• Air purifier with space-saving tower design for rooms up to 180 square feet.
• Washable pre-filter; 3 speed settings; optional ionizer; CADR of 116 for smoke.
• HEPA-type filter removes up to 99-percent of airborne particles as small as 2 microns.
• Filter enhanced with baking soda to eliminate odors; filter-change indicator light.
• Product Built to North American Electrical Standards.
• Filters: Any Holmes AER1 Series, Holmes HAPF30D-U2 HEPA Type, or Holmes HAPF300D-U2 TRUE HEPA Filter.

The Holmes HAP424-U HEPA-Type Tower Air Purifier ------------------------------------------------ This space-saving tower air purifier works two ways to freshen and clean the air in your home. First, its Hepa high-efficiency filter helps remove airborne particles such as smoke, dust, , mold spores and pet dander. Then, to absorb and eliminate common odors, the filter is fortified with trusty arm and hammer baking soda. Features three speed settings and optional ionizer. View larger Recommended Filters ------------------- Any AER1 Series Filter or Holmes HAPF300D-U2 TRUE HEPA Filter or Holmes HAPF30D-U2 HEPA Type Filter and a Holmes Arm and Hammer Carbon Filter Features -------- The purifier is designed for a 180-square-foot room, or about 12 by 15 feet. The unit is a slim oval tower less than three feet tall, which makes it easy to place in an unobtrusive corner of the room. There are two control knobs--one for the three power settings, and one to turn the ionizer on or off. An indicator light lets you know when the filter needs changing. The outside of the unit can be cleaned with a damp cloth. The air inlet grill can be washed in hot soapy water (not dishwasher-safe); it should be completely dry before being replaced into the unit. The top air outlet can be swept clean with a small, soft brush. 3 Speed Settings ---------------- Choose from 3 cleaning speeds to keep the air fresh and pure inside your home. Select a lower speed while your at home for continued purification with less ambient noise. Select a higher speed while away from home for maximum purification. Optional Ionizer ---------------- Negative Ions bind with airborne smoke, dust, and to form larger particles that are more easily captured by the filters. When turned on, the Ionizer will make a soft, but audible, crackling sound. This is normal and indicates the Ionizer is working. Available in: Smoke Grabber, en Remover, Total, Performance Plus, and Odor Eliminator View larger Filter Reminder Dial -------------------- A light will indicate when filter service is needed. This ensures maximum air purifier performance. AER1 Filter Series ------------------ * en Remover: True HEPA filtration removes up to 99.97% of airborne ens. Ideal for y sufferers. Captures ens and pollutants such as mold, dust and pet dander that may cause ing and sneezing. * Smoke Grabber: Triple layer protection specially formulated with Arm & Hammer Baking Soda, Carbon and Zeolite to remove smoke odor. HEPA-Type filtration effectively removes up to 99% of smoke and pollutants. Helps reduce pollutants associated with second-hand smoke. * Odor Eliminator: 10x the odor control with Carbon, Zeolite and Arm & Hammer baking soda. For household odors such as pet odors and cooking smells. * Total Air with Dust Elimination: For an overall fresher, cleaner home. HEPA-Type Technology removes up to 99% of airborne pollutants. Traps and locks 30% more dust and particles from your home than a standard filter. * Performance Plus: True HEPA with Industry leading 99.97% filtration. Captures ens and pollutants such as mold, dust, dust mites, debris, pet dander and smoke.