Austin Air Allergy Machine Air Purifier

Austin Air

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43.00 LBS
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Product Overview

The Austin Air Allergy Machine HM405 air cleaner. The best allergy air purifier on the market.

Get 10% off your purchase! Just enter "austin" in coupon section at checkout! Offer ends Soon!

The Austin Air Allergy Machine air purifier (HM405) was designed to offer allergy and asthma sufferers’ maximum air filtration for the reduction of symptoms associated with pollen, pet dander, dust and other allergens. Integrating a military grade carbon cloth with a HEPA media, the HM405 provides high efficiency absorption of harmful gas contaminants and 99.97% of all particles down to 0.3 microns. Perfect for large spaces up to 1500 square feet, the powerful Allergy Machine HM405 can change out the air in the room up to 2 times per hour with minimal energy consumption. Safe and effective, the HM405 provides you with healthier, cleaner air without producing any harmful ozone.

The Austin Air Allergy air purifier HM405 surpasses other air purifiers at cleaning the air because of the 360º air intake system which allows 250 cubic feet of air passes through the unit every minute. Made of 22 gauge steel, the perforated intake system draws air in from all four sides of the unit. The air is then purified utilizing a 4 stage filter that progressively removes contaminants from the air. In stage 1, a large particle pre-filter captures particles visible to the naked eye like hair, dust and pet dander. In stage 2, a medium particle pre-filter removes small to medium particles like mold spore, pollen, bacteria and viruses. In Stage 3, 60 square feet of certified true medical HEPA, the most effective filtering media available, removes 99.97% of all particles down to 0.3 microns and 95% down to 0.1 microns. Stage 4 utilizes activated military grade carbon cloth to remove odors from pets, smoke, tobacco, gases and other VOC’s. For the most efficient air purification, make sure to run your HM405 on high for the first four hours of use and allow for at least a 4” clearance from walls and/or furniture for maximum filtration.

The HM405 requires very little maintenance. Vacuum the surface with a brush attachment to remove any dust buildup around the air intake area. Other surfaces can be cleaned with a damp cloth.

Austin Air offers a Clean Air Guarantee. If you are not completely satisfied with your Allergy Machine air cleaner HM405 just return within 30 days of the date of purchase it for a full refund, minus the cost of shipping originally incurred by the seller.

Austin Air stands behind the Allergy Machine HM405 and ensures that it will be free from all material and workmanship defects for 5 years from the date of purchase. To take advantage of this warranty, the unit must have been used under normal residential conditions and the product warranty registration completed. Austin Air reserves the right to repair or replace your unit.

The Austin Air Allergy Machine air purifier HM405 has a 5 year prorated filter warranty. With a life expectancy of 5 years under normal residential use, filters from Austin outperform other air purifier filters. Certainly, in environments with higher concentrations of smoke, chemical vapors and soot, the life of the filter could be shorter. The prorated warranty allows you to receive a discount on the purchase of your next filter based on the length of time your current filter was used. Check out the chart below, to see what you could save. Please note that Austin Air does reserve the right to refuse a filter replacement at a prorated price and/or request that the filter be returned for inspection.

The Austin Air Allergy Machine Air Purifier At A Glance:

For large areas up to 1500 sq. ft.

360º air intake system

All steel construction

Powder coated finish

4 stage filter - Filters down to 0.1 microns

3 speed controls

Wheels included

5-ft. power cord

No Ozone emissions

1.3 Amp


56-115 watts

3 speed PSC motor

50-66 dBA

5 year mechanical warranty

5 year prorated filter warranty

UL certified

CSA certified

NRTL Approval

Made in the U.S.A.

Color Options: Sandstone, White, Black, Midnight Blue

Dimensions Of The Austin Air Allergy Machine Air Purifier:

Height: 23

Width: 14.5

Depth: 14.5

Weight: 29-lbs

Shipping weight: 39-lbs.

5 year pro rated filter warranty:

Up to 2 years of use: 40% off the retail price of a new filter, plus shipping

Up to 2-3 years of use: 30% off the retail price of a new filter, plus shipping

Up to 3-4 years of use: 20% off the retail price of a new filter, plus shipping

Up to 4-5 years of use: 10% off the retail price of a new filter, plus shipping

Replacement filter for the Austin Air Allergy Machine HM405 Air Purifiers: FR405

Filter Specifications 

STAGE 1: PRE-FILTER FOR LARGE Particles,   removes visible, observable particles (e.g. dust, hair and pet dander)
Stage 2: Pre-filter with a medium particle size. dispenses with particles of a small to medium size (e.g. molds, spores and pollen)
STAGE 3 - True Medical Grade HEPA covering 60 square feet. eliminates 99% of all particles larger than 0.1 microns and 99.97% of all particles larger than 0.3 microns.

STAGE 4: Military Grade HEGA Carbon Cloth is For the adsorption of chemicals, gases, viruses, and bacteria, HEGA (High Efficiency Gas Arrestance) offers a very wide surface area.

Warranty Information

5 Year Warranty


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  • 5

    Posted by Darrell L. on 3rd Feb 2023

    Arrived quickly, rolls around where ever I need it. Great air purifier! Would buy from AMI again.

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