[Closed] Kitchen extraction - for islands...?

Get a downdraught extractor, that either has a pop up bit or some sort of grilled area that a fan sucks through? Ducting through the floor to the outside.

Bora.com

Never watched a Eurosport ad for the last 5yrs. Bora!

We put a combined hob and extractor in. Last year. New house. So presumably current regs. In fact it was signed off only this year. Ours is a recirculating one so all contained within the unit beneath. Grease filters in the intake, charcoal filters down by your feet where the air comes back out. It works very well.

As an aside, I'd be surprised if that advice about regs is correct. I wanted a recirculating one because I had a focus on air tightness and wanted to avoid a hole in the house. I met no resistance around building control on this.

We have one of these, but not bought from them. Cheaper than a dedicated hob with downdraft.

Need to loose about 1/3 of a base unit but works well. The light option is an added bonus.

https://www.appliancesdirect.co.uk/p/eiqchdd60/electriq-eiqchdd60-downdraft-extractor

Is the problem the extraction or the light? Seems to me that some sort of dangling light above a cooker might not be ideal (gets grease on it and gets hot).

However, you are paying your architect to design compliant solutions so I'd be asking them...

Is this true? surely they must pass building control or they wouldn’t exist

they're fine, and work well.
We had a Neff elevating type one, which extracted via ducting under the kitchen floor to an air brick outside,.

DrP

I am an economist by training, so will avoid answering the questions you actually ask but instead answer ones that I can. I hope that they are still relevant, however, and are based on our experience of some of these questions two years ago when building our house.

Firstly, is your hob going to be electric/induction, or flame? My wife far prefers flame, so was happy to do that, but this does restrict what you can do with downdraft/hob-based extraction. When you read the manufacturers' installation instructions you will see that, effectively, they cannot be used with naked flame due to distance requirements. When we discussed this with a number of retailers selling them, and from whom we had sought advice, they skirted the issue and shrugged their shoulders.

Given that our house was being built with MVHR, we could cope with a recirculating fan only. This is ceiling mounted, but low profile and hung at a height that does not get in the way, either of views or heads, but still accessible. A cheap option it is definitely not, but this Miele hood has performed very well and looks stunning in the build. This solution was not a problem for building control 2 years ago.

I wouldn't get a downdraft one...They're a triumph of form over function.
I didn't want a massive hooded extractor when we had our hob put in a island, so we got a Neff one that is installed in the ceiling. It protudes down about 10cm in an "upside down island"...very unobtrusive and very powerful and quiet.

If I was capable of posting pics, I'd show you!

I have a remote fan in the ceiling void and a grid in the ceiling above the cooker.  It vents to the outside

By 'lantern' do you mean a light or a lantern roof'? If the latter I understand the difficulty but fail to see why a lantern roof precludes a hob on the island.

We've just installed a Siemens induction job with built in extractor in a kitchen island. It works just like the ads, we're impressed! 😁

i seem to recall that BC want to see ventilation.
Our builder suggested putting a nothingy bathroom extractor in the wall to tick the box, and then doing whatever we liked inside.

We didnt bother with the bathroom extractor idea, and have a recirc one only. BC didnt seem to care as we have 4 veluxes and some massive bifolds.

I think I might have helped raise this topic in the other thread discussing gas burners/ovens.

We have an Island with gas hobs and an overhead extractor and it is a poor design/layout IMO.

IIRC the guy who came to "fit" the cooker said the hood has to be within a maximum height above a Gas hob (there is some limited height adjustment), due to the potential for asphyxiating gas fumes, so he didn't recommend raising the hood higher.
And (I assume) it has to be above rather than adjacent to because those fumes will rise straight up.

Obviously this is more of an issue with an island than with a cooker up against the wall.

Those with high/ceiling mounted extractors, you don't seem to indicate what hob type(s) you are using (gas/induction/other?), or is that just my misreading?

Ours is a recirculating one and as mentioned above we have a bathroom style extractor mounted up high too, all fitted by the previous owners as the easiest way to achieve reg's compliance...

I suppose all of this means induction hobs have less stringent requirements on any extractors positioning and performance? As they are only there to get rid of the smoke from your overenthusiastic fry up and not a potentially deadly/explosive gas leak?

TBH this is all helping to convince me that induction is really what I want/need in the future, it's easier to clean, easier to lay the kitchen out and we can have more discrete extraction options...

we had gas hobs and this extractor:

it's pointlessly expensive. The ex wanted it.
meh

DrP

Those with high/ceiling mounted extractors,

Yep, induction. No idea what the rules are for gas.

We had a few demos of downdraft one when we were looking and you could see that very little of the steam (used for the demo) went into them (some were better at full whack but then were noisy) IMHO you're paying a lot for the gubbins to make them go up and down

By lantern I mean big skylight thing so there is no ceiling above the island to fit an extractor, and the advice is down draft ones don’t pass building control. Hence I’m asking for others experience because it doesn’t sound right. We can’t move the lantern or the island.

We haven’t decided on the hob but likely induction.

Room is going to be approx 5.5m by 8m.

We barely ever use the extractor in our current kitchen because it is so noisy. So I also want quiet extraction or we won’t use it

By lantern I mean big skylight thing so there is no ceiling above the island to fit an extractor, and the advice is down draft ones don’t pass building control. Hence I’m asking for others experience because it doesn’t sound right. We can’t move the lantern or the island.

I'm pretty certain that there is no requirement to have a cooker hood. You *do* have to have some extraction from kitchens and bathrooms (which can be a simple through the wall thing or a centralised system in a modern house). Recirculating cooker hoods filter out the grease and remove smells with carbon filters (rather than taking a lot of warm wet air and dumping it outside). If you want to fill your house with grease and cooking smells that's up to you - it's not part of building regs.

What he's probably getting at is that you need ventilation and a downdraft hood in an island will be recirculating and won't fulfil that role - so you'll need a separate extractor fan (in the wall) that does go to outside to control moisture levels.

From almost bitter experience, the building control regs in Scotland do not "allow" a downdraft extractor fan. We had a picky building inspector who was going to make us cut a whole in the wall to install an extractor fan even though we have a super powerful in hob extractor that is ducted to outside and does something like three times the air flow that was required in the regs. Our architect told us that he was right but they had been hoping to get away with it. Grrr.

Thankfully, he changed his mind after talking to his colleagues and "interpreting" the regs.

What Tj did. Louvered panel in ceiling, fan in floor void, duct go outside wall. Much cheaper than any of the purpose built ones and not ever in the way.

I think you have an over zealous architect, I’d challenge the advice. We’ve just finished renovating and had BC all over us, but no problem with a downdraft induction hob in island. We could not go above due to a beam.
Elica Tesla switch hob is amazing, albeit a bit expensive.

Discussion had with architect - they are still maintaining downdraft extractors are rubbish and will not meet building control. Either the hob needs to be on a wall for extraction, or a ceiling extractor needs to be used, which isn't possible due to the location of the roof lantern.

Not sure where to take this now....going to talk to a kitchen designer next.