The mod jr is simple to use, low cost to operate, and quieter then other true HEPA air cleaners on the market at this price point. CLEANS MEDIUM TO LARGE ROOMS: Oransi Mod jr HEPA air purifier cleans 878 square feet every 30 minutes for two full air changes per hour. Ideal for kitchens, basements, living rooms, and other large spaces. EASY TO REPLACE FILTERS THAT LAST: One easy to replace filter that purifies your air up to 12 months so you don't need to worry about frequent replacement filters. TRUSTED BY HEALTH EXPERTS: As seen in the National Institutes of Health during PBS American Masters: Dr.Used in the Javits Center temporary COVID field hospital. Energy Star Certified, AHAM Verifide for CADR, CARB Certified Zero Ozone. TRUE HEPA AND ACTIVATED CARBON: Captures viruses, pollen, pet dander, bacteria, dust, VOCs, odors, wildfire and cooking smoke with a high efficiency 3-in-1 prefilter, MERV 17 HEPA filter, and activated carbon layer. Filter efficiency rated 99.97% at 0.3 microns with 234 CADR for capturing the smallest particles. QUIET AND WON'T DISRUPT SLEEP: As quiet as 20 dB, same noise level as whispering 5 feet away. Minimal lights for no sleep disruption. Variable fan speeds and no motor hum thanks to the latest EC motor technology.