What’s the difference between The Austin Air Filters?
All Austin Air purifiers share the same purpose: to create cleaner, healthier indoor air. The differences come down to the type and combination of filtration media used to target specific air quality problems — such as allergens, odors, chemicals, and toxic gases.

ALL Austin Air Filters Start With TWO Prefilters
ALL Austin Air purifiers start with two essential prefilters (these help increase the longevity and filtration capacity of the main filter - most other brands do not have these.):
- Large particle prefilter: Removes visible particles such as dust, hair, and pet dander
- Medium particle prefilter: Removes small to medium particles such as mold spores and pollen
Additionally, all Austin Air purifiers have an unprecedented amount of medical-grade HEPA for particle removal and some form of carbon for chemical removal. (It should be noted we use far more combined HEPA/carbon than other brands in the industry.)
From there, each model uses additional filtration media depending on your air quality needs. Think of the lineup as levels of protection that build on each other.
Clinically-Proven Base Models
The HealthMate & Allergy Machine Filter
Our two base model filters (The HealthMate and the Allergy Machine filter) are the core of the Austin Air lineup. Both have been used in clinical and research environments and deliver proven performance for everyday air quality needs.

HealthMate – Balanced Everyday Air Cleaning
Designed for broad, whole-room air cleaning and was our flagship product in 1990.
Filtration media includes:
- A large bed of granular activated carbon and Mineral-Based Filtration (up to 15 lbs.!) to adsorb odors, gases, VOCs, and chemicals
- 60 square feet of true medical-grade HEPA to capture dust, pollen, mold spores, bacteria, and ultrafine particles
Best for: Homes, schools, and shared spaces needing consistent, everyday air quality improvement.

The Allergy Machine Filter – Focused Allergen Defense
Designed specifically for allergy and asthma relief. This is available only as a replacement filter.
Filtration media includes:
- 60 square feet of true, medical-grade HEPA to capture dust, pollen, mold spores, bacteria, and ultrafine particles
- Military-grade HEGA carbon cloth to adsorb gases, odors, bacteria, and viruses
Best for: Environments where airborne particles and allergens are the primary concern and quick purification is a must.
Enhanced Protection Models
The HealthMate Plus & The Bedroom Machine
These models include some or all of the filtration of the base models and add extra media for more advanced chemical or toxin protection.

HealthMate Plus – Advanced Chemical & Smoke Protection
Everything in the HealthMate, plus:
- A special impregnated carbon to better remove certain VOCs, formaldehyde, benzene, and wildfire-related toxins
Best for: Wildfire smoke, renovation fumes, high-VOC environments, and stronger chemical exposure.

Bedroom Machine – Allergen + Chemical Protection for Sleep Spaces
Combines the filtration of both base models (Allergy Machine Filter + HealthMate Filter):
- 60 square feet of true, medical-grade HEPA for particles and allergens
- Military-grade HEGA carbon cloth (A single gram of HEGA cloth has a surface area equivalent to half the size of a football field.)
- Up to 15 lbs of our activated carbon and Mineral-Based Filtration mixture for chemical and odor adsorption
Best for: Bedrooms as the additional carbon removes pollutants off-gassing from furniture, flooring, mattresses, and household materials to assist lungs in the supine (sleeping) position.
Maximum Protection Model
The Immunity Machine

Immunity Machine – Austin Air’s Most Advanced System
This is the highest level of protection in the Austin Air lineup.
It includes all core filtration technologies used across other models, and adds a proprietary four-phase granular defense system that aggressively targets harmful gases and toxins.
Filtration media includes:
- Granulated activated carbon
- Impregnated carbon
- Mineral-Based Filtration and impregnated Mineral-Based Filtration
- Medical-grade HEPA
- HEGA carbon cloth
What makes it different: The four-phase granular media works as one integrated system to adsorb the most detrimental toxins impacting the human immune system, including VOCs, formaldehyde, ammonia, nitrogen dioxide, and other harmful gases.
Simple Model Guide
Allergies & particles: Allergy Machine Filter or HealthMate
Everyday clean air: HealthMate
Heavy chemicals & smoke: HealthMate Plus
Bedroom & off-gassing protection: Bedroom Machine
Maximum toxin defense: Immunity Machine
Need Volume Pricing?
Buying for a classroom, office, or team? Our customer service reps can provide volume pricing and help you choose the right quantities. Give us a call or send an email for custom assistance