Introducing the new Alen 350 air purifier from Alen Corporation. Combining performance with affordability this is the perfect unit for a bedroom or office. Quiet and efficient the Alen 350 air purifier cleans rooms up to 800 square feet though allergy sufferers will want one unit for every 400 sq feet to achieve at least 4 air changes per hour. With the Alen 350 you get HEPA filtration at a cost much lower than comparable models. Wall mountable easy to maintain with replacement filters that wont drain your wallet are just a few of the features that make this our most popular air purifier.