Helps reduce particles, chemicals, gases, and biological contaminants for more demanding air-quality needs.
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Austin Air Immunity Machine Air Purifier
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Austin Air Immunity Machine Air Purifier (8-Phase Filtration, Austin Air's Most Complete Air Purifier)
at 0.3 microns
HEGA cloth
coverage
(66 dB on high)
The Austin Air Immunity Machine is the most complete filtration Austin Air builds, made for the highest-risk indoor air. It runs an 8-phase system that stacks every tool the brand makes into one sealed steel cabinet: a four-part granular defense bed of carbon, impregnated carbon, and zeolite for gases and chemicals, medical-grade True HEPA for fine particles, and a final military-grade HEGA carbon cloth originally developed for chemical and biological defense.
It's the pick when the stakes are high: a weakened or compromised immune system, serious chemical sensitivity, or an environment where you want both biological and chemical concerns covered at once. If your needs are simpler, the Bedroom Machine gives you HEPA, carbon, and HEGA cloth for less, and the HealthMate and HealthMate Plus cover everyday and chemical air. All are compared below.
How the Immunity Machine Compares: Bedroom Machine vs Immunity Machine
These are Austin Air's two most advanced units, and the only two that carry the military-grade HEGA carbon cloth. They share the same all-steel body, the same 60 sq ft of True Medical HEPA, and the same 5-year warranty. The Bedroom Machine pairs its carbon and zeolite bed with the HEGA cloth for comprehensive, sleep-friendly filtration. The Immunity Machine goes further, adding impregnated carbon and impregnated zeolite in a four-part granular defense bed, for the widest chemical and biological coverage Austin Air offers.
| Bedroom Machine | Immunity Machine THIS MODEL |
|
|---|---|---|
| Best for | Comprehensive filtration & sleep | Highest-risk, immune & chemical |
| Filtration | 5-stage | 8-phase |
| Particle filter | True Medical HEPA (99.97%) | True Medical HEPA (99.97%) |
| Carbon & chemical control | Carbon + zeolite + HEGA cloth | Impregnated carbon + zeolite + HEGA cloth |
| HEGA carbon cloth | Yes | Yes |
| Coverage | 1,500 sq ft | 1,500 sq ft |
| Warranty | 5yr mech / 5yr filter | 5yr mech / 5yr filter |
| Price from | $994.99 | $1,144.99 |
Choose the Immunity Machine when you want everything Austin Air can put in a single unit: the four-part granular defense bed for gases and chemicals, full medical HEPA for fine particles, and the HEGA carbon cloth on top. It's the right call for immune-compromised households, serious chemical sensitivity, or any space where both biological and chemical air quality matter. If you want comprehensive filtration and a unit built for the bedroom at a lower price, the Bedroom Machine shares the same HEPA and HEGA cloth without the impregnated four-part bed.
Don't need this level of filtration? For everyday air quality up to 1,500 sq ft, the HealthMate covers allergens and general odors, and the HealthMate Plus targets chemicals and VOCs. Filtering a small room? The HealthMate Junior line brings core Austin Air filtration to spaces up to 700 sq ft.
Coverage is based on air-change rate and 8-ft ceilings, and varies with layout, ceiling height, and how much you run the unit. Sound levels vary by speed setting.
Is the Austin Air Immunity Machine Right for You?
The Immunity Machine is for people who want the most thorough air filtration Austin Air makes, usually because the stakes are higher than average: a compromised immune system, real chemical sensitivity, or a home where both particles and gases are a daily concern.
It's an especially strong fit if you:
✔ Have a weakened or compromised immune system and want to reduce airborne exposure
✔ Deal with chemical sensitivity, VOCs, or off-gassing from new furniture or renovations
✔ Want a single unit that handles both particles and gases at the highest level Austin Air offers
✔ Are concerned about airborne viruses and bacteria and want deep medical-grade particle capture
✔ Prefer a durable, run-it-24/7 unit over plastic purifiers
Great fit for:
✔ Bedrooms and living rooms up to 1,500 sq ft
✔ Immune-sensitive households and high-exposure environments
✔ Chemically sensitive households that want the widest gas coverage in the line
✔ Homes near traffic, wildfire smoke, or industrial pollution
✔ Allergy and asthma households that also deal with chemicals and odors
What the Austin Air Immunity Machine Removes
Particles & Allergens (True Medical HEPA)
Phase 7 is a True Medical Grade HEPA filter with 60 sq ft of media, certified to capture 99.97% of airborne particles down to 0.3 microns and 99% down to 0.1 microns. That lower 0.1-micron figure is what puts it ahead of a basic HEPA unit, since it reaches into the sub-micron range where viruses and bacteria live:
- Pollen and seasonal allergens, common triggers for allergy and asthma symptoms
- Dust and fine particles, caught by the two prefilters and the HEPA media
- Pet dander, the airborne skin flakes from cats and dogs
- Mold spores, captured before they settle and spread
- Smoke and sub-micron particles, including many airborne viruses and bacteria caught mechanically in the HEPA media
Chemicals, Gases & Odors (Four-Part Granular Defense + HEGA Cloth)
Before and after the HEPA, the Immunity Machine runs more chemical filtration than any other Austin Air unit. Phases 3 through 6 are a four-part granular defense bed: granular carbon, impregnated carbon, zeolite, and impregnated zeolite. Phase 8 finishes with the military-grade HEGA carbon cloth. Together they reach a wider range of gases than plain carbon can hold on its own:
- VOCs and chemical fumes, from cleaning products, furniture, paint, and finishes
- Formaldehyde, off-gassed by new flooring, cabinetry, and furnishings
- Ammonia and nitrogen dioxide, from cleaning agents, pet areas, and traffic pollution
- Everyday and cooking odors, from pets, food, and general household air
- Smoke odor, from fireplaces, wildfire smoke, and tobacco
Good to know: the Immunity Machine captures airborne particles in the size range that includes many viruses and bacteria through its medical HEPA, which works by mechanical filtration. The HEGA carbon cloth is a gas-phase layer that widens chemical and vapor coverage. No air purifier should be relied on as protection against infection or disease.
Key Design Features
8-Phase Filtration System
The reason to choose this unit. Air passes through eight sequential phases: two prefilters, a four-part granular defense bed, medical-grade True HEPA, and the HEGA carbon cloth. Each phase does its job before air reaches the next, so nothing bypasses the filters.
Four-Part Granular Defense Bed
Phases 3 through 6 combine granular carbon, impregnated carbon, zeolite, and impregnated zeolite. The impregnated media is what lets the Immunity reach gases like formaldehyde, ammonia, and nitrogen dioxide that plain carbon holds less well.
Military-Grade HEGA Carbon Cloth
HEGA stands for High Efficiency Gas Arrestance, an activated-carbon cloth originally developed for chemical and biological defense. As the final phase, it adds surface area for lighter chemical vapors and rounds out the widest gas coverage in the Austin Air range.
60 sq ft of True Medical HEPA
A large pleated HEPA area means slower air speed through the media, which lifts capture efficiency and stretches filter life.
360° All-Steel Intake
The unit pulls air from every side of its powder-coated steel housing, which improves circulation and keeps airflow up as the filter loads. It moves up to 250 cubic feet of air per minute on high.
No Plastic Off-Gassing
The all-steel body avoids the plastic smell that cheaper purifiers can add to a room, which matters most for sensitive users.
Simple 3-Speed Dial
One manual dial sets low, medium, or high. Run it low for quiet cleaning at under 50 dB, or high to clear a room fast at about 66 dB. Casters let you move its 47 lb frame between rooms.
Maintenance & Filter Life
Austin Air keeps ownership simple. Instead of juggling several filter schedules, the Immunity Machine uses one integrated filter that you replace as a single unit:
- Filter life: up to 5 years under normal residential use
- Replacement: the entire filter assembly swaps in as one piece, no separate carbon, HEPA, and prefilter to track
- When to replace: when odors start to pass through or airflow noticeably drops
- Routine care: vacuum the outer steel intake and wipe the housing now and then
The Immunity Machine is designed to run continuously, which is the simplest way to keep air quality steady. It draws 147 watts on high, similar to a standard household appliance, and less on lower speeds. Homes with heavy smoke, chemical exposure, or high pollution may need to replace the filter sooner than 5 years.
Replacement Immunity Machine filters are available right here at Pure Indoor Living, and a low-cost standard pre-filter keeps the main filter cleaner for longer.
Frequently Asked Questions
Should I get the Bedroom Machine or the Immunity Machine?
Both are Austin Air's most advanced units, and both carry the military-grade HEGA carbon cloth. The Immunity Machine is the more complete of the two: it adds a four-part granular defense bed with impregnated carbon and impregnated zeolite, so it reaches a wider range of gases and chemicals. Choose it for immune-compromised households, serious chemical sensitivity, or the highest-risk environments. The Bedroom Machine shares the same medical HEPA and HEGA cloth for less, and is the better value if you want comprehensive, sleep-friendly filtration without the impregnated four-part bed.
What is the 8-phase filtration, and what makes it different?
The Immunity Machine filters air through eight sequential phases. Phases 1 and 2 are prefilters for larger dust and debris. Phases 3 through 6 are the four-part granular defense bed: granular carbon, impregnated carbon, zeolite, and impregnated zeolite, which together adsorb odors, VOCs, formaldehyde, ammonia, and nitrogen dioxide. Phase 7 is 60 sq ft of medical-grade True HEPA for fine particles. Phase 8 is the military-grade HEGA carbon cloth. It's the most layered filtration Austin Air builds, which is why the Immunity is the top of the range.
What is the HEGA carbon cloth, and what does it do?
HEGA stands for High Efficiency Gas Arrestance. It's a military-grade activated-carbon cloth, originally developed for chemical and biological defense, that Austin Air uses as the Immunity Machine's final phase. Where the granular carbon bed traps the bulk of gases and odors, the HEGA cloth adds surface area and catches lighter chemical vapors that a carbon bed alone can let slip past. It's one of the two features, along with the four-part granular defense bed, that make the Immunity the most complete unit in the range.
What do impregnated carbon and zeolite do?
Plain activated carbon holds most gases and odors well, but it struggles with a few lighter, more reactive ones. Impregnated carbon is activated carbon treated with a compound that chemically reacts with those specific gases, so the unit can capture formaldehyde, ammonia, and nitrogen dioxide that plain carbon would let slip past. Zeolite is a natural mineral shot through with microscopic pores that trap small molecules like ammonia, and impregnated zeolite adds the same chemical boost. The Immunity Machine blends all four, granular carbon, impregnated carbon, zeolite, and impregnated zeolite, which is what gives it a wider chemical range than the carbon-and-zeolite bed in the rest of the line.
Does the Immunity Machine protect against viruses and bacteria?
Its medical-grade True HEPA captures 99.97% of particles down to 0.3 microns and 99% down to 0.1 microns, which is the sub-micron range where many airborne viruses and bacteria travel. That capture happens mechanically, by trapping the particles in the HEPA media as air passes through. The unit filters the air rather than treating you, so it isn't a substitute for medical protection, and no air purifier should be relied on to prevent infection. What it does do is give you the deepest particle and gas filtration Austin Air offers for a high-risk indoor space.
Is it quiet enough to sleep next to?
Yes. On low the Immunity Machine runs at under 50 dB, quiet enough for most people to sleep beside, and many owners like the steady background sound. On high it's louder, about 66 dB, closer to normal conversation, so most people run it low overnight and higher when they want to clear a room quickly.
How often do I replace the filter, and what does it cost?
The Immunity Machine filter lasts up to 5 years under normal home use, and it replaces as one complete assembly rather than several separate filters. Genuine replacement filters are available here at Pure Indoor Living, and adding a low-cost standard pre-filter helps the main filter last as long as possible.
Does the Immunity Machine produce ozone?
No. The Immunity Machine cleans air by mechanical filtration only: prefilters, granular carbon and zeolite adsorption, True HEPA, and the HEGA cloth. There's no ionizer and no ozone-generating process, which is what you want in a unit built for immune-sensitive users and continuous use.
Does it arrive assembled, and what's the warranty?
Yes. The Immunity Machine ships as a single assembled unit on casters, ready to plug in and run. It's backed by Austin Air's 5-year mechanical warranty and a 5-year pro-rated filter warranty, which is one of the longest coverage terms in the category.
Is this a medical device?
No. The Austin Air Immunity Machine is a residential and commercial air purifier for general indoor air quality. It's not a medical device and isn't intended to diagnose, treat, cure, or prevent any disease or health condition.
Documentation
Let Us Help You Find Your Perfect Austin Air Purifier
The right Austin Air unit usually comes down to two things: the size of your space, and whether your main concern is particles, chemicals, or both.
If you're deciding whether you truly need this level of chemical and biological filtration, or weighing the Immunity Machine against the Bedroom Machine or the HealthMate line, tell us about your space and what you're trying to clear, and we'll point you to the right fit.