Holmes Mini Tower Air Purifier with Maximum Dust Removal Filter If you're looking for something that's affordable, simple, and compact, this Holmes Mini Tower Air Purifier with Maximum Dust Removal Filter ($45, originally $50) does the job. Customers have left it rave reviews and it's a great choice for small spaces. Image Source: target.com Holmes Mini Tower Air Purifier with Maximum Dust Removal Filter $45 from target.com Buy Now