Austin Air Immunity Machine Replacement Filters

Coverage varies by model — check the product specifications above for the rated room size. As a general rule, all units perform best when running below their rated capacity, which reduces noise and extends filter life.

Austin Air filters are rated for 5 years under normal residential use — and often last longer when running below the rated coverage capacity. The long filter life is a direct result of the large carbon bed (6.5–15 lbs depending on model): more carbon means more capacity before saturation. Replacement filters are available on our filters page.

Austin Air units have 4 speed settings. Speed 1 is quiet enough for sleeping. Speed 2 produces a consistent low hum that most people find unobtrusive. Speed 3 is suitable for daytime use. Speed 4 is intended for rapid air changes in emergency situations — wildfire smoke events, high-pollen days — not for standard overnight operation.

No. This unit uses only mechanical filtration — no ionizer, no UV, no ozone generator. It is safe for people with asthma, chemical sensitivity, and other respiratory conditions where ozone is a known irritant. This is a firm design standard across the entire Austin Air lineup.

Yes. Austin Air and Airpura units are used by patients with asthma, allergies, and chemical sensitivity. The True HEPA captures particle-class triggers and the activated carbon addresses VOCs, odors, and chemical compounds. No ionizer, no ozone — safe for respiratory conditions. For MCS specifically, the HealthMate Plus or Airpura C600 have the most relevant specifications.

Yes — and it's recommended. Austin Air units are built for continuous operation. The motors are rated for it and many customers run them year-round without issues. Continuous operation also gives you the best air quality results: the air is cycled more frequently, keeping particulate and VOC levels consistently low. Running the unit continuously at a lower speed is better than running it intermittently on high.

Austin Air units ship directly from the manufacturer in Buffalo, NY. Orders typically ship within 2–3 business days. Standard delivery to most of the continental US is 5–10 business days. You will receive a tracking number once your order ships. Large units may ship via freight — if so, we will contact you to arrange a delivery window.

Austin Air units carry a 5-year mechanical warranty on parts and labor from the date of purchase. The warranty covers manufacturing defects and mechanical failure under normal residential use. As an authorized dealer, Fresh Home Air honors the full manufacturer warranty. Contact us at support@freshhomeair.com for any warranty claims.

We accept returns within 30 days of delivery for units in original condition. Contact us at support@freshhomeair.com to initiate a return. Return shipping is the responsibility of the customer unless the unit arrives damaged or defective. Units that arrive damaged should be reported within 48 hours of delivery with photos.

Yes. No ionizer, no ozone, no UV exposure to room air. The Austin Air HealthMate was specifically studied at Johns Hopkins for use in children's homes — the clinical research involved families with young children. These units are safe for continuous operation in homes with children and pets. They are in fact commonly deployed exactly for this purpose.