Austin Air Allergy Machine Review

Trap in a never ending loophole surrounded by pollutants? Highly sensitive to dust, plant pollen or other seasonal allergens? Regularly stuck with running nose or sneezing? If those are the common symptoms you suffer, Austin Air Allergy Machine HM405 is the perfect solution to you. Catered to allergy sufferers, Austin Air Allergy Machine is designed to stop regular or seasonal allergens from harassing you from your daily life thanks to the one and only HEGA filter (High Efficiency Gas Absorption) that we will touch on later.
± 575 p
     Annual filter ^    
± 50 p
Online price*
Latest Amazon price

Austin Air Allergy Machine Specification

ProductAustin Air Allergy Machine
14.5 x 23 x 14.5 in
(36.8 x 58.4 x 36.8 cm)
Weight33.1 lb (15 kg)
Coverage (up to)1500 sq. ft. (139 m2)
Dust free (CADR)
Pollen free (CADR)
Smoke free (CADR)
Airflow speed72 - 400 cfm (122 - 680 m3/h)
A Annual filter cost ($)+- 50
- Lifespan
- Replacement cost ($)
Large Particle Pre-filter
5 years
HEPA filter
- Lifespan
- Replacement cost ($)
60 sq.ft. True Medical Grade HEPA
5 years
Carbon filter
- Lifespan
- Replacement cost ($)
Activated Military Carbon Cloth
5 years
Ionizer/ Technologies
UV-light/ PCO
Other filter
Medium Particle Pre-filter
5 years
All-in-one filter
- Lifespan
- Replacement cost ($)
Austin Air Allergy Machine Filter
5 years
+- 250
Optional/ Addon
Noise level40 - 65 dB
Power consumption115 W
Timer/ Scheduler
More color options
Auto mode
Air qualityAQ indicator
Filter change indicator
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty5 years
Email/ Phone support

Product image

Austin Air Allergy Machine key features

  • 360° accelerating filtration system
  • 4-stage filtration system
  • [STAGE 1] Large particle Pre-filter
  • [STAGE 2] Medium Particle Pre-filter
  • [STAGE 3] 60 ft. True HEPA filter
  • [STAGE 4] Activated military carbon cloth (HEGA) filter
  • 3 fan speeds
  • Long-lasting filters that could last up to 5 years depending on usage
  • 5 years manufacture defect warranty

The starters

Austin Air Allergy Machine dimension
14.5 x 23 x 14.5 in
(36.8 x 58.4 x 36.8 cm)
Austin Air Allergy Machine weight
33.1 lb (15 kg)
Austin Air Allergy Machine boxy exterior has the exact same dimension with every other Austin Air air purifier at 14.5 x 23 x 14.5 in. Weight is slightly lighter at 33.1 lb, you would still need to rely on the 4 casters to move the air purifier around. Usability is a bit of mix bag; front dial knob fanspeed is super easy to use however, the lack of any practical features such as air quality sensor, auto mode, filter indicator hinder the air purifier overall usability. On to the specification, what’s included in the package is a 4-stage filtration, 5 years all-in-one filter lifespan, 360° progressive Intake System, NRTL (Nationally Recognized Testing Laboratory) recognized, CSA (Canadian Standards Association) and CE (Conformité Européenne) approved, no ozone emitted and 5 years warranty.

Airflow, CADR and everything in between

Austin Air Allergy Machine coverage
Purifying coverage
1500 sq. ft. (139 m2)
Austin Air Allergy Machine airflow speed
Airflow speed
72 - 400 cfm (122 - 680 m3/h)
Austin Air Allergy Machine fanspeed
Powered by the excellent all-round 360° progressive system with 72-400 cfm airflow delivery rate, Austin Air Allergy Machine has an impressive purifying applicable area up to 1500 sq. ft. that can cover almost any sizes of room including living hall. Compare with other standard Austin Air purifiers, expect equivalent airflow performance and purifying coverage.

What’s inside count

Austin Air Allergy Machine Pre-filter
Large Particle Pre-filter
5 years
Austin Air Allergy Machine HEPA filter
60 sq.ft. True Medical Grade HEPA
5 years
Austin Air Allergy Machine carbon filter
Activated Military Carbon Cloth
5 years
Austin Air Allergy Machine other filters
Medium Particle Pre-filter
^ Austin Air Allergy Machine filters/ technologies/ lifespan
Austin Air Allergy Machine 4-stage filtration is excellent for people suffering from asthma and allergies. The first stage filtration consist of outer mesh filter and inner pre-filter that would trap large particles such as pet hair. The 2-stage medium filter would of course capture medium size particles while the 3-stage HEPA filter would trap even smaller airborne particles. Finally Allergy Machine High Efficiency Gas Absorption (HEGA) filter would trap odor and gas based allergens that often linked to household contaminants.

Austin Air Allergy Machine is covered against

Austin Air Allergy Machine VS Dust



Austin Air Allergy Machine VS Pollen



Austin Air Allergy Machine VS Hair

Hair/ Pet hair


Austin Air Allergy Machine VS Dust mite

Dust mites


Austin Air Allergy Machine VS Mold/ Mildew

Mold/ Mildew


Austin Air Allergy Machine VS Pet dander

Pet dander


Austin Air Allergy Machine VS Virus/ Germ

Virus/ Germ


Austin Air Allergy Machine VS Tobacco smoke

Tobacco smoke


Austin Air Allergy Machine VS Chemical



Austin Air Allergy Machine VS VOCs



Austin Air Allergy Machine VS Smoke/ Gas

Smoke/ Gas


Austin Air Allergy Machine VS Odor



Without a doubt Austin Air Allergy Machine 4-stage filtration is highly efficient when take on common and micron size contaminants, allergens, viruses and bacteria. Made possible by ultra-powerful airflow distribution and wide purifying coverage, Austin Air Allergy Machine combined filtration is exceptional in eradicating hair, dust, pet dander, dust mites, fungi, pollen, mildew, mold, spores and germs.  On handling odors and smokes, Austin Air Allergy Machine is also exceptional against cooking odors, radon, ammonia chemicals, VOCs, tobacco and cigarette smokes.

Keep it down

Austin Air Allergy Machine noise level
Noise level
40 - 65 dB
Austin Air Allergy Machine power consumption
Power consumption
115 W
Austin Air Allergy Machine 40 - 65 dB noise is far from subtle and generally not suitable for night use. Without sleep mode or silent mode, the only way to prevent the air purifier from making too much noise is to place it as far as possible so long its within its purifying range. On another note, 132 W power consumption is average for this segment air purifier.

At what cost

Austin Air Allergy Machine MRSP/ RSP
+- 575
Austin Air Allergy Machine annual filter replacement cost
Annual Filter Cost
+- 50
^ Austin Air Allergy Machine replacement filters estimated cost
Austin Air Allergy Machine is not cheap to begin with, the lack of any practical features is a further blow on the air purifier overall value. Filter replacement is another story as Austin Air Allergy Machine offer one of the lowest filter replacement cost in its class thanks to the extra-long filter lifespan. Not only you will save tons of money on the filter replacement, you would only have to deal with the hassle filter replacement every couple of years.

The challengers

Austin Air HealthMate HM400

At a much lower cost, the standard set offers decent enough filtration strength against most common allergens .
Austin Air bedroom machine

Austin Air Bedroom Machine

The ultimate version that comes with 5-stage filtration including 15 lbs. Activated Carbon and Zeolite and HEGA filter. Its also the most expensive unit in Austin Air lineup.

In conclusion......

  • Activated military grade carbon HEGA filter that is great for people that are sensitive to allergens.
  • Consistent airflow with wide purifying coverage.
  • Comprehensive filtration thanks to the trio pre-filter and reliable 60 sq. ft. certified HEPA filter.
  • No off-gassing as the exterior is made entirely from powdered coated steel.
  • Long-life (up to 5 years), low maintenance cost filter.
  • 5 years warranty.
  • Clearly audible noise level that is not great for night use.
  • Lighter but overall still bulky that requires casters support.
  • Hassle filter change from bottom rather than pop out cover.
  • Empty on features. Lacks auto/ sleep mode, air quality sensors, digital screen indicator and timer.
Build quality
Airflow delivery
Particle Filtration
Smoke Filtration

Frequently Asked Questions FAQ

Austin Air Allergy Machine Troubleshooting

Safety Tips

More on Austin Air HM405

Smooth in design with focus on comprehensive filtration, Austin Air HM405 is similar to every other Austin Air air purifier with a standard dimension and weight. Built on powder lined finish steel exterior, the body consist of a 360° progressive filtering intake system supported by the non-fancy 3 dial fan speeds knob. Inside of Austin Air Allergy Machine is the powerful 4-stage filtration system that consist of 2 back to back pre-filters, medical grade HEPA filter and all new High Efficiency Gas Absorption (HEGA) filter. The HEGA filter is an activated carbon cloth that is placed at the last stage of the 4-stage filtration and it has the same filtration quality used in military or hospital. It is extremely effective in handling chemicals, gases and odors and the carbon cloth does not create any dust thus prevent the filter from being cluttered up with existing particles.

Applicable area, airflow, noise level and power consumption

As with most Austin Air air purifier, Austin Air HM405 has an applicable area of 87 m2 (938 sq. ft.) with 2 airflow charges released hourly. Placing the HEGA after HEPA filter enables Austin Air Allergy Machine to remove the most irritant allergens and odors (typically cigarette smoke) that could trigger serious respiratory allergies. At a consistent airflow delivery rate, you can expect a swift purifying speed within the air purifier surrounding. Noise level is at 39.8 dB minimum to 64.5 dB maximum; not great but acceptable, power consumption level is standard at 115 watts.

Final thoughts on Austin Air HM405

Compare with HealthMate series, Austin Air HM405 is more efficient in gases, chemicals, and odors control all because of the inclusion High Efficiency Gas Absorption (HEGA) activated military carbon cloth filter. The additional filter is extremely handy as an allergy or asthma relief typically for people that are sensitive to allergens. We would also recommend Austin Air Allergy Machine to people that are constantly surrounded by smokers so you can breathe more freely.

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