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Venting through soffit

  • 09-08-2022 4:00pm
    #1
    djt0607
    Registered Users, Registered Users 2 Posts: 245 ✭✭


    Hi,


    Thanks, in advance for all of your replies.

    So I'm after redoing my ensuite (Tiling/new shower/etc)

    I've installed an extractor fan in the ceiling. The flexi pipe is connected to it in the attic and, my thinking, is that it travels to a vent in the soffit (which I may fit in a while....pending on what I hear here first)

    The soffit has narrow vents in it (I'm assuming for venting the attic) These vents run along the soffit and are all about 3 foot apart. The vent for the shower will go in between two of the vents.

    However, before I have started any job, I was doing a bit of reading online and read that I should exercise caution when doing this as it may be the case that I extract from the shower vent fitted in the soffit and the air moisture is sucked right back into the attic through the attic vents in the soffit.

    I read that this MAY be the case and to EXERCISE CAUTION. Since this is ambiguous, I'm thinking of the likelihood this scenario will occur. In the soffit, the attic vents are about 3 feet apart.. So when I install the shower extractor vent, it'll be about 1.3 feet away from either attic vent.

    Should I proceed?


    Thanks again.



Comments

  • #2
    C. Eastwood
    Registered Users, Registered Users 2 Posts: 757 ✭✭✭C. Eastwood


    https://www.boards.ie/discussion/2058258146/venting-through-soffit

    Proceed.

    I don’t believe that could occur.

    Furthermore, the ventilation in the attic is through ventilation. The wind pressure caused the air to blow in through the vents at the windward side, and is sucked out at the leeward side. This will prevent condensation from occurring in the attic void.



  • #3
    chooseusername
    Registered Users, Registered Users 2 Posts: 4,071 ✭✭✭chooseusername


    I would vent it out through the roof.

    It’s a simple enough job using a tile roof vent;

    https://www.roofnstop.ie/tile-roof-vents.html

    Warm moist air will want to rise, so a straight short run up through the roof is best

    rather than a 90 deg. bend then a horizontal run to the eves then another 90 deg bend finishing in a downward direction blowing moist warm air out at the soffit vents and thus flowing back into the ventilated space.

    In a cold attic the moist air in the horizontal run will condense and leak.

    Post edited by chooseusername on


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