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cooker hood extraction
wayne
Posts: 317 Forumite
hi,i,m looking to fit a ducting kit from our cooker extractor to vent outside.i,ve measured the hole in the hood and its approx four and a half inches across.question is do i have to have one that size or can i buy a five inch kit and make do?hope someone can help.any advice welcome.
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I'm not convinced there is such a thing as a 4.5 inch extraction. It normally comes in at 4". Go to any decent plumbers merchants and ask for a 4" flexi extraction pipe for a cooker hood. Should be no more than a tenner.Eat vegetables and fear no creditors, rather than eat duck and hide.0
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Err, wrong I'm afraid.
Many hoods NEED a 5 inch vent or you get a vortex in the hood causing them not to extract the air properly, if at all. Refer to the manufacturers instruction and if they say it need a 5" vent then they say so for a reason. I have come across several that don't work due to insufficient venting, in other words, the installer didn't bother to read the instructions which is a very common occurrence.
The last thing you want is to have to rip it all out and redo the whole thing just because the vent can't cope.
A lengthy article I wrote on hoods here
HTH
K."It ain't what you don't know that gets you into trouble. Its what you know for sure that just ain't so." Mark Twain0 -
You'll find the 4" easier to work with. Particularly if you have to vent via a sofitt .... as it can get a bit tight. I couldn't get an outlet to fit and had to put a baffled one on the fascia instead - but a real nuisance having to remove new guttering to do it !
Best to measure and get the components rather than a kit. Screwfix sell most of the bits you need. If you're going via a loft and have visits from dormice ... do not get the flexible plastic pipe. It seems to allow a faint trace of the extract odour out of it ... and the little !!!!!!s will turn the pipe into a colander in a few days.
Use the aluminium flexible pipe - no more expensive, and thus far it's resisted their attention on both my kitchen extractor and the bathroom high pressure extract system. All available from TLC if Screwfix don't do it.If you want to test the depth of the water .........don't use both feet !0 -
Many hoods NEED a 5 inch vent
Sorry - wasn't cutting across what you say. Where there's a 5" outlet / manufacturer's spec ... you should obviously not restrict it.
Started my post before yours ... but knocked off for tea part way through. So it sounds as though I was contradicting you ... but not the case. If you want to test the depth of the water .........don't use both feet !0 -
No problem Mikey.
K."It ain't what you don't know that gets you into trouble. Its what you know for sure that just ain't so." Mark Twain0
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