This Holmes® Allergen Remover is up to 99.97% efficient in removing allergens such as pollen, dust, mold, pet dander and smoke from the air passing through the filter. It also helps fight common household odors with the power of Arm & Hammer® Baking Soda. Features four speed settings, programmable auto-off timer and filter life monitor. Recommended for rooms up to 418 sq ft, Smoke CADR 270.

Holmes HAP424-U HEPA-type filter removes dust and other irritating particles from your surroundings even reducing odors for breath after breath of unblemished air.

Certified for a 10-by-11-foot room, this Harmony air purifier from Holmes improves the quality and freshness of the atmosphere in your home. The purifier stands upright or lies flat, is quiet in operation, and features three power settings. An optional ionizing function improves performance. The unit uses a HEPA filter to trap 99 percent of typical airborne particles, while an activated carbon filter removes odors from the air. Both filters are accessed through a pop-off cover, and sliding switches control the settings.

The Holmes Harmony Air Purifier can scrub airborne particles out of the air with a High Efficiency Particulate Air (HEPA) filter. Particles of dust, pollen, pet dander, mold spores, and even smoke larger than 2 microns are caught in the filters tiny screens. And there's an ionizing function that helps even smaller motes clump together, so they're big enough to get filtered out. The Harmony Air Purifier is designed for a 180-square-foot room, or about 12 by 15 feet. The unit is a slim oval tower of ivory plastic less than three feet tall, easy to place in an unobtrusive corner of the room.

This Holmes® 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, pollen, mold spores and pet dander. Then, to absorb and eliminate common odors, the filter is fortified with trusty Arm & Hammer Baking Soda. Features three speed settings and optional ionizer. Recommended for rooms up to 120 sq ft, Smoke CADR 76. Replacement filter: HAPF30PDQ-U

This Holmes HAP716-U True-HEPA allergen remover uses true Hepa filtration, which is up to 99.97-percent efficient in removing allergens such as pollen, dust, mold, pet dander and smoke from the air passing through it. Unit features 3 speed settings, optional ionizer, and slim tower design. Recommended for rooms up to 150-square-feet; smoke CADR 100.

This allergen remover uses true Hepa filtration, which is up to 99.97-percent efficient in removing allergens such as pollen, dust, mold, pet dander and smoke from the air passing through it. Unit features 3 speed settings, optional ionizer, and slim tower design. Recommended for rooms up to 81-square-feet; smoke CADR 55. Replacement filter: HAPF300D-U2.