DefendAir First Stage Pre-Filter
Features
- Synthetic fibre filter media rated at 10% efficiency
- Low pressure drop and superior efficiency
- High dust-holding capacity
- Extends life of HEPA filter element by capturing the larger particles
- Sturdy cardboard frame
- Change pre-filter on every job or when visibly loaded, whichever comes first.
- Single filter package.
| HEPA 500 FILTER CONFIGURATIONS | |||
| Filtering requirements | PREFILTERS (Positions 1 & 2) | HEPA (Position 3) | |
| Clean water loss air scrubbing. For a relatively clean environment. | n/a | 30% Prefilter (F271) | HEPA filter (F321) |
| Standard air scrubbing. For environments with higher particle loads, such as construction or remodelling sites. | 10% Prefilter (F270) | 30% Prefilter (F271) | 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. See “About DOP First-Pass Filtration Efficiency,” p. 3. | 30% Prefilter (F271) | DOP Prefilter (F415) | HEPA filter (F321) |
| Odour control and air filtration. For removing volatile organic compounds (VOCs), food odours, fumes from paint and paint thinners, sewer odours, and many other noxious odours. | Activated Carbon Filter (F397) | 30% Prefilter (F271) | HEPA filter (F321) |
