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*
** MRSP (Manufacturer's Suggested Retail Price)/ RSP (Retail selling price) is accurate at the time of posting.
^ Annual filter cost is calculated based on filter price and 12 hours of usage. Pricing could vary depending on air quality, usage frequency, and speed.

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)
Airflow speed72 - 400 cfm (122 - 680 m3/h)
Dust free (CADR)
Pollen free (CADR)
Smoke free (CADR)
Humidifying(H) speed
- 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 usage level115 W
Timer/ Scheduler
Auto mode
Air qualityAQ indicator
Filter change indicator
More color options
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty5 years
Email/ Phone support

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

Design And Usability

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 fan speed 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, Coverage, And CADR

Austin Air Allergy Machine coverage
Purifying coverage
1500 sq. ft. (139 m2)
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 the living hall. Compare with other standard Austin Air purifiers, expect equivalent airflow performance and purifying coverage.

Recommended Read

Filters And Performance

Austin Air Allergy Machine 4-stage filtration is excellent for people suffering from asthma and allergies. The first stage filtration consists 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.

Noise And Energy Usage

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 it's within its purifying range. On another note, 132 W power consumption is average for this segment air purifier.

Pricing And Maintainence Cost

Austin Air Allergy Machine MRSP/ RSP
+- 575
Austin Air Allergy Machine annual filter replacement cost
Annual Filter Cost
+- 50
^ 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, but you would also only have to deal with the hassle filter replacement every couple of years.

Austin Air Allergy Machine VS The Challengers

Austin Air

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. It's also the most expensive unit in Austin Air lineup.


  • 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.
Austin Air Allergy Machine

Max Fernandez

A loving father and a dedicated reviewer for airfuji.com with more than 1000 air purifiers under his belt. Max Fernandez is also one of the million patients currently suffering from asthma. Feel free to nudge him if you have any questions.
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