Shark Never Change Air Purifier Max is the most modern air purifier yet! It is 2x better odor reduction that guards against odors and releases a fresh scent back into the room. This scent makes the home smelling noticeably fresh. This size is perfect because it takes up little space while looking great and covering 1400 sq ft of area. That's two rooms! The filter is one of the best parts because you do not have to change it for up to 5 years!! That alone saves you up to 300+ on filter costs. Four layers in this machine captures 99.98 of allergen and irritants. There is more. The cleaning sense IQ feature will sense changes in air quality and automatically reacts & improves while giving live updates. I am telling you, this is the best filter you will ever own!