Pachifig1 year ago000I have just bought the Air 4000. Does it also make such howling noises in automatic or low mode? (as soon as the speed is increased, the fan drowns out the howling noises)Show in original language (German)Stealthsome10 months ago000I feel the same way.Were you able to find out anything?Show in original language (German)Comment1 commentJörgheinz1 year ago • purchased this product000purchased this productI can't confirm that. We run the appliance in various modes without it getting particularly loud.Show in original language (German)Comment