Membrane Solutions MS19 Air Purifier For Home Coverage Up to 825 sq/ft Large Room 4 Stage H13 Ture HEPA Filter, Activated Carbon Air Cleaner. With 3 Fan Speed, Washable Pre-filter, Night Light, Sleep Mode, Timer 2/4/8 hrs, Filter Replacement Indicator. Best Air Purifier For Smokes, Odors, Pets Dander, Dust, Pollen, Mold, Viruses, Bacteria, etc. US Stock! Fast Shipping! Fast Delivery! WHY CHOOSE MEMBRANE SOLUTIONS MS19 TRUE H13 HEPA AIR PURIFIER? Comprehensive Coverage: MS19 True HEPA Air Purifier with two powerful centrifugal fans (while most other air purifiers only have one) delivers clean air at the rating of 110 CFM (187m³/h). Clean 3117 L of air per minute, 9 minutes of clean air volume equivalent to 132ft² of bedroom volume, Ideal for rooms up to 825ft², including living rooms, bedrooms, kitchens, offices and basements. 4-STAGE FILTRATION: 100% Ozone-Free MS19 air cleaner utilizes a 4-stage filtration system, which can effectively removing 99.97% of particles as small as 0.3 microns and air pollut