Austin Air Purifiers

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Austin Air Allergy Machine® HM405

(1 customer review)


Trusted by allergy and asthma sufferers, Austin Air Allergy Machine is a timeless option that gets the job done quietly and effectively. Created for the most sensitive noses, it provides the highest protection from dust particles, pollen, pet dander and mold.

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The Allergy Machine® HM405 provides maximum protection for asthma, mold problems and humid environments.

  • Effectively manages airborne particles, including bacteria, virus and allergens.
  • Clinically tested and shown to reduce the incidence of severe asthmatic episodes.
  • Unique carbon cloth design increases air flow and delivers pure air in 15 seconds flat.  
  • The active HEGA media removes odors, toxic chemicals and gases.
  • Helps manage airborne COVID-19.
  • The powerful HEPA filter removes the tiniest submicron particles including allergens, (dust mites, pet dander, pollen and mold spores) from the air.


Girl-With-DandelionThe Secret to Highest Air Quality Management

Allergy Machine is equipped with an ultra-powerful 4 stage filter.  Delivers the most advanced filtration technology ever. Every component is uniquely designed to provide maximum performance and energy efficiency. This technology combines Medical Grade HEPA filtration and activated carbon cloth to capture and remove  99.7% of viruses, bacteria, mold, allergens, and odors.

Our Air Cleaners are built to last with a 5-year warranty!

Easy to maintain and use, all of our Austin Air units come with our expert support and guidance to make the most out of your filter. Replacement filters are only needed once every 3-5 years. We ship them to you automatically, and we cover the cost of the shipping. 


Austin Air Technical Specifications Allergy Machine® HM405 Standard HEPA Air Cleaner
DIMENSIONS 14.5" W x 14.5" D x 23" H
WEIGHT 34 lbs.
CONSTRUCTION 23-gauge steel housing with 360° intake. Baked on powder coat finish. Available in Black and Sandstone. Easy roll casters included.
MOTOR Thermally protected Permanent, Split Capacitor (PSC) high efficiency motor, Max. HP: 1/11.5, with CSA C-US approval.
POWER CSA RATING 120 VAC 60 Hz, Max. Watt: 147, Max. Amp: 1.2
POWER SWITCH Three Speed Control High Medium Low
POWER RATING AT SPEED Watts power 137 Watts 82 Watts 56 Watts
Amps 1.2 Amps 0.71 Amps 0.51 Amps
FAN 3 speed centrifugal fan rated Cubic Feet per Minute (CFM) 400 CFM 200 CFM 75 CFM
CFM after the filter 250 CFM 125 CFM 47 CFM
Fan sound level in decibels (dB) 65 dB 55 dB > 40 dB
COMPARATIVE SOUND Normal Conversation
Normal Conversation
Stream, refrigerator humming
Austin Air Technical Specifications Allergy Machine® Standard Filter FR405
Dimensions: 13.5 in. diameter, 14.5 in. height
Perma Filter Pre-Filter®
Military Grade HEGA Carbon Cloth. HEGA (High Efficiency Gas Arrestance)
60 square feet True Medical HEPA grade filter medium.
Metal end caps with foam sealing gaskets top and bottom.
Filter total weight of 10 lbs.
STAGE 1 – Perma Filter Pre-Filter. A Large Particle pre-filter.Removes visible particles.
STAGE 2 – Medium Particle Pre-filter. Removes small to medium size particles.
STAGE 3 – 60 sq. ft. of True Medical Grade HEPA. Removes 99.97% of all particles larger than 0.3 microns and 95% of all particles larger than 0.1 microns.
STAGE 4 – Military Grade Carbon Cloth - HEGA (High Efficiency Gas Arrestance).
Allergy Machine ® Technical Specifications
HM405 Standard Size Air Cleaner
DIMENSIONS 14.5" W x 14.5" D x 23" H
WEIGHT 47 lbs.
CONSTRUCTION 23-gauge steel housing with 360° intake.
MOTOR Permanent Split Capacitor (PSC) high efficiency motor
POWER RATING Maximum Watt: 147, Amp: 1.2
FAN Three speed centrifugal fan
COMPARITIVE SOUND 40 to 65 dB (normal conversation to a stream)
Allergy Machine® Filter Assembly - FR405
DIMENSIONS 13.5" D x 14.5" D
WEIGHT 23 lbs.
CONSTRUCTION Metal end caps with foam sealing gaskets
STAGE 1 Large Particle Pre-Filter
STAGE 2 Medium Particle Filter
STAGE 3 60 sq. ft. of True Medical Grade HEPA
STAGE 4 Military Grade Carbon Cloth (HEGA)


1 review for Austin Air Allergy Machine® HM405

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  1. Mary M, Sacramento CA

    My Bedroom Machine and Allergy Machine work great! I have asthma and I feel like I am at the ocean breathing fresh air with these filters!”

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