Kitchen extraction saga - opinions please

Joined
4 Feb 2017
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Hi all

I need a new kitchen fitted. Currently only have a useless recirculation extractor and I’m dying for real external extraction.

Of course the room layout doesn’t make this easy. I’m looking for some advice or opinions. I’m maybe over complicating it.. but basically the external wall is almost entirely window. This means I can’t core drill out the walls either side as the lintel is sat on them! Nor do I want to go through the lintel.

I could go up and out the ceiling between joists but, typically, the exterior wall where it would exit has like a 6 brick wide decorative ‘column’, 3 bricks are my side, 3 bricks are the neighbours. A 150 wide hole would be right up against the edge of this brick outcropping and it would break and fall off and look a sod. Imagine a flat wall, and there is a 6 brick wide, one brick deep ‘extrusion’ that’s the height of the house - that’s what it is.

In addition! This area is right next to the neighbouring house so it’s a bit rude to pump cooking smells out right over their front door.

  • I see the following options..
  • Reduce from 150mm to 100mm and go out this weird brick outcropping and hope it doesn’t damage anything. Accept increased noise and reduced performance. I don’t think this is ideal
  • Get an expensive downdraft extractor job and go out at ground level. Not ideal as it’s right at the neighbours front door, and I’d need to put the oven somewhere else as these hobs are deeper
  • Do the above but use angled ducting to move the outlet away from the neighbours door. There’s a limit to ducting length which reduces with each bend. I’d need four bends which reduces 5m permissbsle length to 1m- but I’d need about 3m to route out the wall. So perhaps I add an in line fan to increase the power..
  • I have a recirculation extractor and add an extractor fan on the wall somewhere. Two options with this.. I could lose a cupboard and place this at waist height beneath a window. I’m not sure this is optimal, ideally it would be above head height
  • I situate it somewhere central in the room, such as in ceiling, and duct it out above the window


I’m thinking the simplest, easiest option would be a recirculation extractor of a good quality, mount an extraction fan into the ceiling, and duct it out between the joists. Mostly I want to ensure moisture is removed, secondary is smells!



Anyone have any experience of this awkward situation, what did you do to solve it?
 
First off I dont think there are any regs as such - you said 5m permissbsle length. That is just a performance guideline I think.
If you are thinking of adding a ceiling one and running g through the joists why can't you do that with an extract
Also far from ideal but would the rectangle ducting fit better under the lintel or the 6 brick thingy
 
First off I dont think there are any regs as such - you said 5m permissbsle length. That is just a performance guideline I think.
If you are thinking of adding a ceiling one and running g through the joists why can't you do that with an extract
Also far from ideal but would the rectangle ducting fit better under the lintel or the 6 brick thingy
Yes, when I mention permissible, I’m referring to the manufacturer guidelines for performance!

If I run between joists at site of extraction it’s going to come out this weird brick column. If I go 4 inch it MIGHT be ok but I think it will be touch and go whether the bricks spall and fail. Not sure what’s behind this ‘column’ either. I think it’s jsut decorative.

If I went rectangular on the outlet I think it would risk going over the middle where my property edge is. think it would be a pig to achieve, at least when drilling a circular core out you just push straight through
 
Yes, when I mention permissible, I’m referring to the manufacturer guidelines for performance!

If I run between joists at site of extraction it’s going to come out this weird brick column. If I go 4 inch it MIGHT be ok but I think it will be touch and go whether the bricks spall and fail. Not sure what’s behind this ‘column’ either. I think it’s jsut decorative.

If I went rectangular on the outlet I think it would risk going over the middle where my property edge is. think it would be a pig to achieve, at least when drilling a circular core out you just push straight through
You could always but the rectangle duct vertical - its 50mm x100mm
Although I had rectangle and changed to 100mm round and it made a big difference in performance with the 100 round.
I believe there is also a bigger rectangle profile 50mm x 200mm
 

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