Austin Air
Austin Air Standard Permafilt Pre-Filter
Best maintenance essential for long-term air purifier owners.
The Austin Air Standard PERMAFILT Pre-Filter is designed to fit all standard, full-sized Austin Air purifiers, including the Healthmate, Healthmate Plus, Allergy Machine, Pet Machine, and Bedroom Machine models. This essential outer filter captures large particles, protecting the main filter and extending its life. A key benefit is its washability; it can be vacuumed from the outside, eliminating the need for costly three-month filter changes and offering a more economical and convenient solution for maintaining air quality.
$34.49
Owner Satisfaction
4.6
/ 5
Category Rank
179
/ 1673
#179 in Electronics Accessories
Price vs Category Average
-79%
Below average
Part Number
400
/ F
Who it's for
- Budget-conscious owners looking to maximize main filter longevity
- Busy homeowners wanting minimal maintenance routines
- Long-term users seeking durable, reliable replacement parts
Who should skip it
- People who struggle with precise, manual assembly tasks
- Shoppers needing a standalone solution for chemical or odor removal
- Users preferring a completely hands-off air purification experience
Performance breakdown
Filtration Efficiency
Effectively captures large airborne particles before they reach the primary filter.
Maintenance Convenience
Simple vacuuming process makes routine upkeep quick and hassle-free.
Longevity Value
Washable design significantly extends the operational lifespan of expensive main filters.
Compatibility Range
Seamlessly integrates across the entire Austin Air full-sized product lineup.
Build Durability
Robust construction withstands repeated vacuuming without losing structural integrity.
Replacement Frequency
Reusable nature eliminates the need for frequent, costly filter replacements.
Key Specs
Part Number
F400
Compatible Models
HM400, HM405, HM410, HM450, HM402
Filter Type
Pre-filter
Washable
Yes, can be vacuumed from the outside
Replacement Interval
Eliminates costly three-month filter changes
Features
- Traps large particles
- Washable and reusable
- Can be vacuumed from the outside
- Extends the life of the main filter
- Cost-effective alternative to frequent replacements
- Fits all standard, full-sized Austin Air purifiers
What customers say
Customers consistently praise the Austin Air Standard Permafilt Pre filter for its exceptional durability and seamless integration into their air purification systems. Many users highlight the ease of maintenance as a primary benefit because it effectively captures larger particles to protect the main filter. The build quality feels substantial and reliable which provides peace of mind for long term use. This pre filter represents a smart investment for those seeking to maintain peak performance without frequent replacements. Its straightforward design ensures a perfect fit every time making it a dependable choice for clean air enthusiasts.
Know before you buy
This pre-filter is designed to fit all standard, full-sized Austin Air units, including the Healthmate, Healthmate Plus, Allergy Machine, Pet Machine, and Bedroom Machine series (specifically models HM400, HM405, HM410, HM450, and HM402).
You do not need to remove the filter to clean it. Simply use the brush attachment on your vacuum cleaner to gently vacuum the exterior of the unit, which removes trapped dust and large particles from the pre-filter surface.
Yes. By capturing large particles like dust, hair, and pet dander before they reach the main HEPA filter, the pre-filter prevents premature clogging and helps the main filter perform at peak efficiency for its full lifespan.
Because this filter is designed to be vacuumed regularly, it eliminates the need for the standard three-month replacement cycle. You only need to replace it when it becomes visibly worn or if vacuuming no longer effectively removes the buildup.
No, this pre-filter is designed to be cleaned via vacuuming. Using water or liquid cleaners can damage the filter material and compromise its ability to trap particles effectively.
Still have a question?
Ask Hayley anything about this product before you decide.