Cookology 110cm Extractor Fan, Built-into Ceiling Island Cooker Hood, Remote & Carbon Filters (White) [Energy Class B]

I needed the extractor to fit into my ceiling, however the joists weren’t the right width for it to fit snuggly, so it now protrudes from the ceiling and we’ve boxed it in. It was loud before we boxed it in but now the floor vibrates above it and you can’t hear anything anyone says if their in the next room. It looks amazing, the design is lovely, however it’s not clear in the instructions whether you have to have the flaps open when it’s in use, if you do and it was in the ceiling, I’m too short to open them without a stool. There’s a 15min timer on the remote which is helpful, and the lighting on it is lovely., it’s just the noise level.