Did you buy an extractor the same size or bigger? I’ve just read that the extractor should be larger than the hob as the way induction works means that the steam goes sideways as well as up.
We had one the same size in our old house but rarely used it as it sounded like a jumbo jet. We have one in this house but rarely use it as sounds like a jumbo jet and is next to useless as it doesn’t vent out.
We’re getting the kitchen done now and I’d like one that’s relatively quiet and efficient enough to bother using. The size thing has just added another layer of confusion.