Fan makes noise
So easy to install. Just unpack and plug in.  I plugged into my downstairs bathroom but had to get up in the middle of the night to unplug due to noise heard in upstair bedroom.  I could have closed the bathroom door to eliminate some of the noise.  I plugged back in when I got up in the morning due to coronavirus and proximity to downstairs kitchen to eliminate vapor particles.  It seems to work well in small area (esp when bathroom door is closed).
Rating: 3 stars