- Genuine Austin Air FR444 — not an aftermarket copy
- Fits the Immunity Machine
- Full 8-phase media — HEPA + HEGA + carbon/zeolite
- Up to 5-year life — Black or White to match your unit
The Austin Air Immunity Machine Replacement Filter brings the power of our most advanced 8-phase filtration system to your existing standard model purifier. Engineered for individuals with heightened immune vulnerability, those living in new construction homes, or anyone exposed to modern chemical pollutants and viruses in high-traffic spaces like classrooms, clinics, and shared offices, this replacement filter upgrades your current unit to next-level protection.
Both filter variants offer the same filtration performance and internal media, with the color option allowing you to match the appearance of your unit. Lasts for 5 years under normal use.
Available Filter Options:
- Black (for Black and Midnight Blue units)
- White ( for White and Sandstone units)
Full Product Details
Austin Air Immunity Machine Replacement Filter (FR444)
The FR444 is the genuine Austin Air replacement filter for the Immunity Machine—Austin's most advanced 8-phase filtration system. It restores the full media stack (Medical-Grade HEPA, HEGA carbon cloth, and a four-part carbon/zeolite bed) so your unit returns to its original, most-comprehensive performance. This is a genuine Austin Air filter (not an aftermarket copy).
What's in the filter
A single cartridge carrying the Immunity Machine's full 8-phase media: large- and medium-particle pre-filters; a four-part granular bed of granulated carbon, impregnated carbon, zeolite, and impregnated zeolite for gases and VOCs; Medical-Grade True HEPA; and a HEGA carbon-cloth stage for ultra-fine contaminants.
Compatibility — does it fit my unit?
- Genuine part number: FR444
- Fits: Austin Air Immunity Machine
- Colors: Black (for Black & Midnight Blue units) and White (for White & Sandstone units)—identical media; color only matches your cabinet
- Not interchangeable with the HealthMate (FR400), Plus (FR450), or Bedroom Machine (FR402) filters—the Immunity's 8-phase filter is unique to this unit
When to replace it
Austin Air rates the filter for up to 5 years under normal residential use (pro-rated 5-year filter warranty). Replace sooner with heavy smoke, chemical, or dust loads.
Why choose the genuine filter
- Exact fit and a proper pressure seal, so all the air passes through the media
- The complete 8-phase media stack, including the HEGA cloth and four-part carbon bed—not a reduced substitute
- Keeps your Austin Air warranty intact
Frequently asked questions
How often should I replace it?
About every 5 years for a typical home; sooner with heavy exposure.
What's included?
One complete 8-phase Immunity Machine cartridge, in Black or White.
Can I put this filter in a standard HealthMate to upgrade it?
The FR444 is designed for the Immunity Machine. If you're looking to add the 8-phase media, check that your cabinet is the Immunity Machine before ordering.
Does the color affect performance?
No—Black and White have identical media.
Free U.S. shipping on orders over $99 and 30-day returns, subject to our return policy. This filter is for the Austin Air Immunity Machine.
