Austin Air Pre Replacement Filter HEPA Permafilt Standard Size F400B White

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Austin Air Large Pre Filter for Standard Machines F400B White

SKU: F400B
UPC: 769100040032

The Austin Air Large Pre Filter for Standard Machines F400B White is designed to capture large airborne particles before they reach the internal filters.

This genuine replacement pre filter ensures consistent airflow, protects advanced filtration media, and supports long term purifier performance.

Durable construction and easy exterior vacuum cleaning make it a practical solution for households seeking reliable air quality improvement.

Finished in white, it matches sandstone and white Austin Air units for a clean, uniform appearance.

Main Purpose: Large Particle Filtration

Weight: 1 lb

Works with Models:

Austin Air Allergy Machine (HM405), Austin Air Bedroom Machine (HM402), Austin Air HealthMate (HM400), Austin Air HealthMate Plus (HM450), Austin Air Pet Machine (HM410), and the Advanced HEPA+ Air Purifier

What It Filters Out

• Dust

• Hair

• Lint

• Soot

• Pet dander

• Visible airborne particles

• Household debris

• Large contaminants over ten microns

• Fibers and textile particles

• Surface-level pollutants

• Common indoor allergens

What's Inside

A durable filtration material engineered to trap large particles and protect the HEPA and carbon filters inside Austin Air standard machines.

Medical-Grade True HEPA

• Works in tandem with HEPA filters

• Reduces debris exposure to HEPA media

• Preserves HEPA efficiency

• Supports removal of fine particles

• Enhances purifier longevity

• Improves airflow consistency

• Reduces need for frequent HEPA replacement

• Complements multi-stage filtration system

All-Steel Housing

The pre filter is housed within Austin Air’s durable steel construction, ensuring long term reliability and protection.

Who It’s For

• Homeowners seeking cleaner indoor air

• Pet owners managing dander and hair

• Families with allergy concerns

• Apartments and small offices

• Users wanting long term filter protection

• Those preferring low maintenance solutions

• Health-conscious households

• Environments with visible dust or soot

Why Austin Air

• Genuine manufacturer replacement part

• Designed for standard size Austin Air units

• Long lasting service life

• Easy exterior vacuum cleaning

• Supports multi-stage filtration system

• Trusted brand for air purification

Filter Life and Value

With proper care, the pre filter lasts for years, reducing the frequency of internal filter replacements and lowering long term maintenance costs.

Specs

• Product Type: Large particle pre filter

• Compatible Models: All standard Austin Air machines

• Particle Capture Size: Over ten microns

• Color: White

• Lifespan: Multiple years with care

• Manufacturer: Austin Air

• Weight: 1 lb

Long-Term Use and Maintenance

Routine vacuuming of the exterior restores airflow and keeps the filter effective. Designed for repeated cleaning without disassembly.

Advanced Filtration Performance

By capturing large particles early, the pre filter allows HEPA and carbon filters to focus on finer contaminants, gases, and odors.

The Bottom Line

The Austin Air Large Pre Filter F400B White is an essential first stage component that protects your purifier’s internal filters, supports long term performance, and ensures cleaner indoor air.