Role of the Medium Stage
F5-F9 filters remove fine dust, pollen and many microbes. They serve as the final filter in offices and hospitals, or the pre-HEPA stage in cleanrooms.
Build Types
- Pocket (bag) filters – high-loft synthetic media in 4-10 pockets; best ΔP/life balance; F5-F9.
- Rigid V-cell / mini-pleat – compact, high area, low ΔP; for tight housings and pre-HEPA.
- Panel – rigid cell, F5-F7; for shallow slots.
Typical Specifications
| Class | ISO 16890 | Initial ΔP | Use |
|---|---|---|---|
| F5 | ePM10 50% | 45-60 Pa | Commercial final |
| F7 | ePM2.5 ~60% | 60-80 Pa | Hospital, lab, food |
| F9 | ePM1 ≥ 90% | 80-95 Pa | Pre-HEPA |
Selection Checklist
- Offices/schools: F5-F7. Health-care: F7-F8. Pre-HEPA: F9.
- Prefer V-cell where housing depth is limited.
- Verify media is progressively structured for high dust-holding.
- Pair with a healthy G4 primary to stretch life.
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Model Range & Specifications
| Model | EN 779 class | ISO 16890 equivalent | Average efficiency | Construction | Typical initial ΔP | Recommended final ΔP |
|---|---|---|---|---|---|---|
| 26YC-MF-F5-600 | F5 | ePM10 50–65% | 40–60% | Bag, 5–8 pockets, 600 mm deep | 55–75 Pa | 250–300 Pa |
| 26YC-MF-F6-600 | F6 | ePM10 65–90% | 60–80% | Bag, 5–8 pockets, 600 mm deep | 65–90 Pa | |
| 26YC-MF-F7-600 | F7 | ePM1 50–65% | 80–90% | Bag, 6–8 pockets, 600 mm deep | 95–130 Pa | |
| 26YC-MF-F8-600 | F8 | ePM1 65–75% | 90–95% | Bag, 8 pockets, 600 mm deep | 110–150 Pa | |
| 26YC-MF-F9-600 | F9 | ePM1 75–85% | 95–98% | Bag, 8 pockets, 600 mm deep | 130–170 Pa | |
| 26YC-VC-F8/F9-292 | F8 / F9 | ePM1 65–85% | 90–98% | Minipleat V-cell, plastic frame, 292 mm deep | 120–160 Pa | 300 Pa |
Standard face size 592 × 592 mm; rated airflow ≈ 3 400 m³/h per module; max continuous temperature 80 °C. Higher-efficiency ePM1 versions, stainless headers and washable variants available on request — send us your airflow and space limits for a free selection.
Frequently Asked Questions
Where are F5 to F9 filters used?
They serve as final filters in commercial HVAC or as pre-HEPA stages where better comfort or indoor air quality is required.
What is the difference between pocket and V-cell filters?
Pocket filters are economical, while V-cell designs pack more media, give lower pressure drop and fit tight plant spaces.
What ISO 16890 band does an F7 represent?
An F7 roughly corresponds to the ePM2.5 50 to 70 percent band under the newer ISO 16890 standard.
Can medium-efficiency filters remove viruses?
They capture some droplets and particles but dedicated infection-control strategy relies on HEPA terminal filtration.
