Cooker Hood Ducting

[Danny Monaghan]

Does anyone know if this kind of ducting is suitable for a cooker hood with

600m2/h extraction:

assume it's so cheap because it's more or less foil on a wire helix?

[Andy Hall]

How long a length? What kind of fan in the extractor?

.andy

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[Richard Geyman]

I've got the same stuff for a 450m3/h extractor, and no problems. As it's

150mm, I'm sure it can probably take plenty more.

Looking elsewhere I was being quoted nearly £100 for a 5m length of 150mm ducting with wall plate!

Richard

[Danny Monaghan]

Andy Hall wrote in news: [e-mail]:

..snip my waffle..

Including the run up the chimney section of the hood, approx 4m with 2

90deg bends. I've no idea if the fan is centrifugal or not I'm afraid (can you tell by looking?). The hood is a Brandt AD229X and no tech spec has been supplied with it, or on the website :(

[Andy Hall]

That should be OK. If you can do the bends using the ducting and curve it rather than using elbows then even better,

Yes. The impeller inside looks like a drum with blades around the edge, rather than like a propeller.

.andy

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[Danny Monaghan]

Andy Hall wrote in news: [e-mail]:

..snip..

Ah! It is centrifugal then - with two intakes, one at either end of the axis.

Cheers Andy

[Brian S Gray]

That sounds fairly steep. Have you looked at the Domus catalogue (available as a .pdf file downloadable from their web site (www. domusventilation.com look under 'ducting') and then asked a builders merchant to quote.

(If you know the fan performance, the catalogue also explains how to calculate the suitability of different types of ducting.)