Now available for the first time, the Austin Air Immunity Machine Replacement Filter allows owners of standard Austin Air purifiers to upgrade to the brand’s most advanced 8-phase filtration system. This next-generation filter delivers the same powerful protection found in the full Immunity Machine unit—just in time for cold and flu season.

Engineered for individuals with heightened immune sensitivity, residents of newly built homes, and anyone exposed to chemical pollutants or airborne viruses in shared environments such as schools, clinics, or offices, this filter transforms standard models into high-performance immune-supporting air purifiers.

The 8-phase system combines eight layers of filtration media, including:

• Large Particle Pre-Filter – captures visible dust and pet hair

• Medium Particle Pre-Filter – traps pollen, mold spores, and smaller allergens

• Four-Part Granular Defense Combo – includes carbon, impregnated carbon, zeolite, and impregnated zeolite to neutralize VOCs, odors, gases, and chemicals

• Medical-Grade HEPA Filter – removes 99.97% of particles ≥0.3 microns, including allergens and fine dust

• Military-Grade HEGA Carbon Cloth – targets viruses and bacteria

Unlike traditional filters that focus primarily on particulate matter, the Immunity Machine Replacement Filter is specially designed to also capture and neutralize gases, chemicals, and ultrafine particles—providing enhanced, long-lasting protection for indoor spaces.

Compatible only with standard Austin Air models (not compatible with Junior models), this upgrade delivers the most comprehensive air filtration available in the Austin Air lineup.