Hamilton Beach 04383 True Air Allergen-Reducing Air Cleaner for $47.00 shipped. Here is a screenshot for your reference. This allergen-reducing air cleaner can be used for rooms up to 160 square feet. It features a permanent HEPA-grade filter that removes airborne allergens. The filter can be vacuumed clean so that there is no replacement filters to buy. Most places have it for about $56.