Austin Air FR405 Filter Replacement Pack replaces all four filters that come with the Allergy Machine Air Purifier (HM405). Includes the main filter assembly (True HEPA filter, HEGA carbon cloth, and medium-particle pre-filter), plus the large-particle outer pre-filter. Removes allergens and other airborne particles, plus odors, smoke and gases from indoor air. Austin Air Allergy Machineâ„¢ HEPA/HEGA Filter Replacement Pack (FR405) replaces all four filters that come with the Austin Air Allergy Machineâ„¢ (HM405). The Allergy Machine's 4-stage filtration system is designed for best all-around protection from allergies and asthma. The system integrates military-grade carbon cloth with true, medical-grade HEPA to clean air of the smallest airborne particles and chemical gas contaminants to become HEGA (High Efficiency Gas Absorption). Included in the Allergy Machineâ„¢ 4-Stage Filter Pack are: Stage 1 - Large Particle Permafilt Pre-Filter - removes particles easily seen by the eye (dust, hair, pet dander) Stage 2 - Medium Particle Pre-Filter - removes small to medium-size particles (pollen, molds, other spores) Stage 3 - 60 sq. ft. of Certified HEPA - removes allergens, bacteria, viruses, and other particulates: 99.97% of all particles larger than 0.3 microns, 95.0% of particles larger than 0.1 micron Stage 4 - Military-Grade HEGA Carbon Cloth - absorbs more gases, odors and chemical contaminants Because you see the pre-filter through the air cleaner's grille, choose the Black filter pack for Black-Silver-Blue units or the White filter pack for Sandstone-White units.
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