Recirculating ceiling kitchen extractor
Discussion
I need to get an extractor which doesn't interfere with sightlines like our current bin type extractor.
The peninsula which the hob is in sits in the centre of the old part of the kitchen. Above it are joists which run to the old outside wall so previously it could be ducted outside fairly easily.
The new extension to the kitchen is vaulted in front of that and the joists that ran to the outside wall now run into a large steel beam. As the beam has a downstand of about 100mm I don't want to run a duct under it.
This seems to rule out any option of ducting and means I'm stuck with recirculation.
Are there any decent options out there?
The peninsula which the hob is in sits in the centre of the old part of the kitchen. Above it are joists which run to the old outside wall so previously it could be ducted outside fairly easily.
The new extension to the kitchen is vaulted in front of that and the joists that ran to the outside wall now run into a large steel beam. As the beam has a downstand of about 100mm I don't want to run a duct under it.
This seems to rule out any option of ducting and means I'm stuck with recirculation.
Are there any decent options out there?
The main advantage of extract hoods is the removal of water vapour. Recirculating type will not do this.
It can be a pain to design and install, but having an efficient extract system will make a LOT of difference to the home.
I ended up ducting mine up through the bedroom (office) above and out of the roof. Also has the advantage that the 6" in line fan is in the loft, so most of the noise is away from your head when standing at the hob.
It can be a pain to design and install, but having an efficient extract system will make a LOT of difference to the home.
I ended up ducting mine up through the bedroom (office) above and out of the roof. Also has the advantage that the 6" in line fan is in the loft, so most of the noise is away from your head when standing at the hob.
Edited by Paul Drawmer on Wednesday 8th May 12:37
I'll have to look at downdraught options. The current gas hob is above a set of drawers so i'll have to see what depth is required from them.
If I vent from the floor, it'll have to run about 5m before it gets outside. Is that going to be short enough to make any difference? If I could have got it upstairs to the loft from a ceiling extractor, i'd would have gone for that. I've already got an inline fan ducting from the bathroom through there which works well.
If I vent from the floor, it'll have to run about 5m before it gets outside. Is that going to be short enough to make any difference? If I could have got it upstairs to the loft from a ceiling extractor, i'd would have gone for that. I've already got an inline fan ducting from the bathroom through there which works well.
A lot will depend on the ducting. If rigid, a straight run with a decent centrifugal extractor, you will be fine. If you have space, you can use a larger bore, with greater diameter fan running at lower rpm, which should make everything even quieter. If building custom extraction, make sure that:
- you can access any hidden fan and electrics for maintenance/replacement.
- the controls are somewhere easy to find.
- you still have grease traps etc in pace.
Building your own setup sounds daunting, but means you can do interesting stuff like automation so that it automatically comes on when the hob does, auto extracts if humidity levels get to high etc etc.
- you can access any hidden fan and electrics for maintenance/replacement.
- the controls are somewhere easy to find.
- you still have grease traps etc in pace.
Building your own setup sounds daunting, but means you can do interesting stuff like automation so that it automatically comes on when the hob does, auto extracts if humidity levels get to high etc etc.
You can of course run ceiling extraction using false ceiling, which could also house things like lights, speakers and other fun stuff. Something like below, but the false ceiling actually running to an outside wall, and hiding the duct. Again, you could use a custom fan setup if an extractor hood will not fit, but I am sure that plenty would do, even if the box sits bit proud of the ceiling.
Still no further forward with this however I'm still without a kitchen so haven't got to that point yet!
Definitely useless ducting, it's nearly 7m to the nearest outside wall and requires a bend in the duct.
I'm stuck with recirculation. Anyone bought one of the recirculating only ceiling extractors from the likes of Luxair or similar? I'm going to need 1000 cu m3 due to room size.
Definitely useless ducting, it's nearly 7m to the nearest outside wall and requires a bend in the duct.
I'm stuck with recirculation. Anyone bought one of the recirculating only ceiling extractors from the likes of Luxair or similar? I'm going to need 1000 cu m3 due to room size.
There are three main issues to deal with here
1) water vapour
2) fat and oil vapour
3} cooking odours
1) modern kitchens are pretty dry places and a bit of water vapour might not be a problem anyway, and is easily disposed of with a ventilation fan somewhere convenient if it is.
2) this is a problem in most kitchens especially so if a lot of frying is done. As long as the unit you choose has a large stainless steel mesh area and good airflow you should be ok.
3) this can be dealt with by a carbon filter, but any such filter will reduce the airflow through the grease traps, so whether you need one or not depends on how smelly your cooking is and how much that bothers you. Again a ventilation fan will help.
1) water vapour
2) fat and oil vapour
3} cooking odours
1) modern kitchens are pretty dry places and a bit of water vapour might not be a problem anyway, and is easily disposed of with a ventilation fan somewhere convenient if it is.
2) this is a problem in most kitchens especially so if a lot of frying is done. As long as the unit you choose has a large stainless steel mesh area and good airflow you should be ok.
3) this can be dealt with by a carbon filter, but any such filter will reduce the airflow through the grease traps, so whether you need one or not depends on how smelly your cooking is and how much that bothers you. Again a ventilation fan will help.
Edited by singlecoil on Wednesday 11th September 08:56
singlecoil said:
In that case you will be looking for an extractor with a large inlet surface area with stainless steel mesh grease traps, and a similarly large carbon filter. In the installation you will need to provide an equally large, unrestricted outlet area.
Can you recommend any? I'm having trouble trying to find something that will provide decent levels of recirculation. The kitchen is fairly open at 7x6m so i'm having to look at high extraction (recirculation in effect) rates. I had thought £500 should cover it but Luxair seem to be the only ones offering nearly 1000m3 power and i'm looking at over £1100 for one! As most extractors seem to recommend a fairly low hob to extractor height, how well do ceiling extractors work when theyre probably over 1.50m above the cooking area?
The further the collection surface from the source of oil, vapour and odour the more powerful a fan you will need and the larger the surface area needs to be. The people who are advocating external extraction are right. One of the major advantages of an external system is the very low back pressure the fan has to work against.
If external venting is out of the question then my solution to your problem (and it is a problem when you are using a wok and frying steaks) would be to construct a ceiling mounted 'pod' and fit it with more than one extractor so as to get a really large surface area. The pod would need to provide large air outlets and that air should be directed away from the ceiling so as to not create grease-marked areas of paintwork around it.
As to make, I expect I would use Bosch units, the sort that are designed to go into constructed canopies.
If external venting is out of the question then my solution to your problem (and it is a problem when you are using a wok and frying steaks) would be to construct a ceiling mounted 'pod' and fit it with more than one extractor so as to get a really large surface area. The pod would need to provide large air outlets and that air should be directed away from the ceiling so as to not create grease-marked areas of paintwork around it.
As to make, I expect I would use Bosch units, the sort that are designed to go into constructed canopies.
Gassing Station | Homes, Gardens and DIY | Top of Page | What's New | My Stuff