Medium Efficiency Air Filters (M5–F9) | EN779 & ASHRAE Certified for Global HVAC, Paint Booths & Cleanrooms
Bag-Type Medium Filters
Washable or disposable bag filters in M5–F9 grades. Aluminum or galvanized steel frame. High dust capacity for paint booths and HVAC.
Box-Type with Separator
Rigid box design with aluminum separators. Glass fiber media, dual flange. Suitable for high-moisture and variable airflow systems.
Compact Pleated Panel
Space-saving pleated design. Low pressure drop. Ideal for retrofit projects and compact AHUs.
V-Bank Filter System
3V/4V configuration for high-volume air handling units. Extended surface area, long service life.
Kunshan Kunhai Clean Technology Co.,Ltd. globally certified medium efficiency air filters (M5, M6, F7, F8, F9) for industrial and commercial applications worldwide. Our filters are engineered to capture airborne particles between 0.5μm and 5μm, delivering high dust holding capacity, low initial resistance, and fire-safe performance in demanding environments.
Trusted by clients across North America, Europe, Southeast Asia, and the Middle East, our product line complies with:
EN779:2012 (Europe)
ANSI/ASHRAE 52.2-2012 (USA – MERV equivalent)
GB/T 14295-2008 (China)
Ideal for: Automotive paint booths, pharmaceutical cleanrooms, hospital HVAC systems, industrial ventilation, and high-humidity environments.
| EN779 Grade | Avg. Efficiency @0.4μm | Min. Efficiency @0.4μm | Approx. MERV (ASHRAE) | Typical Applications |
|---|---|---|---|---|
| M5 | 40-60% | — | MERV 10 | Pre-filtration, light industry |
| M6 | 60-80% | — | MERV 11 | General HVAC, warehouses |
| F7 | 80-90% | ≥35% | MERV 13 | Hospitals, paint booths |
| F8 | 90-95% | ≥55% | MERV 14 | Cleanrooms, labs |
| F9 | ≥95% | ≥70% | MERV 15 | High-grade cleanrooms |
Filtering Mechanism
- Inertial Impaction
- Captures large particles (>1μm) via fiber collision.
- Diffusion
- Traps ultrafine particles (<0.5μm) through random motion.
- Electrostatic Attraction
- Enhances efficiency via charged media (removed during EN779 testing).
Why EN779:2012 Matters Globally
- It’s the most widely referenced standard outside North America.
- Requires static elimination before testing → ensures real-world performance.
- Defines M5/M6 as distinct from old F5/F6, aligning with modern filtration needs.
For North American clients
Our F7–F9 filters meet MERV 13–15 under ASHRAE 52.2.
FAQs
What’s the difference between EN779 and ASHRAE 52.2?
EN779 uses average efficiency at 0.4μm; ASHRAE uses MERV based on particle size groups. We provide cross-reference data.
Can your M5 filters be used in high-humidity areas like Southeast Asia?
Yes. We offer hydrophobic glass fiber media and corrosion-resistant frames (aluminum/galvanized steel).
Do you support custom sizes for European AHU systems?
Absolutely. We manufacture to EU nominal sizes (e.g., 592×592mm) and NA sizes (24×24 inch).
Are your filters fire-rated?
All glass fiber media pass UL 900 Class 1 or DIN 4102 B1 fire safety standards.
How do I choose between bag and V-bank filters?
Bag filters: lower cost, easy replacement. V-bank: higher capacity, longer life, ideal for large AHUs.
- ✅ Export Experience: Serving clients in USA, Germany, UAE, Mexico, Vietnam, Brazil
- ✅ Certifications: ISO 9001, UL Fire Rating, RoHS Compliant
- ✅ Custom Solutions: OEM/ODM supported for global system integrators