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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

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    • CommentAuthorShevek
    • CommentTimeJan 29th 2014
     
    Can anyone recommend a recirculating cooker hood?

    1. Value for money and probably mid-range on our budget.
    2. Super quiet.
    3. But super high extraction rate.
    4. Washable filter and reasonably priced charcoal replacement filters.
    5. Nothing too modern looking. Simple is good.

    I assume 1, 2 and 3 are contradictory priorities.

    Would we be helping ourselves if we went for a canopy hood and built it into a dense sound-proof cabinet or would it not make enough difference to warrant the effort?

    Are there any other left-field advances in this area that we should consider?

    Note: we're using passive ventilation with heat recovery (Ventive).
    • CommentAuthorShevek
    • CommentTimeJan 29th 2014 edited
     
    Here's my research from Currys' website if you're interested. Think the last one might be a goer.

    ELICA Tender 90 EDS3 - Looks great, super extraction rate, super quiet, but pretty expensive.
    http://www.currys.co.uk/gbuk/built-in-appliances/built-in-cooking/hoods-splashbacks/hoods/elica-tender-90-eds3-chimney-cooker-hood-stainless-steel-17825787-pdt.html

    SIEMENS iQ500 - Not bad but no charcoal filter and extraction rate is a bit low
    £565 - 550 m3/hr - 58 dB(A)
    http://www.currys.co.uk/gbuk/built-in-appliances/built-in-cooking/hoods-splashbacks/hoods/siemens-iq500-lc98bd540b-chimney-cooker-hood-stainless-steel-11502274-pdt.html

    FISHER & PAYKEL HC120DCXB1 - A little bit loud but excellent extraction rate
    £600 - 800 m3/hr - 60 dB(A)
    http://www.currys.co.uk/gbuk/built-in-appliances/built-in-cooking/hoods-splashbacks/hoods/fisher-paykel-hc120dcxb1-chimney-cooker-hood-brushed-steel-10404695-pdt.html

    BOSCH Exxcel DWA07E650B - Good price and quiet but ugly as sin
    £450 - 650 m3/hr - 57 dB(A)
    http://www.currys.co.uk/gbuk/built-in-appliances/built-in-cooking/hoods-splashbacks/hoods/bosch-exxcel-dwa07e650b-chimney-cooker-hood-brushed-steel-11428468-pdt.html

    FISHER & PAYKEL HC60DCXB1 - excellent extraction rate and cheap but a bit ugly and a bit noisy
    £390 - 800 m3/hr - 60 dB(A)
    http://www.currys.co.uk/gbuk/built-in-appliances/built-in-cooking/hoods-splashbacks/hoods/fisher-paykel-hc60dcxb1-canopy-cooker-hood-stainless-steel-black-glass-10491067-pdt.html

    CAPLE SP610SS - excellent extraction rate, very quiet and cheap, but damn ugly
    £450 - 750 m3/hr - 56 dB(A)
    http://www.currys.co.uk/gbuk/built-in-appliances/built-in-cooking/hoods-splashbacks/hoods/caple-sp610ss-chimney-cooker-hood-stainless-steel-21499074-pdt.html

    CAPLE SP610BK - reasonably priced, excellent extraction rate, very quiet but too ugly
    £500 - 750 m3/hr - 56 dB(A)
    http://www.currys.co.uk/gbuk/built-in-appliances/built-in-cooking/hoods-splashbacks/hoods/caple-sp610bk-chimney-cooker-hood-black-21524319-pdt.html

    STOVES ST S900
    £340 - 750 m3/hr - 56 dB(A) - excellent extraction rate, very quiet and cheap, and styling doable! Think I've found our hood.
    http://www.currys.co.uk/gbuk/built-in-appliances/built-in-cooking/hoods-splashbacks/hoods/stoves-st-s900-chimney-cooker-hood-stainless-steel-21404539-pdt.html
    • CommentAuthorShevek
    • CommentTimeJan 29th 2014
     
    The STOVES ST S900 seems almost too good to be true. Does anyone know of a reason why it might be?
    • CommentAuthorjms452
    • CommentTimeJan 29th 2014
     
    Pretty much any hood can recirculate in my experience and once you get to super high flows this does not necessarily translate into great 'filtration'.

    Its not really filtration - it is actually a diffusive process based on the residence time so upping the flow can actually reduce the effectiveness of the (carbon) filters.

    Our existing hood ended up working fine once converted to recirculating with the correct filters.
    See: http://www.cookerhoodfilters.co.uk/ (no connection other than customer)...
    • CommentAuthorShevek
    • CommentTimeApr 4th 2014 edited
     
    Posted By: jms452Pretty much any hood can recirculate in my experience and once you get to super high flows this does not necessarily translate into great 'filtration'.

    Its not really filtration - it is actually a diffusive process based on the residence time so upping the flow can actually reduce the effectiveness of the (carbon) filters.

    Our existing hood ended up working fine once converted to recirculating with the correct filters.
    See:http://www.cookerhoodfilters.co.uk/" rel="nofollow" >http://www.cookerhoodfilters.co.uk/(no connection other than customer)...

    Oh right, that's really interesting, thanks John.

    We have a hood we scored on Freecycle but it's not re-circulating. How do you go about converting them?
    • CommentAuthorEd Davies
    • CommentTimeApr 4th 2014
     
    My understanding from a brief look at this stuff is that to make a hood recirculate you put in a filter and remove/don't connect the output pipe. The filter reduces the flow rate. I suppose some hoods might not have the fitting for the filter but all of the few I looked at seem to. Is that a fair summary?
  1.  
    I think so. The "chimney" above the hood will typically have slotted vents to provide the re-circulation in the event that the output duct is not connected. However, some have knock-out panels or require that you order a different chimney.

    David
  2.  
    We need to finalise the extractor for the kitchen in our new build if anyone has any updates they can add to this thread?

    We are installing an MVHR system and looking to build as air tight as possible. I am assuming that a recirculating cooker hood is the best way to go rather than an extracting version?

    Does anyone have any recommendations for a canopy style hood (the type which is integrated into cabinets above the hob) that are 60cm wide? Charcoal filters seem to recommended for removing smells?

    As we have an open plan design I'm happy to pay a bit more for a quieter unit.
  3.  
    2 tasks for a recirc hood -

    Grease removal (usually by dragging air though a dense metal grill) - same whether extract or recirc
    Smell removal using carbon filters. (On extract you just dump the air outside)

    I suspect you want fast flow for the first but not the second

    At the very expensive end have a look at Berbel. Use Dyson style vortex to spin out the grease, high quality motors for low noise.

    For recirculating they use a large container of loose carbon that can be refilled so less frequent changes and lower cost when you do. For extract they sell a powered insulated vent that opens only when the hood is in use. Due to our design I'm ending up with review but I still think extract is probably better. I've not done the sums but -
    In summer losing the heat is an advantage.
    In winter whilst theoretically you can use the waste heat in reality kitchens usually overheat when cooking so it's still not a major problem. In an airtight house though you probably need to open s window to stop sir being dragged through the Mvhr
    •  
      CommentAuthordjh
    • CommentTimeAug 26th 2015
     
    FWIW, we installed a hood but never use it because I haven't got around to buying the carbon filters yet (or rather I did but the wrong ones arrived and ...). The MVHR seems to deal adequately with the smells although admittedly my wife's cooking is fairly 'well behaved'.
    • CommentAuthorShevek
    • CommentTimeAug 26th 2015
     
    Doubt that'll be doing your ventilation ducts any favours Dave.
  4.  
    @Simon - I had a look at the Berbel hoods. They look amazing, but a bit out of my price range at 1,000 EUR

    It sounds extraction would be a viable option as you don't necessarily need all the heat?
    •  
      CommentAuthordjh
    • CommentTimeAug 26th 2015
     
    Posted By: ShevekDoubt that'll be doing your ventilation ducts any favours Dave.

    Could be. I'll check it in a while to be sure, but I doubt what little grease there is makes it as far as the MVHR terminals.
    • CommentAuthormikrt
    • CommentTimeAug 27th 2015
     
    I have a well sealed house with MVHR. We were advised to use a canopy directed to the utility through some carbon filters. This would keep the heat in the building.

    Unfortunately the carbon filters don't seem to be doing much at all, and the utility does smell during and for a while after frying, and the mrs hangs clothes there to dry sometimes :-(

    I have now decided to vent to outside with 2 auto dampers, one outside and one inside.

    I realise this will unbalance airflow in the building while running, but I figure for probably only an hour or so total a week I can live with it.
    • CommentAuthorborpin
    • CommentTimeSep 7th 2015
     
    Posted By: mikrtI have now decided to vent to outside with 2 auto dampers, one outside and one inside.
    I am of a same mind if I build again. I have a recirculating hood and it is next to useless at reducing the smells of cooking.
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