Using as a recirculation hood and needed to purchase carbon filters. Looking online everyone said to avoid Stoves as they're too expensive and to get aftermarket ones, couldn't find any after market ones. Tried to get some off espares but they weren't the right fit. Ended up contacting Stoves and they were cheaper than espares ones and very helpful. On lowest level the noise isn't too bad, levels 2 and 3 are quite loud and the booster function is extremely loud. Very easy to attach to the wall although we have a very low ceiling so had to get one of the bits of chimney fascia cut down to fit which wasn't a problem (Stoves don't supply any shorter pieces, it comes with 2x 400mm pieces which can slide over each other to make up to ~750mm high.