Cooker hood without ducting

Discussion in 'Kitchen Fitters' Talk' started by DannyDoLittle, Oct 12, 2017.

  1. DannyDoLittle

    DannyDoLittle Member

    Evening gents.

    Just looking for pointers for a decent cooker hood that doesn't need to have ducting to an outside wall, or if it does need ducting it has to be very compact / small diameter as possible.

    Any pointers please folks.

    The reason for this is that to the immediate right side of the hood position (in the ceiling) there's large steelwork and towards the outside wall the joists run in the wrong/opposite direction that what the potential ducting route would be
  2. CGN

    CGN Well-Known Member

    Occasionally I've had to box in ducting at ceiling height when faced with this issue. Are there any wall cupboards along the run to the outside wall?
  3. KIAB

    KIAB Well-Known Member

    Always better to vent to the outside, then you don't need to keep buying the charcoal filters.
    And go for a cooker hood with a 150mm outlet, it's more efficent & quieter than one that uses a small 100mm pipe, can always use flat ducting then round to rectangular adaptor on hood,
    wall flap vent can be rectangular or round, which ever works best.
  4. DannyDoLittle

    DannyDoLittle Member

    Ok, you've mentioned the flat ducting which I've looked into and found that I can get 25mm flat ducting and the relevant adaptors from the hood to the external wall with a flap vent or something similar.

    With the 25mm flat ducting this can be channeled out of the bottom of the floor joists and hidden which will work perfect.
  5. dobbie

    dobbie Well-Known Member

    If you have not tacked the ceiling yet,fix 2x1 roof battens to the joists and fit the plasterboard to them, the ducting will then be under the plasterboard.
    Not a good idea to take a big notch like that from the bottom of the joist.
    There are charts about notching and drilling joists.
    DannyDoLittle and KIAB like this.
  6. KIAB

    KIAB Well-Known Member

    You never notch the under side of a joist.
    From experience use 50mm x 38mm batten,instead of the 2x1, as it gives you a bit of wiggle room for the ducting, & enough space for a fall to allow any moisture to drain out, & not collect in the ducting & go mouldy..
    DannyDoLittle likes this.

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