Ducting extractor hob on a kitchen island to outside wall

[CJER]

10 minutes ago, saveasteading said:

Hadn't thought of that.  yes we should do that. It will restrict flow to some extent but we must try.  But it would be best if the appliance has an automatic shutter, which is what I meant in your second query.

 

No, in terms of having a draughty hole in the room.

 

Wow. You won't get much kit for that.

Is that simply a fan unit with heat exchanger and no ducting? Ive seen them and expect that the expelled air is drawn straight back in and the intake air is sucked straight back out.

I think a back draft damper/non return valve is quite normal for extractors as it will open when the air is pulled down and close when off?

 

from what our architect explained the MVHR venti fluxo stops heat loss, again its quite technical to me but have a look at the venti fluxo website.

 

its expensive but apparently a very good piece of kit, i still dont quite understand it!

[JohnMo]

I wouldn't bother with the MVHR unit you propose but install one of these in you kitchen, utility and bathrooms

https://ebay.us/m/ROuJpj

 

If your dry room windows have trickle vents replace with these

https://www.shop24glasgow.co.uk/en/search?controller=search&s=AERECO

 

If they don't have install something like this

https://www.heatrecoverydirect.com/products/s-p-em-hy-humidity-controlled-air-inlet-install-100mm?variant=49866952540487&country=GB&currency=GBP&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&gad_source=1&gad_campaignid=22034401125&gbraid=0AAAAApOCirjcUNbeNqKiRFAf35BF6ArLV&gclid=CjwKCAjw687NBhB4EiwAQ645dsrORFKnBkTQ2Q9IRY8v-_DuJgE6HbJuPLAFz-T3LlMUipNQsgvICRoCNUwQAvD_BwE

 

Then you will a humidity sensing ventilation system