HEPASilent technology leverages electrostatic charge and mechanical filtration to deliver true HEPA performance capturing 99.97% of airborne pollutants including dust, mold, pet dander, and pollen for relief from allergies and asthma

Air quality sensors monitor air quality in real-time and adjust fan speed accordingly when set to auto mode

Medium to large rooms between 300 square feet and 400 square feet. (AHAM rated at 434 square feet.) Such as bedrooms, small living rooms, kitchens and offices

Filter is in fair condition and should last 3 more months at least.  

The key advantage of this machine is that it runs very fast to get the air clean and then throttles down to a slow quiet speed once the air is clean.   Filter holds a disturbingly large amount of junk.   

This thing is built like a tank.  It reminds me of the old HP printers that would last forever because HP made money selling toner.