Don't just replace your classroom filter. Upgrade it.
Most schools added the 4-stage HealthMate during the pandemic, and after about five years those filters are due. Now you can drop in the 8-phase Immunity Machine filter and transform the purifier you already own into Austin Air's most protective unit.
The machine still runs. That doesn't mean it's still protecting.
Austin Air filters are built to last up to five years, which is about how long ago most schools deployed purifiers during the pandemic reopening. As a filter fills with the particles, smoke, and chemicals it has captured over the years, it works harder and protects less. The unit keeps humming along, so it is easy to assume all is well — but the clean air your classroom was promised is quietly fading.
Five years is the mark
Pandemic-era units bought in 2020–2021 are right at the end of their filter life now.
A loaded filter falls behind
Once it is full, it can't capture what it no longer has room for. Performance drops gradually and silently.
And you can do better
Filter-due is the perfect moment to upgrade — the same swap can turn a 4-stage unit into 8-phase protection.
One filter upgrade transforms your 4-Stage HealthMate into an 8-Phase Immunity Machine.
The 8-phase Immunity Machine filter is a drop-in replacement that fits the standard HealthMate housing your school already owns. No new machine, no new install — you simply swap the filter and the same purifier now delivers Austin Air's most comprehensive protection. It is the easiest, most affordable way to give a classroom a serious upgrade.
We'll send a new Immunity Machine label for the front.
When you upgrade, we include a new Immunity Machine label for your purifier — so every parent, student, and staff member who walks in can see this classroom is taking the utmost care to protect the people in it.
Immunity Machine Filter
- Turns your existing HealthMate into a full 8-phase Immunity Machine
- Adds a four-part carbon and mineral defense for VOCs, formaldehyde, ammonia, and NO₂
- Adds military-grade HEGA carbon cloth that captures gases and viruses
- Medical-grade HEPA, built to last another five years
- Includes a new Immunity Machine label for the front of the unit
Payment options available
HealthMate Replacement Filter
- Restores your HealthMate to its original 4-stage performance
- Medical-grade HEPA plus activated carbon and mineral filtration
- Captures particles, allergens, smoke, odors, and common chemicals
- Built to last another five years
Payment options available
Both filters fit your standard HealthMate and are designed to last five years. For a room full of students heading into another cold, flu, and wildfire-smoke season, the 8-phase upgrade is the protection we recommend.
Outfitting more than one classroom? Let's talk volume pricing.
Districts that partnered with us during the pandemic can access special volume pricing on replacement filters and Immunity Machine upgrades. The more classrooms you cover, the better we can do — reach out and we will build pricing around your order.
Turn your classroom community into clean-air funding.
Replacement filters rarely made it into the ongoing budget after the COVID funding ran out. There are several ways to fund a classroom filter, and our new Rewards & Loyalty Program is one of the simplest: a teacher or parent shares their unique referral link, and every purchase made through it earns points toward a classroom replacement filter. Visit our fundraising page for the full range of options.
Get your referral link
Join the free Rewards & Loyalty Program and grab your unique link.
Share with your community
Send it to families, friends, and staff, or post it to your class page and socials.
Earn toward a filter
Every purchase through your link earns points you can put toward a classroom filter.
Replacement filter FAQs
How do I know if our filters are due?
Can I really upgrade my HealthMate without buying a new machine?
What does the 8-phase upgrade add over the 4-stage filter?
Do you offer pricing for schools buying several?
How does the referral fundraising work?
Not sure what your classroom needs?
Tell us your unit and how many classrooms you are covering, and our School Support team will point you to the right filter, the upgrade, or a pricing quote.