Cooker hood ventilation issue

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  • July 27, 2005 at 8:41 pm #10952
    admin
    Keymaster

    I have a domestic cooker hood with a built in extractor fan
    which currently ventilates to an outside wall via about 6ft of
    “bog standard” plastic circular ducting (the stuff that looks like
    a “slinky spring toy” with plastic coat on!).

    I am currently having a single storey kitchen extension built which
    means that the outside wall currently used to expell the exhaust, will
    now form part of the new roof space/void.

    no doubt I could just extend the ducting another 10 foot to the nearest
    outside wall in the the new extension, but I think that the overall
    length would just be simply too long to cope with the exhaust.

    I was thinking of installing some sort of “in-line” fan in the wallspace
    at the point where the existing ducting terminates,to boost the airflow,
    then continue with the “extended” ducting to the nearest outside wall.

    Could anyone suggest sutch a device capable of this scenario and are there
    any building regulations to be wary of?

    July 27, 2005 at 8:56 pm #143323
    kwatt
    Keymaster

    There are machines availabel that will do that, known as “remote hoods” and Elica do make them, there’s a link in the Links section. They are not cheap though but will do the job correctly, probably for a long time.

    The nice thing is that you also remove a lot of the local noise as well, so you get a quiet and efficient hood. 😉

    K.

    July 29, 2005 at 6:45 am #143324
    whitegoodsman
    Participant

    Re: Cooker hood ventilation issue

    hi we sell inline duct fans what size ducting do you have if you email your details i will send you some info

    July 29, 2005 at 7:13 am #143325
    Bill
    Participant

    Re: Cooker hood ventilation issue

    Through expirance I have found that this hose you are laking about is not the best stuff to use! Also read instalation instructions as putting to many bends in the outlet is not a good idea also distance can be a problem.

    July 29, 2005 at 9:58 pm #143326
    whitegoodsman
    Participant

    Re: Cooker hood ventilation issue

    yes you are right better to use solied ducting

    July 31, 2005 at 10:28 am #143327
    Graeme
    Participant

    Re: Cooker hood ventilation issue

    For maximum efficiency, the criteria that most domestic hoods are built to is a max hose length of 3m with 1 90 degree bend, 2 m with 2 bends and 1 m with 3 bends. Longer runs are possible, but to maintain the original spec you will probably need an additional fan, as previously discussed.

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