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kingfisherinteriors

Kitchen extractor up old chimney?

Kingfisher Designs
hace 2 años
última modificación:hace 2 años

I've got a client getting a new kitchen and an extractor is being built into the old fireplace, it was original envisioned to extract up the chimney (Which is lined and cowled as it used to be for an aga stove) but someone has at some point persuaded them it would be a bad idea due to condensation.

I'm no expert on these sorts of things though it was my idea, as it's what I'd do myself, but what do people think?

The chimney liner is steel at 200mm diameter and runs to about three stories. The chimney looks to have been cowled with a metal cover to stop rain coming back down but allow smoke out. The extractor has a 700m3/h flow.

My thinking is it should be OK as the chimney should naturally have a small draw at all times which should keep it clear, and the extractor should be just as easily able to vent up that then have to take a convoluted turn to get out sideways and maybe reduce the diameter? Possibly if instead of piping it straight up it could join in a T piece so condensation can travel down a separate weep hole/pipe and bypass the extractor unit?




Comentarios (2)

  • Jonathan
    hace 2 años

    There is a calculation of how much extraction is lost over long lengths of ducting….but I can’t find it.

    Personally I would be looking at an additional remote motor to ensure extraction is effective:

    https://www.falmec.uk/en_gb/accessories/remote_units-1.html

  • PRO
    Lifestyle Kitchens
    hace 2 años

    Vent axia recommend that if your ducting runs into unheated roof voids there should be a condensation trap, bearing in mind you have warm moist air travelling upwards through a metal liner that may be closer to outside temperatures and at quite a distance I think that I'd recommend fitting a condensation trap to be on the safe side. Last thing you want is a call back from a customer who has water dripping from their extractor into their dinner. Its certainly a good idea to make use of the chimney for ducting.

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