Review on 🌬️ Rowenta PU3040U0 Air Purifier: True HEPA, Active Carbon & Formaldehyde Filters, up to 243 Sq Ft - White by Tammy Hines

All in all I love these Rowenta filters so this was the last one I bought for a new room in the house. However, after about a month I start to hear a high frequency buzzing. I assume it's the bearing that goes into the circulating motor. This suggests a possible accident with just my unit OR someone skimped on the corners and ordered cheaper motor mounts.