The Dri-Eaz HEPA 500 1st Stage Pre-Filter restores your Dri-Eaz HEPA 500 to full efficiency. It should be replaced regularly to ensure maximum performance. The synthetic fibre pre-filter media rated at 30% efficiency captures the largest particles to help extend the life of the Primary HEPA filter inside. Use this 2nd Stage pre-filter for standard air scrubbing on a clean water loss. Use for both the first stage and second stage pre-filters for standard air scrubbing in environments with higher particle loads, such as construction or remodelling sites.
Product Features:
- Low-pressure drop and superior efficiency
- High dust-holding capacity
The DefendAir HEPA 500 may be set up in a variety of filter configurations to suit your particular 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-rated performance for sensitive jobs requiring first-pass HEPA filtration. More info.
- Activated Carbon Filter (F397). The activated carbon filter allows the removal of 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.
