Go on, accuse us of being perfectionists. We've worked hard enough for it.To make sure that our ranghoods are really rust-proof, we spray them with a fine brine mist for 24 hours. If they survive that, we heat dodecanoic acid under the hoods – to the point that clouds of smoke are produced. If the thick smoke clears in a short time to leave pure, clean air, the rangehood can really claim to be "Bosch in every detail", and you can safely take it home with you.
In addition, insulation and a low-noise motor make them so quiet that you and your guests will barely hear a thing.