Austin Air HealthMate (B400)

A US-built steel purifier with a very large carbon, zeolite and HEPA filter rated for five years, and an NIH-funded asthma trial. It publishes no CADR; HouseFresh measured about 160 cfm, far below its 1,500 sq ft claim. About $845.

Best for A buyer who wants a filter-only machine with a big carbon bed and a five-year filter, mainly for gases and odors, and who values a US-built steel case over quiet or a room rating they can check.

Our rating: Fair (3.2 of 5)
Price range: Premium
Verified marks: Listed by CARB as a mechanical air cleaner (HealthMate HEPA Plus, HM400)
Size: Steel unit, 14.5 x 14.5 x 23 in, 47 lb; no CADR is published, HouseFresh measured about 160 cfm, and Austin Air’s Amazon title says it covers up to 1,500 sq ft
Made in: Built in Buffalo, New York (Austin Air)

approx. $845

See it on Austin Air’s site → (opens in a new tab)

We are not affiliated with Austin Air. This link goes to the maker’s own page, with no tracking code. How we're funded.

Also sold at Amazon ($845), Walmart ($845), Red Vacuums ($845) .

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How we evaluated it

How it scores Our rating, metric by metric Fair, 3.2 of 5

Filtration 30% of the rating 3 of 5

No CADR is published and AHAM has no entry, and HouseFresh measured about 156 to 160 cfm, which suits about 240 sq ft by our rule, not the 1,500 sq ft in Austin Air’s Amazon title.
Adds nothing to the air 20% of the rating 4 of 5

CARB lists the HM400 as mechanical, but in 2010, and Austin Air says it has no ozone or ionizer; we found no test of what its carbon, zeolite and permanganate insert gives off.
Independent testing 20% of the rating 4 of 5

An NIH-funded trial of 225 children used the HealthMate and HouseFresh bought one and measured it, though Austin Air supplied the trial’s units at reduced cost and CARB is a paid certification.
Trust 10% of the rating 3 of 5

We found no recall, Prop 65 notice or lawsuit, but its page says “clinically proven” for asthma where the trial found no change in symptoms, and the 1,500 sq ft claim has no test behind it.
Running cost & value 20% of the rating 2 of 5

About $845 for about 160 cfm is about $5.3 per CFM, with a $395 filter every 5 years and about $164 a year in power at top speed.

The rating, 3.2 of 5, is the weighted average of these scores. See how we rank air purifiers and our standard.

Where to buy Stores and the prices we saw 3 stores

Amazon (opens in a new tab) approx. $845. Black, model B400. Sold and shipped by Austin Air Systems, the maker, through its Amazon storefront.
Walmart (opens in a new tab) approx. $845. Black, model B400B1. Sold and shipped by ORIXFORCE LLC, a third-party seller on Walmart's marketplace, not by Austin Air or Walmart.
Red Vacuums (opens in a new tab) approx. $845. A specialty vacuum and air purifier dealer. Listed as the HM400 Healthmate, model B400, in four colors at $844.99.

Prices as we saw them on October 23, 2026. They change often. These links carry no tracking code and earn us nothing.

What it’s made of What touches your food, water, skin or air 4 materials

Steel housing with a 360-degree perforated intake and a baked-on powder coat finish
Four-stage filter: a large-particle pre-filter, a medium-particle pre-filter, over 780 cubic inches (up to 15 lb) of activated carbon and mineral-based (zeolite) media, and 60 sq ft of HEPA material (what the HEPA fiber is made of is not stated)
The 2011 asthma trial describes the unit’s insert as carbon, potassium permanganate and zeolite; Austin Air’s page does not list the blend
Three-speed centrifugal fan on a speed switch; no ionizer, UV, sensor or app

Who tested it What each test found, and who paid for it 6 tests

Independent Lanphear et al., Cincinnati Children’s Hospital (NIH-funded; Austin Air supplied the units at reduced cost) 2011

A double-blind randomized trial of 225 children with asthma exposed to secondhand smoke. Homes got two working HealthMate units or two inactive ones. Children with working units had 42 fewer unscheduled asthma visits (p = 0.043) and a 25% fall in particles over 0.3 µm against 5%, but no significant change in symptoms, exhaled nitric oxide, air nicotine or cotinine. Open ↗ (opens in a new tab)
Independent HouseFresh (buys its test units; earns affiliate income) February 16, 2026

Bought the HealthMate Standard (B400B1). It took 52 minutes to clear incense smoke from a 728 cubic foot room (an estimated PM1 CADR of 156 cfm, 160 cfm at top speed in its spec box; 77 cfm at its one speed under 45 dBA), about 42 to 61.5 dBA, 61 to 148 W. Its VOC reading fell from 433.65 to 50.52 over the following hours. Its spec box also lists an AHAM PM2.5 (dust) CADR of 154 cfm with no source; we found no current AHAM listing for the model. Open ↗ (opens in a new tab)
Independent HouseFresh VOC guide (buys its test units; earns affiliate income) August 30, 2026

In its VOC removal tests a do-it-yourself AC Infinity carbon fan build (16 lb of carbon, no particle filter) beat every other purifier it tested, including the HealthMate, which it names its best for most people for VOCs. It notes the HealthMate’s particle removal matches much smaller units. Open ↗ (opens in a new tab)
Independent RTINGS (buys its test units; earns membership and affiliate income) February 11, 2026

Tested the smaller HealthMate Junior, not this model: a measured PM1.0 CADR of 36 cfm and 37.3 to 54.2 dBA. It calls the Junior’s particle filtration very poor and notes its large carbon load. Open ↗ (opens in a new tab)
Paid certification CARB (certification; Austin Air pays the lab) October 14, 2010

Listed as Mechanical (HM400, order G-10-105), so it passed the state’s ozone limit. It says nothing about particle removal. Open ↗ (opens in a new tab)
Maker’s own test Austin Air (maker)

Says its “Certified HEPA material” captures 99.97% of 0.3 µm and 99% of 0.1 µm particles, and that the unit is CSA approved. It names no lab for the HEPA figures and publishes no CADR. Open ↗ (opens in a new tab)

Who paid, and why it matters

Independent The tester took no money from the maker for it: a consumer group, a journalist, a university or a regulator.
Paid certification An outside lab or certifier tested or listed it, and the maker paid for that.
Maker’s own test A lab report or certificate of analysis the maker commissioned and published.

A certification is a floor, not a verdict: it checks what its program checks and nothing else. We weigh tests by someone with no stake in the result most.

What people ask Worries raised online and elsewhere, and what we found 7 questions

Is it “clinically proven” for asthma?: Austin Air’s page says it is clinically proven to help reduce asthma symptoms and asthma-related emergency visits. The study behind that, Lanphear 2011 (opens in a new tab), used the HealthMate and was funded by the NIH; Austin Air provided the units at a reduced cost and, the paper says, was not involved in study design, data interpretation or writing. It found 42 fewer unscheduled visits but no significant change in symptoms, and the authors called for more research. See do air purifiers improve health.
Does it really cover 1,500 sq ft?: Austin Air’s Amazon title says so and no test is named. HouseFresh (opens in a new tab) measured about 156 to 160 cfm, which suits about 240 sq ft by our two-thirds rule and about 170 sq ft at five air changes an hour.
Is it too loud and slow for particles?: Austin Air’s Amazon title calls it “Quiet”. HouseFresh measured about 42 dBA at the lowest speed and 61.5 dBA at the highest, and a slow clearing time because the thick carbon bed restricts airflow. It called the machine overkill for dust and pollen but the best it tested for gases and VOCs. RTINGS found the smaller Junior’s particle rate very low.
Is “medical grade” more than marketing?: Austin Air uses “medical grade” for its HEPA material. openFDA lists no 510(k) clearance under the applicant name Austin Air (searched 2026-10-23), and no lab is named for its HEPA figures.
Does it give anything off? Austin Air says no off-gassing.: We found no test of what its carbon, zeolite and permanganate insert releases, and HouseFresh reported no odor. We could not confirm the claim either way.
What do Reddit users say?: RedditRecs (opens in a new tab), which summarizes Reddit comments, shows 78% positive from 18 users. They praise the five-year filter and the metal build; its summary lists no cons, though a few commenters call it pricey. One owner on r/AirPurifiers says their first unit dates from 2006 and has no smell.
Does the filter contain PFAS? Some HEPA media uses PTFE.: Austin Air does not say what its HEPA media is made of, and we found no published PFAS test of purifier filter media from any maker. We could not confirm either way.

Why we chose it What put it on our list 4 points

CARB lists Austin Air’s HealthMate HEPA Plus, model HM400, as Mechanical (notified 2010-10-14, order G-10-105). Austin Air’s current model is the B400. HouseFresh’s test tables pair the HM400 with the B400 it bought, and a retailer listing does the same; Austin Air does not say so itself.
The filter is large: Austin Air says it holds 60 sq ft of HEPA media and up to 15 lb of activated carbon and mineral media (over 780 cubic inches). HouseFresh calls it the largest carbon load among nearly 100 purifiers it tested, and in its VOC removal test it came second only to a do-it-yourself carbon fan rig.
A randomized trial funded by the US National Institutes of Health gave 225 children with asthma either two working HealthMate units or two inactive ones. It found 42 fewer unscheduled asthma visits in the children with working units, though no significant change in symptoms.
Parts and warranty are clear: a replacement filter is $395, built to last 5 years under normal home use (about $79 a year); a pre-filter is $34.50. There is a 5-year machine warranty, a 5-year pro-rated filter warranty and a 30-day trial.

Trade-offs What to weigh before you buy 4 points

Neither the product page nor the owner’s manual gives a CADR, an airflow or a noise figure, and AHAM’s directory has no Austin Air entry. HouseFresh measured about 156 to 160 cfm at top speed, which suits about 240 sq ft by our two-thirds rule, and about 61.5 dBA and 148 W at that speed. Austin Air’s Amazon title says “covers up to 1,500 sq ft”, with no test behind it.
The HEPA rating is for the “material”, from an unnamed source, not the assembled filter. CARB’s listing dates from 2010.
It costs about $845, weighs 47 lb and has a steel case. HouseFresh counts about $164 a year in power at top speed all day, and says the thick carbon bed is why it clears particles slowly.
Austin Air says the HealthMate is “clinically proven” for asthma. The trial behind that found fewer unscheduled visits but no significant change in symptoms, and its authors said more research was needed.

What to know Details worth knowing first

The HealthMate is an old design and a plain one: a steel tower that pulls air in from all sides through two pre-filters, a deep bed of carbon and mineral media and a HEPA layer. It is controlled by a three-speed switch, and Austin Air says it has no ionizer. CARB’s list files the model as mechanical, which is what our air purifier guide looks for.

Its argument is the filter. Austin Air says it holds up to 15 lb of carbon blend and lasts five years, which is a very different offer from a thin carbon layer changed each year. HouseFresh, which bought one, found it second only to a do-it-yourself carbon rig in its VOC test and calls it the machine for gases and odors. See indoor pollutants for what particle filters do and do not remove.

Its weakness is airflow. Austin Air publishes no CADR, and HouseFresh measured about 160 cfm, a room of about 240 sq ft, not the 1,500 sq ft its Amazon title claims. It is also loud at top speed and costs about $845. The NIH-funded trial on its page found fewer unscheduled asthma visits but no clear change in symptoms, so “clinically proven” says more than the study did. Ask Austin Air for a CADR before you buy.

What we checked Each claim, and how sure we are of it 5 checks

How Austin Air HealthMate (B400) measures up against our air purifiers criteria
What we checked	What we found
True HEPA Maker’s claim	Austin Air says its “Certified HEPA material” is rated to capture 99.97% of 0.3 µm particles and 99% of 0.1 µm particles. This describes the material, and no lab or report is named.
No ozone (CARB listing) Verified	CARB’s list has Austin Air HealthMate HEPA Plus, model HM400, as type Mechanical (order G-10-105, 2010). HouseFresh’s review pairs the HM400 with the B400 it tested. Austin Air also says there is no ozone and no ionization.
Right size (CADR) Verified	No CADR, airflow or room rating from Austin Air, and no entry in AHAM’s directory. HouseFresh measured about 156 to 160 cfm at top speed: about 240 sq ft by our rule.
Carbon for gases Verified	Austin Air says up to 15 lb of activated carbon and zeolite (over 780 cubic inches). HouseFresh calls it the largest carbon load it has tested, and in its VOC test it came second only to a do-it-yourself carbon fan rig.
Running cost and noise Verified	Filter $395, rated 5 years; pre-filter $34.50. HouseFresh measured about 42 to 61.5 dBA and 61 to 148 W. Austin Air states no noise figure.

What the labels mean

Verified We opened an independent record that confirms it: a certifier’s listing, a regulator’s list or a lab report. It is linked under Sources.
Maker’s claim The maker says so on its own page or label. We read it but found no independent record.
Not verified We looked and could not confirm it, or the maker does not say. Treat it as unknown.

Sources Where our facts come from 14 sources

Austin Air HealthMate product page: price, filter, warranty and claims. Maker’s page. Open ↗ (opens in a new tab)
Austin Air replacement filters: prices. Maker’s page. HealthMate filter $395. The standard pre-filter ($34.50) is on page 2 of the list. Open ↗ (opens in a new tab)
Austin Air owner’s manual (2025). Maker’s page. Safety, speeds and care. It has no airflow, noise or CADR figures. Open ↗ (opens in a new tab)
CARB list of certified air cleaning devices (search for Austin Air). Certifier or regulator listing. HealthMate HEPA Plus (HM400) is type Mechanical, order G-10-105. The list is one long table with no link for a single model. Open ↗ (opens in a new tab)
AHAM Verifide directory (search for Austin). Certifier or regulator listing. A search tool with no link for a single listing. A search for Austin returned no listing on 2026-10-23. Open ↗ (opens in a new tab)
Lanphear et al. 2011, Pediatrics: HEPA air cleaners and asthma visits (PMID 21149427). Test report. The full text names the unit (Austin Healthmate), the NIH grant, and Austin Air’s reduced-cost supply of the units. The abstract does not name the brand. Open ↗ (opens in a new tab)
HouseFresh: Austin Air HealthMate review. Test report. HouseFresh bought the unit and earns affiliate commissions. Open ↗ (opens in a new tab)
HouseFresh: best air purifiers for VOCs (August 2026 update). Test report. Its VOC removal tests rank a do-it-yourself carbon build above the HealthMate. HouseFresh buys its units and earns affiliate commissions. Open ↗ (opens in a new tab)
RTINGS: Austin Air HealthMate Junior review. Test report. Tests the Junior, not the full-size HealthMate. Open ↗ (opens in a new tab)
RedditRecs: Austin Air HealthMate on Reddit. Independent source. A third-party site that summarizes Reddit comments with software and earns Amazon affiliate fees. The samples are small. Open ↗ (opens in a new tab)
Amazon listing for the HealthMate Standard (B400). Independent source. The title says “Covers Up To 1,500 sq ft” and “Quiet”; price $845.00 on 2026-10-23. Open ↗ (opens in a new tab)
Red Vacuums listing: Austin Air HM400 Healthmate, Model B400. Independent source. A retailer page, used only to pair the HM400 name with Model B400. It is not a statement from Austin Air. Open ↗ (opens in a new tab)
openFDA 510(k) search: applicant Austin Air. Certifier or regulator listing. Returned no matches on 2026-10-23. Open ↗ (opens in a new tab)
California AG Prop 65 notice search: Austin Air Systems. Certifier or regulator listing. No matching records on 2026-10-23. CPSC’s recall search also returned none for Austin Air. Open ↗ (opens in a new tab)

Alternatives Other options to compare 3 options

IQAir HealthPro Plus XE About $1,200, with a separate carbon cartridge of about 5 lb, published filter prices and noise by speed, and also no CADR. HouseFresh measured about 213 cfm on the older model with the same filters.
Oransi Mod+ About $699, with an AHAM smoke CADR of 363 and a HEPA and carbon filter in one, replaced yearly.
Levoit Eleva 500X About $260, with an AHAM-listed smoke CADR of 301. The whole machine weighs 12.9 lb, so its carbon filter is far smaller, and its HEPA filter lasts up to 2 years. It is new: Amazon lists it as first available on 2026-10-18.

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