HiAfter much conflicting advice from a number of people I thought I'd go after some more from you all :)I need to install a cooker hood. The purpose of this is to:1) Remove smoke/steam etc from the kitchen2) Ventilate the kitchen: kitchen/diner gets too hot when/after cooking.The hood will sit a fair distance (about 3m vert+horiz) from the outside wall, but directly on the (as yet unchecked) wall in front of the chimney flue.The comments I have had are1) There is no point in having 3m venting as it just doesn't work and is ugly. Should just do recirculating with carbon filter.2) Recirculating no good at reducing heat. Should either vent or recirculate plus add a separate fan in the kitchen.3) Separate fan doesn't work well as it doesn't extract from where the heat/smoke is produced. Should vent. Consider adding additional fan in vent to increase power.4) Adding additional fan problematic as cannot control from hood.5) Throughput with recirculation less than with venting due to filter obstruction.In addition I was wondering if there is any point in venting to the chimney flue. Possible plus is the there may be a little draw from the chimney (even without a fire), and it would be a lot more attractive. Possible -ve is that smoke would just fall back down the chimney or vent would not cope, so it would be pointless.I would really appreciate any helpful comments anyone has on these options, especially if any of the arguments are fallacious.Thanks in advance.Amos

Recirculating will achieve neither. It will reduce smells to some degree, but that's all. All the heat, and more importantly the water vapour, stay in the kitchen.This is not very far. Our vent has a total run of 2.5m and works great.IMO recirculating hoods are only just very slightly better than nothing. Venting is far, far better.The quality of the hood makes a huge difference to how well it extracts. We bought a twin fan hood from Elica, which works much, much better than our old Baumatic hood used to.I'd recommend using a venting hood, and installing the biggest diameter duct you can. 5" is much better than 4".I wouldn't consider that as an option - too many variables, and unlikely to work.

I got all mine from Their cataloguedoesn't cover their entire stock so here're the part numbers and prices(exc. VAT) for my stuff:PVC693WH Connector for 150mm=D8(ID) pipe =A33.40PVC696WH Pipe Fastener to suit 150mm=D8 pipe =A32.20PVC690WH 90=B0 bend (PVC) to suit 150mm=D8(ID) pipe =A312.00PVC1200-6WH 150mm=D8 rigid PVC pipe, 2m length =A310.50Free delivery for orders >=A310.(Note: 90=B0 bend looks quite pricey so I may have bought thatelsewhere.. BES?)I bought the outlet plate (gravity flaps) from Screwfix() - atthe time of purchase it didn't feature in the paper catalogues.. thismay have changed now.I did quite a bit of searching round to get the best prices -admittedly this search was limited to the Internet (me being a lazyarse and all) and the local sheds. You might be able to pick upsomething cheaper from the 'specialists'.MathewP=2ES. Incidentaly, looking at both the BES and FansDirect product codesit would appear that it's pretty much all manufactured by Domus( whose catalogue...

Cooker hoods: how to vent or not to vent?

Jun 19, 2005 30 Replies

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Andy Hall 21 years ago

... but smooth interior is a good choice because you can create much slower bends than are typical for solid ducts.

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Grunff 21 years ago

I used aluminium duct from BES (125mm). They also do a 150mm.

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Mark 21 years ago

If you select "Installation" on the left hand (index) then "Ventilation" on the pop-up menu and finally "Ventilation, Ducting and Accessories". Skip all the rectangular stuff at the top and the circular ducting starts near the bottom of the page.

Hope this helps.

Mark.

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Mark 21 years ago

You mean the stuff with a spiral wound wire?

I use this and it seems OK (it's well stretched out though).

Mark.

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Christian McArdle 21 years ago

It absolutely trashes the airflow, though.

Christian.

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Mathew J. Newton 21 years ago

I got all mine from

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Their catalogue doesn't cover their entire stock so here're the part numbers and prices (exc. VAT) for my stuff:

PVC693WH Connector for 150mm=D8(ID) pipe =A33.40 PVC696WH Pipe Fastener to suit 150mm=D8 pipe =A32.20 PVC690WH 90=B0 bend (PVC) to suit 150mm=D8(ID) pipe =A312.00 PVC1200-6WH 150mm=D8 rigid PVC pipe, 2m length =A310.50

Free delivery for orders >=A310.

(Note: 90=B0 bend looks quite pricey so I may have bought that elsewhere.. BES?)

I bought the outlet plate (gravity flaps) from Screwfix

formatting link

- at the time of purchase it didn't feature in the paper catalogues.. this may have changed now.

I did quite a bit of searching round to get the best prices - admittedly this search was limited to the Internet (me being a lazy arse and all) and the local sheds. You might be able to pick up something cheaper from the 'specialists'.

Mathew

P=2ES. Incidentaly, looking at both the BES and FansDirect product codes it would appear that it's pretty much all manufactured by Domus

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whose catalogue is well worth downloaded for the item lists/descriptions and back pressure figures.

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