My boiler flue is too close to the vent cover for an extractor fan. The engineer who did the boiler service proposed a flue management kit that'd set me back £200+, since I'm not allowed to DIY it. It occurred to me that I could in effect just do the same to the vent outlet, which I could DIY. Would that be compliant? I was hoping to get away with hooded cover like this: https://plumbing4home.com/products/ventilation-air-hooded-non-return-flap-white-outside-duct rotated 90 degrees so the opening points to the left. Otherwise I could put a short length of ducting in.
