Bedroom Machine HM402 Replacement Filter with Pre-Filter

By: Austin Air

Choose Pre-Filter Color:
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Manufacturer Part # FR402B Our Item # IA3814

Austin Air Bedroom Machine HM-402. Or upgrade your existing standard size Austin Air unit to a Bedroom Machine unit by installing this Bedroom Machine filter (not compatible with Junior size units, or units manufactured prior to August 1995).

Includes PermaFilt Prefilter in White or Black. The white pre-filter option is recommended if you own a Sandstone, Silver or White colored unit, and the black pre-filter is recommended if you own a Black or Midnight Blue unit.

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  • Dimensions: 13.5" Diameter x 14" H
  • Weight: 23 lbs.
  • Part: FR-402 (FR402)

Genuine OEM Austin Air Filter
Genuine OEM Austin Air Brand Replacement Filter

NOTE: This filter is manufactured by Austin Air, and is the highest quality, longest lasting filter available for your Austin Air Purifier. Be wary of lower-quality generic knock-off filters.

5-Stage Filter Configuration:

PermaFilt pre-filter is Stage 1, then main filter combines four additional stages of filtration:

  • STAGE 1: Large Particle PermaFilt Pre-Filter (wraps around main filter)
    Cleanable re-usable prefilter traps large particles easily seen by the naked eye (dust, hair, lint, pet dander, etc) while prolonging the life of the main filter. Easy to maintain - simply vacuum clean monthly from the outside of the unit. 
  • STAGE 2: Medium Particle Pre-Filter
    Removes additional small to medium sized particles (mold spores, pollen).
  • STAGE 3: 15 lbs Carbon / Zeolite Blend
    Activated granular carbon/zeolite adsorbs commonly found household odors, gases and chemicals.
  • STAGE 4: 60 sq ft Certified True HEPA filter media
    Medical-grade True HEPA pleated filter material. Traps up to 99.97% of particles as small as 0.3 microns that pass through the filter.
  • STAGE 5: HEGA Carbon Cloth
    Lightweight HEGA cloth (High Efficiency Gas Adsorption) reduces chemical pollutants, gases, and odors.