Austin Air Air Purifier Replacement Filters | Filterbuy
November 6, 2026
TL;DR
Every Austin Air purifier takes one of three filter sizes: standard (HM4xx models), Junior (HM2xx), or the personal "it." Any filter fits any machine in the same size class, and each one lasts up to five years. Genuine filters list from $295 to $695, or $59 to $139 a year. Filterbuy doesn't make Austin Air filters yet, so this guide walks through the genuine options.
Key Takeaways
Start with the model code. Standard units begin with HM4 (HealthMate HM400); Junior units begin with HM2 (HealthMate Jr. HM200).
Filters swap within a size, not across sizes. Any standard filter fits any standard unit built in 1996 or later, so a HealthMate owner can move up to a HealthMate Plus filter.
Expect up to five years per filter. A stale smell or weaker airflow means the carbon or HEPA layer is full.
By Filterbuy's math, a standard filter costs $79 to $139 a year across its five-year life, at November 2026 list prices.
Need a new filter for your Austin Air purifier? The model code on your unit's label tells you which size to buy.
At Filterbuy, we build HEPA-and-carbon purifier filters in our U.S. plants. We don't make Austin Air filters, but building our own has taught us how much fit and media matter, and those lessons run through this guide.
A quality air purifier deserves a quality replacement filter. At Filterbuy, we believe the right fit, reliable filtration, and lasting performance make all the difference. Because cleaner air starts with a filter you can trust.
Which Replacement Filter Fits My Austin Air Purifier?
Austin Air filters fit by size class, not by model name. According to Austin Air's FAQ, every standard filter fits every standard unit made in 1996 or later, and every Junior filter fits every Junior unit. Find the model code on your unit's label and match it in the table below.
Any standard filter fits any standard unit built in 1996 or later; Junior filters fit all Junior units. Prices: Austin Air list prices, austinairsystems.com, November 5, 2026.
Still unsure? Austin Air's Find My Filter tool points you to the right filter in a few clicks.
Pro Tip: Have an Austin Air unit built before 1996? Austin Air says those older machines take the Allergy Machine filter, so check with Austin Air before you order.
What's Inside an Austin Air HealthMate Filter?
A HealthMate filter is a four-stage cartridge that removes particles and odors in a single pass.
Large-particle pre-filter: An outer poly-cotton sleeve catches hair and pet dander.
Medium-particle pre-filter: A second layer stops mold spores and pollen before they reach the HEPA.
Activated carbon and zeolite: About 15 lbs. in standard filters, or up to 6 lbs. in Junior filters, adsorbs odors and chemical gases.
Medical-grade HEPA: Standard filters hold 60 sq. ft. of media and Junior filters hold 30 sq. ft., rated to capture 99.97% of particles at 0.3 microns, the EPA's HEPA benchmark.
Filterbuy's take: more media means a longer life. The combination filters we build for GermGuardian purifiers carry a thin carbon layer and need replacing every 6 to 8 months. Austin Air packs in roughly 15 lbs. of carbon instead, which is how it can rate a filter for five years. The EPA's Guide to Air Cleaners in the Home agrees that carbon filters work best with a large amount of material. Filterbuy's guide to carbon vs. HEPA filters shows how the layers split the work.
How Often Should You Replace an Austin Air Filter?
Austin Air rates its filters for up to five years of around-the-clock use. Pets, smoking, new carpet, fresh paint, and city pollution all wear a filter down sooner. Two signs tell you it's time: a stale smell that keeps coming back, which points to saturated carbon, and weaker airflow, which points to a loaded HEPA layer.
To stretch the filter's life, vacuum all four sides of the outer screen with a brush attachment about once a month. A clear pre-filter keeps dust away from the deeper layers.
What Filterbuy Has Learned Building HEPA-and-Carbon Filters
The carbon usually gives out first. A returning smell tends to show up well before airflow drops.
Not every smell means a spent filter. A sour smell points to saturated carbon, while a musty one points to moisture. Filterbuy's guide to why an air purifier smells helps tell them apart.
Which Austin Air Filter Should You Choose?
Since every standard filter fits every standard unit, choose by the problem you want to solve. Each figure shows the yearly cost over the base HealthMate filter, and Austin Air's filter comparison page covers every version.
Everyday dust and pollen: The HealthMate filter is the baseline, at about $79 a year.
Allergies: The Allergy Machine filter pairs HEPA with HEGA carbon cloth for about $2 more a year.
Wildfire smoke and VOCs: The HealthMate Plus adds potassium iodide–impregnated carbon for about $10 more.
Bedrooms with off-gassing furniture: The Bedroom Machine filter adds HEGA cloth to the full carbon bed for about $30 more.
Maximum gas and chemical protection: The Immunity Machine filter uses four types of granular media for about $60 more.
What Do Austin Air Replacement Filters Cost?
On Austin Air's filter store, genuine replacement filters list from $295 for a HealthMate Junior filter up to $695 for an Immunity Machine filter. Spread over five years, they look less steep, so the Filterbuy team divided each by the filter life.
Filterbuy calculation: Austin Air list price (November 5, 2026) divided by Austin Air's rated filter life of up to 5 years.
Electricity belongs in the yearly cost, too. Researchers in the CLEAN AIR trial estimated that two air cleaners running nonstop use $9 to $30 of electricity a month (Journal of the COPD Foundation). By our math, that's roughly $54 to $180 a year per unit. With a HealthMate filter, one purifier runs roughly $133 to $259 a year.
Austin Air also backs its filters with a prorated warranty. Per its FAQ, a filter that fails within the first two years qualifies for 40% off a replacement, and the discount shrinks to 10% between years four and five.
Pro Tip: One habit from the Filterbuy team: write the install date on the filter frame and keep the receipt, since the warranty depends on both.
Thinking about a third-party filter? Building our own filters at Filterbuy taught us that fit matters as much as the filter material. If a filter doesn't seal, air slips around it unfiltered.
How to Replace Your Austin Air Filter
Swapping the filter takes no modifications, and Austin Air's HealthMate Plus filter page includes a video of the whole process.
Unplug the purifier and move it into open space.
Slide off the outer pre-filter sleeve and set it aside.
Remove the old filter following the owner's manual or Austin Air's video.
Seat the new filter so it sits flush with the housing and seals evenly.
Fit the new pre-filter in the matching color: white for white or sandstone units, black for black or midnight blue.
Plug it back in and run it on high for a few hours, then drop to your usual speed. Keep the unit at least 4 inches from the wall.
Supporting Statistics: What the Research Shows
1. Austin HealthMate Purifiers Helped COPD Patients
Study: In an NIEHS-funded trial, 116 former smokers with COPD ran either two Austin HealthMate HM400 units or look-alike shams for six months.
Result: The active group had fewer flare-ups and symptoms and used less rescue medication.
Filterbuy's read: The benefit came from working filters. Austin Air supplied the units but played no role in the analysis.
2. Indoor VOCs Run 2 to 5 Times Higher
Finding: Common VOCs average 2 to 5 times higher indoors than outdoors and can reach 1,000 times higher during paint stripping.
Filterbuy's read: Your filter's carbon bed adsorbs that gas load until it fills up.
Source: U.S. EPA
3. HVAC Systems Usually Run Less than 25% of the Time
Finding: During heating and cooling season, home HVAC systems usually run under 25% of the time, and they filter air only while the fan is on.
Filterbuy's read: A purifier running around the clock protects one room. In homes with central air, a MERV 13 HVAC filter covers the rest.
Does Filterbuy Make Austin Air Filters?
Not yet. Today, Filterbuy air purifier replacement filters cover GermGuardian Filter B, C, and E purifiers, along with Cut Carbon pre-filters in GermGuardian and Honeywell-compatible sizes.
Running HEPA Purifiers in Every Room? Upgrade to MERV 13
If your home has central heating and air and you run a HEPA purifier like an Austin Air in each room, switch your HVAC filter to MERV 13. The EPA recommends MERV 13, or the highest rating your system's fan and filter slot can handle.
Check your system first. The EPA advises asking an HVAC technician before you upgrade.
Run the fan longer. HVAC systems only filter air while the fan runs.
Find your size. Filterbuy makes MERV 13 air filters to order in 600+ sizes, made in the USA.
As David Clark, the licensed HVAC technician who reviews Filterbuy's technical content, puts it: "The best filter is the highest rating your system can move air through, changed on schedule."
Next step: Find your size in Filterbuy MERV 13 air filters, or set up auto-delivery to save 5% on every order.
Frequently Asked Questions
Is the Austin Air HealthMate Filter the Same as the HealthMate Plus Filter?
Not quite. Both are standard size, so either fits either machine. The HealthMate Plus adds impregnated carbon for stronger protection against VOCs and smoke.
Do I Need to Buy Pre-Filters Separately?
No. Genuine Austin Air replacement filters come with the pre-filter layers built in. Spares cost $34.50 (standard) and $29.50 (Junior).
Glossary
High-efficiency particulate air media that removes at least 99.97% of particles at 0.3 microns.
High-efficiency gas adsorption, a carbon cloth layer in Austin Air's Allergy Machine, Bedroom Machine, and Immunity Machine filters.
A natural mineral that adsorbs certain gases, such as ammonia and formaldehyde; Austin Air calls it mineral-based filtration.
Volatile organic compounds, gases released by paint, cleaners, furniture, and building materials.
Minimum Efficiency Reporting Value, the scale that rates how well an HVAC filter captures particles.
Austin Air®, HealthMate®, and related model names are trademarks of Austin Air Systems Ltd. Filterbuy is not affiliated with or endorsed by Austin Air Systems. Model names are used only to identify compatibility. Prices are Austin Air list prices as of November 5, 2026.