Austin Air Allergy Machine Air Purifier (HM405)

For Allergy and Asthma Relief in Mid-Size Rooms

  • A comprehensive air cleaning solution for people with allergies and asthma, providing effective filtration of common allergens and asthma triggers (e.g., pollen, dust, mould spores, pet dander), as well as other harmful airborne pollutants, chemicals and gases
  • Exclusive HEGA technology provides added protection in environments where tobacco smoke, moulds or cooking oils/odours are present
  • Long-life combined HEPA/carbon filter provides excellent value for money
  • Ideal for use in humid or damp environments such as kitchens and basement areas (e.g., rec rooms, dens or bedrooms), as well as in nurseries and greenhouses

Austin Air Allergy Machine - Product Description
Austin Air Allergy Machine - Filtration System
Austin Air Allergy Machine - Operational Details
Austin Air Allergy Machine - Construction and Measurements
Austin Air Allergy Machine - Accessories and Other Details
Austin Air Allergy Machine - Customer Reviews
Austin Air Allergy Machine - Replacement Filters

Austin Air Allergy Machine Air Purifier
click here for replacement filters

Austin Air
Allergy Machine

Price: $779.99 CAD

Out of Stock, no ETA

Austin Air logo


The Austin Air Allergy Machine (HM405) is designed for allergy and asthma sufferers who are looking for a comprehensive air cleaning solution for medium-sized spaces. It effectively removes many common allergens and asthma irritants (e.g., pollen, dust, mould spores, pet dander), as well as other harmful airborne pollutants, chemicals and gases. In addition to its standard HEPA filter, the Austin Air Allergy Machine uses an exclusive HEGA (High Efficiency Gas Absorption) filtration system incorporating technology originally developed by the military for use against chemical warfare. The military carbon cloth in the HEGA filter has a larger carbon surface area, making this air purifier ideal for controlling tobacco smoke. It is also less susceptible to clogging from use in damp or humid environments, making the Austin Air Allergy Machine a perfect choice for handling mould issues in mid-size spaces. As an added bonus, the HEGA filtration system makes this air purifier extremely lightweight – a full 10 pounds lighter than the Austin Air HealthMate.

The Austin Air Allergy Machine features a Permafilt pre-filter that is designed to be easily vacuumed from the outside of the unit, making this air purifier simple to maintain and eliminating costly 3-month pre-filter changes. The Austin Air Allergy Machine uses a combined medical-grade HEPA and military activated carbon cloth filter that only needs to be replaced once every five years. Unlike granular carbon, the woven carbon cloth used in this air purifier does not release any carbon dust as air passes through it. The Austin Air Allergy Machine also features a perforated 23 gauge steel, 360 degree air intake housing with over 5 square feet of intake area for exceptional air gathering capability, three fan speed settings, and a louvered air flow output directed to one side from the upper deck.

The Austin Air Allergy Machine is perfect for humid or damp environments such as kitchens and basement areas (e.g., rec rooms, game rooms, dens and bedrooms), as well as plant rooms, greenhouses and nurseries. It is also an ideal choice for those who wish to operate an air purifier at a lower fan speed to minimize noise while maintaining high effectiveness. With a baked-on powder-coated finish and four colours to choose from, this unit blends easily into almost any décor.

Looking for replacement filters for this unit?   See Austin Air Allergy Machine filters
Not what you’re looking for?   See other Austin air purifiers
Want to compare Austin air purifiers?   See Austin air purifier comparison chart

Pre-Filter Permafilt pre-filter designed to be vacuumed from outside of unit
HEPA Filter Medical-grade HEPA removes 99.97% of all airborne particles down to 0.3 microns in size, with 95% effectiveness at 0.1 microns
Surface Area of HEPA Media 60 sq. ft.
Type of Carbon Media Military carbon cloth
Carbon Weight N/A
Surface Area of Carbon Media N/A
Average Filter Life Pre-Filter: 5 years (if vacuumed occasionally)
Combined HEPA/Carbon Cloth Filter: 5 years
Estimated Filter Replacement Costs Pre-Filter: $45
Combined HEPA/Carbon Cloth Filter: $375
UV Lamp Not available
Average UV Lamp Life N/A
UV Bulb Replacement Cost N/A
Room Coverage**
(on High Speed Setting)
940 sq. ft. (2 air exchanges/hr)
470 sq. ft. (4 air exchanges/hr)
315 sq. ft. (6 air exchanges/hr)
235 sq. ft. (8 air exchanges/hr)
Air Flow Rate** 250 cubic ft. per min. at high speed setting
Fan Output 400 cubic ft. per min. at high speed setting
Air Intake 360 degree air intake system
Air Output Directed to one side from upper deck outlet, louvered
Ozone Emission None
Decibel Level 40 dB (low) to 65 dB (high)
Voltage 120V
Power Consumption 56 watts, 0.51 amps (low) – 132 watts, 1.3 amps (high)
Cord Length 5 feet
Safety Approvals CSA/UL approved
Motor Permanent split capacitor, rated for long life duty at continuous high RPM, with shock absorbing motor mounts
Speed 3 control settings
Housing Construction Perforated 23 gauge steel with baked-on powder-coated finish
Filter Access Bottom plate easily removed via screws
Maneuverability Mounted on easy roll casters
Dimensions 23” (height) x 14.5” (width) x 14.5” (depth)
Operating Weight 35 lbs.
Shipping Weight Approx. 40 lbs.
Remote Control Not available
Filter Life Monitor No
Programmable Timer No
Optional Accessories None available for this particular model
Warranty 5 years (if purchased in Canada from an authorized Canadian dealer)
Place Manufactured USA

Austin Air colour swatch

Note:   Individual computer monitors display colours differently so product images and colour samples may not match product exactly.


“I must say that I'm impressed with the Austin Air Allergy Machine I purchased two weeks ago. The Austin air purifier has made a significant difference in the quality of air in my home, especially in this climate when the house is closed up for the better part of the year. After experiencing the Allergy Machine and the wonderful job it is doing, I thought that an Austin Air Baby’s Breath would be a great gift for my daughter who is expecting in April, my first grandchild.”
J. Spooner, Edmonton, AB

“We have affectionately named our Austin Air Allergy Machine “Austin.” He (Austin) has really helped us. To make a very long story short, our apartment has a mold problem, and we are not able to move until later in the year. Austin has helped us to continue functioning in the interim. As an added bonus, my mild spring allergies were almost non-existent this spring. We are very happy with our purchase!”
NSL, Swift Current, SK

“I have had my Austin Air Allergy Machine for a week now, and there has been a considerable improvement in the air quality in our home. Love it.”
D. Richardson, Fort Macleod, AB

See all Austin Air Reviews

** An Important Word on Air Flow Rates and Room Coverage for the Austin Air Allergy Machine Air Purifier:

Many retailers and manufacturers overstate maximum room coverage figures by calculating them with air flow rates measured without filters installed (i.e., fan output) or with too low a number of air exchanges per hour to properly clean the room. Modern Alchemy Air Purifiers believes in stating the actual delivered air flow rates for the air purifiers we sell, as well as realistic room coverage figures calculated at effective air cleaning levels. Accordingly, we recommend that the Austin Air Allergy Machine be used in rooms of up to 235 sq. ft. (for allergy/asthma sufferers) or 470 sq. ft. (for general purpose filtration).

Also note that air purifier performance should not be judged by air flow rates and room maximums alone. Many features that make an air purifier more effective at cleaning the air actually reduce the air flow rate. For example, higher grade HEPA filters, well-sealed filtration systems and large amounts of carbon all increase air resistance and reduce delivered air flow rates.
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Modern Alchemy Air Purifiers is 100% Canadian-owned, operating out of Ottawa, Canada. We proudly serve Vancouver, Calgary, Edmonton, Regina, Winnipeg, Toronto, Montreal, Halifax, St. John’s and all points in between.

To order by phone, or for more information, call: 613-894-0331
Toll Free: 1-877-467-7873

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