he HEPAClean Compact Air Purifier is most effective in small rooms like kitchens, offices, and bedrooms. It features a 3-stage filtration system, which uses a washable pre-filter to capture larger particles and a long-life HEPA-Type filter that helps capture up to 99% of airborne particles from the air that passes through the filter. The HHT-011 can be placed horizontally or vertically and features 3 settings.No guarantee and no returns. Private sale.