Austin Air's Powerful 4-Stage Filtration
1. An outer filter traps the largest airborne particles, lint and pet hair.
2. The Permafilt™ pre-filter traps smaller particles which have passed through the outer filter, but are still large enough to catch in a non-HEPA filter. These outside layers make your carbon and HEPA filters last much longer, by protecting them from larger particles. So, your expensive filters last longer and you save money.
3. A powerful 15 lbs. of activated carbon/zeolite adsorbs odors, gases, and harmful toxins.
4. Last but not least, the true medical HEPA filter paper removes airborne particles and allergens, trapping an impressive 99.97% of all particles down to 0.3 microns.