This replacement filter is for the Austin Air Allergy (HEGA) Machine and includes a pre-filter.

The Allergy Machine addresses the complete spectrum of air cleaning, removing sub-micron particles, noxious gases and chemicals. HEGA purification provides medical-grade filtration for individuals who suffer from serious allergies and asthma. Austin Air’s 360-degree intake system draws air into all sides of the HealthMate™, passing it through a 4-stage filter. The result, more clean air delivered faster and more efficiently than any other air cleaner on the market.  

• STAGE 1 - Large Particle Pre-filter • Removes particles easily seen by the naked eye (e.g. dust, hair and pet dander) 
• STAGE 2 - Medium Particle Pre-filter • Removes small to medium size particles (e.g. molds, spores and pollen) 
• STAGE 3 - 60 ft. of True Medical Grade HEPA • Removes harmful micro-organisms (e.g. bacteria and viruses) 
• STAGE 4 - Activated Military Carbon Cloth • Removes chemicals, gases and odors (e.g. formaldehyde and ammonia)

Compatibility: This replacement filter is interchangeable with all standard sized Austin Air replacement filters and is compatible with all standard sized Austin Air models. The HM-405 replacement filter can be used with the HM-400, HM-410, HM-450, and the Bedroom Machine.