When considering air filters, understanding their classification can impact your choice. In our article we will go through the difference between MERV, EN779 and ISO 16890.
What Is MERV Rating?
The MERV rating, which stands for Minimum Efficiency Reporting Values, is a North American standard used for evaluating how well an air-filter can capture particles ranging from 0.3 to 10 microns.
The higher the MERV rating, the better the filter is at trapping smaller particles, directly impacting your air quality and filter effectiveness.
What Is EN779?
EN779 is a European standard that classifies air-filters based on their ability to capture particulate matter. It categorises filters into three groups: G (coarse), M (medium), and F (fine), each reflecting the filter’s efficiency in trapping particles of various sizes.
- G1–G4: Coarse filters that capture larger particles.
- M5–M6 (F5–F6): Medium filters for smaller particles.
- F7–F9: Fine filters, designed for smaller, finer particles.
- By adhering to EN779, manufacturers can assure their filters meet specific performance criteria, enhancing product quality and safety.
In 2018, the international standard ISO 16890 replaced EN779, and it is now the commonly used standard.
What is ISO 16890?
ISO 16890 has replaced EN779 as the new standard to provide a more comprehensive and
globally applicable method for evaluating air-filter performance based on their ability to capture particulate matter of different sizes, making it more relevant for modern air quality needs.
It divides filters into groups based on their ability to capture particles of different sizes:
- PM1 (particles ≤1 µm)
- PM2.5 (particles ≤2.5 µm)
- PM10 (particles ≤10 µm)
Filters achieving less than 50% efficiency are labelled ISO Coarse. Whereas filters with over 50% efficiency are classified as ePM1, ePM2.5 or eMP10.
This standard guarantees a thorough and accurate classification of filter performance through rigorous testing processes.
Air-Filter Efficiency Classification
| Type Of Filter | MERV RATING | EN779 Classification | ISO 16890 | Particle Size | Common Applications | Available Products |
|---|---|---|---|---|---|---|
| Coarse | MERV 1 | G1-G4 | ePM Coarse (<50%) | < 20% for particles ≥ 10 microns | Pre-filters | Filter Mats |
| MERV 2 | ||||||
| MERV 3 | ||||||
| MERV 4 | ||||||
| MERV 5 | G3-G4 | ePM 50-70% | 20-35% for particles ≥ 3 microns | Residential & Commercial, HVAC Systems, Pre-filters, Spray Booths | Panel Filters, Filter Mats, Spray Booth Filters | |
| MERV 6 | ||||||
| MERV 7 | ||||||
| MERV 8 | ||||||
| Fine | MERV 9 | M5-M6 (F5-F6) | ePM10 65%-80% | 40-75% for particles ≥ 1 micron | Commercial & Industrial | Pocket Filters, Filter Mats, Spray Booth Filters |
| MERV 10 | ||||||
| MERV 11 | ||||||
| MERV 12 | ||||||
| MERV 13 | F7 | ePM2.5 >65% | 75-85% for 0.3-1.0 microns | Residential & Commercial, HVAC Systems | Bag Filters, Rigid Bag Filters, Pocket Filters, Filter Mats, V Cell Filters | |
| MERV 14 | F8-F9 | ePM1 70%-80% | 85-95% for 0.3-1.0 microns | Environments requiring high air quality (e.g. hospitals) | Bag Filters, Pocket Filters, Filter Mats | |
| MERV 15 | ||||||
| MERV 16 | F9 | ePM1 >80% | 95-98% for 0.3-1.0 microns | Critical applications (e.g., cleanrooms, laboratories, operating rooms) | Bag Filters, Rigid Bag Filters, Pocket Filters, Filter Mats |
By understanding air-filter classifications like MERV, EN779, and ISO 16890, you’ll make informed decisions to enhance air quality. No matter the application, these classifications guide you to the best choice.
Over 620 Filter Solutions and Counting At K Filter, we specialize in designing and manufacturing high-performance air-filters for a wide range of applications. With more than 620 filter models available, we support industries including heavy machinery, industrial dust collection, air purification, and paint booth systems. Our commitment is to deliver clean air solutions that meet the highest standards of reliability and protection.
