YodhrinForge Posted Sunday at 09:25 Share Posted Sunday at 09:25 As I go down the list of Stuff I Need To Know, I keep running into little niggles like this where the info I can find through searching is unsatisfying. I'm aiming for an EnerPHit-ish retrofit of an old stone cottage, obviously that will include MVHR and equally obviously that means Extract Hood Bad...at least from a temperature/air balance perspective. The alternatives seem to be either picking an MVHR unit with an extra port for a cooker hood and some kind of boosting compensation mode for when it's running, but I'm toiling to find a reasonably priced one that also has the other features I'd like - and honestly I'm not all that comfortable directing even pre-filtered greasy air into my whole house ventilation system - or a recirculating hood which has implications for air quality. I've seen several compact MVHR units when researching options for ventilating my garage workshop, but am I right in assuming nobody has thought to combine something like that with a cooker hood to provide a self-contained extracting-heat-recovery-cooker-hood-thingumy? Or are my hesitations about the usual methods unjustified and I should just go with the typical wisdom? Link to comment Share on other sites More sharing options...
Conor Posted Sunday at 09:33 Share Posted Sunday at 09:33 Just get a recirculating hood. The mvhr extract point in your kitchen will do the best. It works really well and I do not miss a big extracting hood at all. If air quality is a big concern, get an induction hob rather than gas (get one anyway as they are better!) 2 Link to comment Share on other sites More sharing options...
JohnMo Posted Sunday at 09:36 Share Posted Sunday at 09:36 7 minutes ago, YodhrinForge said: The alternatives seem to be either picking an MVHR unit with an extra port for a cooker hood and some kind of boosting compensation mode for when it's running No don't mix cooker hood with MVHR. Recirculation cooker hood job done. 9 minutes ago, YodhrinForge said: ventilating my garage workshop dMEV fan or two? Link to comment Share on other sites More sharing options...
Mike Posted Sunday at 13:20 Share Posted Sunday at 13:20 3 hours ago, YodhrinForge said: I'm not all that comfortable directing even pre-filtered greasy air into my whole house ventilation system A recirculating hood is advisable, but note that there is a European 'Grease Filtering Effectiveness' classification that requires hoods to be rated from G (<=45% effective as removing grease) to A (>95% effective). Manufacturers tend to keep quiet about it, but it's usually buried in the specs. Bosch, Neff, Miel & Berbel all have B rated models (>85% effective), but Ikea has the only A rated that I've come across so far. Link to comment Share on other sites More sharing options...
Nick Laslett Posted Sunday at 16:26 Share Posted Sunday at 16:26 I posted some links on this topic in this earlier discussion. A recirculating hood is the general consensus for the most straightforward solution when you have MVHR. You can still have direct extract to the outside, but there are a number of other factors you will have to consider. Link to comment Share on other sites More sharing options...
Dreadnaught Posted Monday at 09:45 Share Posted Monday at 09:45 20 hours ago, Mike said: Ikea has the only A rated that I've come across so far. Here is the one from Ikea that is A-rated for "Grease Filtering Efficiency class" … https://www.ikea.com/gb/en/p/underverk-built-in-extractor-hood-stainless-steel-50392326/ Link to comment Share on other sites More sharing options...
YodhrinForge Posted Monday at 20:15 Author Share Posted Monday at 20:15 10 hours ago, Dreadnaught said: Here is the one from Ikea that is A-rated for "Grease Filtering Efficiency class" … https://www.ikea.com/gb/en/p/underverk-built-in-extractor-hood-stainless-steel-50392326/ Thanks for the link and to everyone for responding. Dearie me though, 380 bob is three times the price of the induction hob that'll be going underneath it lol. Still it seems like a poor place to try skimping to save money so I'll have to suck it up I suppose. On 19/01/2025 at 09:36, JohnMo said: dMEV fan or two? A bit more of a headscratcher than it seems as I'm intending to run an occasionally somewhat business-esque woodworking shop inside, meaning A; I need to think about managing sound so I don't end up with neighbours on the warpath, and B; I need to consider the pattern of air movement inside the space to maximise the efficiency of airborne particulate filtration. I think I'll probably need to bite the bullet and get a small ducted unit. Link to comment Share on other sites More sharing options...
JohnMo Posted Monday at 20:29 Share Posted Monday at 20:29 12 minutes ago, YodhrinForge said: business-esque woodworking shop inside Need proper ventilation and filtration then. Business-esque prices also. Link to comment Share on other sites More sharing options...
YodhrinForge Posted Monday at 20:38 Author Share Posted Monday at 20:38 2 minutes ago, JohnMo said: Need proper ventilation and filtration then. Business-esque prices also. I'm hoping that my planned collection system and DIY filter box will mean airborne particulates will be minimal enough that I'll get a decent lifespan out of the ventilation filters, but yeah every time I look around a corner on this project there's another bugger sucking his teeth, tutting, and holding out his hand for more money Link to comment Share on other sites More sharing options...
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