A Walmart-exclusive offer, the MA-40 Value Pack Bundle includes a free replacement filter ($59.99 value) that adds up to 5 months of filter life. Every package comes with the bestselling MA-40 air purifier with one True HEPA H13 filter inside, and an extra replacement filter for FREE. The MA-40 Air Purifier is one of the best air purifiers introduced to the market in the category. It blends style, and technology, and quality long-term air cleaning. Its higher grade of HEPA filters cleans the air in a room up to 1,600 square feet in 1 hour, 840 square feet in 30 minutes, living spaces or bedroom.