Am looking a kitchen fit and there is a problem with the extractor hood duct route. The hood will be on an internal wall, I am lowering the ceiling height so can run duct work above but the only place to vent to outside is on the wall opposite. The problem being that there is a large window and not alot of room to core drill for the vent. Hope this makes sense up till now? If I come to the side of the window to avoid the lintel there will be a run of duct work of about 4 meters. Is this too much and should it be run in metal or will I get away with the plastic stuff? Any advise as always most welcome.
if you are putting a false ceiling in, you could knock it into the old ceiling to raise it over the lintel. 4m is long, but ducted is better than not. Just use big pipes, not the flexible plastic ones. Rectangular 5" stuff.
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