-line bath fan

              The Broan 744 has a 4" connection. I would recommend keeping the pipe size 4" all the way to achieve the maximum airflow. The 744 is rated at 70 cfm. I am really happy with mine, and this price of $85 is pretty good too, just as long as they dont screw you on shipping.

              http://www.ventingdirect.com/index.c...facturer/Broan

              Andy

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              • #8
                Re: in-line bath fan

                Then which 4" duct I should use, the Lowes one or the Homedepot one (please refer to my third reply)?

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                • #9
                  Re: in-line bath fan

                  If its in an uninsulated attic which gets cold, then the pipe should be insulated to protect from condensation. In which case I would have to choose the stuff you selected from Lowes.

                  Andy

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                  • #10
                    Re: in-line bath fan

                    Hi Andy,

                    If using in-line fan with a gable end do I need a special outlet or just let the duct ended at the gable? If the pipe does not actually extended out from the gable, will the attic get moisture later?
                    thanks,

                    Comment


                    • #11
                      Re: in-line bath fan

                      I'd put a louver on it, something along the lines of a Deflecto.

                      Andy

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