With the fires and ash in the air out here in SoCal we needed something quick to clean our inside air - this fit the bill.  Great size - and works great!  we noticed the difference in our air immediately.  I take this into the bedroom to clean our air as we sleep - has a night mode on it - less light and quieter with night mode.   Can't wait till next Spring to see how this helps my allergies to citrus and jasmine blooms.