Below is a simplified table for HEPA filters, assuming standard conditions.
| Parameter | Unit | Description |
|---|
| Filter Size | Inches | Dimensions of the filter (width x height x depth) |
| Face Velocity | Feet per minute (fpm) | Airflow speed at the filter’s face |
| Initial Pressure Drop | Inches of water (in H2O) | Initial resistance to airflow when the filter is clean |
| Filter Efficiency | % | Percentage of particles captured at a specific particle size |
| Airflow Rate | Cubic feet per minute (CFM) | Volume of air passing through the filter per minute |
| Recommended Final Pressure Drop | Inches of water (in H2O) | Maximum allowable pressure drop before filter replacement |
| Filter Media | – | Type of media used in the HEPA filter (e.g., fiberglass, synthetic fibers) |
| Particle Size | Micrometers | Size of particles used to test filter efficiency |
| Filter Life | Months | Expected operational life of the filter before replacement is needed |
Example Table for Specific HEPA Filters
| Filter Size | Face Velocity | Initial Pressure Drop | Filter Efficiency | Airflow Rate | Recommended Final Pressure Drop | Filter Media | Particle Size | Filter Life |
|---|
| 24x24x12 inches | 250 fpm | 1.0 in H2O | 99.97% @ 0.3 µm | 2000 CFM | 2.5 in H2O | Fiberglass | 0.3 µm | 12 months |
| 24x24x12 inches | 300 fpm | 1.2 in H2O | 99.99% @ 0.3 µm | 2400 CFM | 3.0 in H2O | Synthetic Fibers | 0.3 µm | 10 months |
| 12x12x6 inches | 250 fpm | 0.5 in H2O | 99.97% @ 0.3 µm | 500 CFM | 2.5 in H2O | Fiberglass | 0.3 µm | 12 months |
| 12x12x6 inches | 300 fpm | 0.6 in H2O | 99.99% @ 0.3 µm | 600 CFM | 3.0 in H2O | Synthetic Fibers | 0.3 µm | 10 months |