Extractor fan via existing chimney flu

Kincora2017

Our house is mid terrace and has previously been extended the full width of the house. The kitchen was put in the extension. We’re now thinking of relocating our kitchen to the “middle” room of the house, and possibly breaking out the former back wall of the house to create an open plan kitchen/living/dining area.
Does anyone know of it is possible to use an existing chimney to fit the extractor fan to? This would save having to find a route out either to the front or back of the house via existing floors and ceilings.
Thanks.

Calahonda52

NO, for a variety of reasons.
The first assuming a two story house is that the cold stack effect will not be over come by a extract fan.
The second is that the mixture of grease etc will condense on the walls of the chimney, creating all sorts of biohazard

You could consider lining the flue and fit a Chinese take away type fan on the top of the chimney but the noise for the neighbours would be pretty intolerable, and thats before the seagulls start feasting on the congealed grease on top of the chimney

Lumen

If you have suspended floors you can run a duct under the floor to exit out the back.

Alternatively get a recirculating "extractor" which doesn't require venting to the outside. They're normal now for airtight new builds.

Kincora2017

Thanks lads.

3d4life

Lumen wrote: »

...Alternatively get a recirculating "extractor" which doesn't require venting to the outside. ...

I have experience of these

If you plan to really do real cooking then try to get a real extractor

Lumen

3d4life wrote: »

I have experience of these

If you plan to really do real cooking then try to get a real extractor

They're not all the same. I know someone who does a lot of cooking of quite oily food and loves it. But I think the system cost 5k or something.

monseiur

Is this extractor fan to be connected directly to the cooker hood or is it to service the whole room ?

monseiur

Calahonda52 wrote: »

NO, for a variety of reasons.
The first assuming a two story house is that the cold stack effect will not be over come by a extract fan.
The second is that the mixture of grease etc will condense on the walls of the chimney, creating all sorts of biohazard

You could consider lining the flue and fit a Chinese take away type fan on the top of the chimney but the noise for the neighbours would be pretty intolerable, and thats before the seagulls start feasting on the congealed grease on top of the chimney

This is gross exaggeration (You obviously had your tongue stuck firmly in your cheek) It's a domestic house scenario not the world's largest McDonalds
Most cooker extractors have charcoal or similar filters so the amount of actual grease extracted would be miniscule if any.

3d4life

Lumen wrote: »

They're not all the same. I know someone who does a lot of cooking of quite oily food and loves it. But I think the system cost 5k or something.

Any idea make / model ?

Lumen

3d4life wrote: »

Any idea make / model ?

Take a deep breath.

https://www.siemens-home.bsh-group.com/ie/productlist/cooking-and-baking/hobs/venting-hobs/EX807LX67E#