Dear Screwfixers, Wonder if any plumbers, electricians or kitchen fitters could advise me on best way to duct kitchen extractor fan through and existing airbrick in my flat. Should be able to view some pictures from the following link (click them to enlarge): https://www.dropbox.com/sh/js7pw1r0iwnuz09/AADgCDOTftFQxy24bV7YYM_Ga?dl=0 Image 1: Final kitchen plan. Extractor will be installed into the middle wall unit. Image 2: Picture of the same aspect Image 3: Air brick from inside with dims Image 4: Air brick from outside with dims My plan will be to run rectangular manrose ducting flat along the wall, taking 45 degree turns around the column and behind right-hand side wall unit to the centre one for connection with the extractor. Manrose ducting: https://www.screwfix.com/p/manrose-rectangular-flat-channel-white-110mm/14118 I would welcome advice on how to achieve this, specifically how to duct through the airbrick to the outside. It’s a cavity wall so aware it needs to be air tight connection. I’ve seen double air brick ducting adaptors but the dimensions don’t seem to be compatible. Some examples here: http://www.fastlec-pdf.com/product_pdfs/airbricks.pdf https://www.bpcventilation.com/whit...U2g2gbYKRg26XrTsq8NzkjAioPWVehAoaAlmOEALw_wcB Any help on this gratefully received. Many thanks, D
This can be done but you will need to alter the dimensions of the inside vent [I would leave the outside as is and put a solid type tube thro the wall not flexi. The inside vent you will need to make a mounting plate to fit the trunking. The big practical issue is that the extractor fan will not be particularly efficient as it is travelling a] distance and b] round bends, both of which reduce the air flow....you may need to get a more powerful fan somehow. Standard fans generally are just designed to push air through a wall. They all have air flow data so check what your extractor can do first!
Don't know know i missed this thread when you first posted it OP. 3 bends in that run, so it will reduce the ducting distance by 1.5m from the manufacturer maximum ducting distance. As you are in a flat, what floor are you on ? Only asking because if you are on the ground floor, there may be other options.
Be super careful with that vent. Lots of those are made from asbestos. An often there is a kind of loose fill asbestos inside the opening too.
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