I needed to replace a failing Paralda that was about 9 yrs old. I decided on the BreathSmart Flex, which has the HEPA and could work in the bedroom. It is a bit larger than I expected, should have checked dimensions more carefully. I did get a panel in light color maple look so it does not look bad, but is hard to place due to size. On the low fan it is fairly quiet, similar to quiet white noise. It will definitely work for the size of the space. It will be so much easier to clean than the paralda, which was difficult to vacuum all the fins. I like that the air comes out the top of the machine.
My experience with this company has been wonderful, they are so easy to work with, and give a lot of advice. The HEPA filters in their machines seem to make a huge difference for me with breathing trouble, allergies.