The Dri-Eaz HEPA 500 Primary HEPA Filter is the essential high-efficiency filtration component designed for use with the Dri-Eaz HEPA 500 Air Scrubber. Engineered to deliver industry-standard air purification performance, this true HEPA filter captures 99.97% of particles down to 0.3 microns, ensuring clean, safe air during restoration, remediation, and construction applications.

Features:

Proper HEPA Filtration – Removes fine particulates including dust, mould spores, pollen, pet dander, and other airborne contaminants.
Precision-Fit for the HEPA 500 – Explicitly manufactured for the Dri-Eaz DefendAir HEPA 500 to ensure optimal airflow and filtration performance.
High Dust-Holding Capacity – Long service life reduces filter changes during extended restoration jobs.
Rugged, Commercial-Grade Construction – Built to withstand demanding environments such as water damage restoration, construction sites, and mould remediation projects.

Applications:

Water and flood restoration
Mould remediation and IAQ (Indoor Air Quality) control
Construction dust control
Odour removal when paired with activated carbon filters
Commercial and residential air scrubbing

Specifications:

Product Code: F321
Dimensions: 405 x 482 x 55 mm (the filter is flared, so it has different dimensions on each side)
Filter Type: True HEPA (99.97% @ 0.3 microns)
Compatibility: Dri-Eaz DefendAir / HEPA 500 Air Scrubber
Installation: Simple drop-in replacement

The DefendAir HEPA 500 can be configured with a variety of filters to suit your specific air scrubbing requirements. Use the chart below to find the best filtering configuration for the job at hand.

Filtering Application	First filter position	Second filter position	Final filter (HEPA)
Clean water loss air scrubbing. For a relatively clean environment.	(no filter necessary)	2nd Stage Pre-Filter (F271 or AC36F2)	HEPA filter (F321)
Standard air scrubbing. For environments with higher particle loads, such as construction or remodelling sites.	1st Stage Pre-Filter (F270)	2nd Stage Pre-Filter (F271 or AC36F2)	HEPA filter (F321)
First pass efficiency air filtration. For use with a negative air setup during remediation of high-risk contaminants and/or when DOP testing is required.	(no filter necessary)	DOP Pre-Filter (F415)	HEPA filter (F321)
Odour control and air filtration. For the removal of volatile organic compounds (VOCs), food odours, fumes from paint and paint thinners, sewer odours, and many other noxious odours.	Activated Carbon Filter (F397)	2nd Stage Pre-Filter (F271 or AC36F2)	HEPA filter (F321)

Filter Types:

1st Stage Pre-Filter (F270). Synthetic fibre filter media rated at 10% efficiency. Captures the largest particles to help extend the life of the higher efficiency filters inside. More info.
2nd Stage Pre-Filter (F271 or AC36F2). Synthetic fibre filter media rated at 30% efficiency. Captures larger particles to help extend the life of the HEPA filter. More info.
DOP Stage 2 Pre-Filter (F415). Use of the DOP filter ensures laboratory-grade performance for sensitive jobs that require first-pass HEPA filtration. More info.
Activated Carbon Filter (F397). The activated carbon filter removes a wide variety of compounds, including volatile organic compounds (VOCs), food odours, fumes from paint and paint thinners, sewer odours, and many other noxious odours. Combining activated carbon filtration with HEPA filtration is especially effective in removing airborne soot particles and the odours they create. More info
HEPA filter (F321). The HEPA filter has an efficiency rating of 99.97% against 0.3 micron oily aerosol particles. The HEPA filtration standard was developed in the 1940s to control radioactive dust particles in U.S. nuclear laboratories. More info.

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