Air filtration plays a critical role in maintaining indoor air quality across HVAC systems, industrial environments, and commercial buildings. To ensure reliable performance, general air filters must be evaluated according to standardized testing methods and classification systems.
This article provides an overview of testing standards, filter classification, and test rig systems, helping manufacturers and laboratories select the right solutions for performance validation.
1. What Are General Air Filters?
General air filters are primarily used in HVAC and ventilation systems to remove airborne particles such as:
- Dust
- Pollen
- Fine particulate matter (PM10, PM2,5, PM1)
Unlike HEPA filters, general ventilation filters focus on real-world particle size distribution, making their testing standards more application-oriented.
2. Key Testing Standards for General Air Filters
2.1 ISO 16890
IL ISO 16890 standard is currently the most widely adopted global standard for general ventilation filters.
Key features:
- Classifies filters based on PM1, PM2,5, ed efficienza PM10
- Reflects real atmospheric dust conditions
- Replaces older standards like EN 779
Classification system:
- ePM1
- ePM2.5
- ePM10
- Grossolano
👉 This standard provides a more realistic evaluation compared to traditional methods.
2.2 IN 779 (Legacy Standard)
IN 779 was previously used in Europe, classifying filters as:
- G1–G4 (coarse filters)
- F5–F9 (filtri fini)
Although now largely replaced by ISO 16890, it is still referenced in some markets and legacy systems.
3. Filter Classification Overview
Modern classification focuses on particle size efficiency, rather than only arrestance:
| Classificazione | Intervallo di dimensioni delle particelle | Applicazione |
|---|---|---|
| Grossolano | >10 µm | Prefiltrazione |
| ePM10 | ≤10μm | Commercial HVAC |
| ePM2.5 | ≤2,5 μm | Indoor air quality control |
| ePM1 | ≤1μm | High-performance ventilation |
This shift allows engineers to better match filters with real environmental requirements.
4. Test Methods and Key Parameters
To evaluate general air filters, several parameters are measured:
4.1 Efficienza di filtrazione
- Based on particle size distribution
- Measured across multiple size ranges
4.2 Caduta di pressione
- Indica la resistenza al flusso d'aria
- Directly impacts energy consumption
4.3 Capacità di trattenimento della polvere
- Determines service life
- Evaluated through loading tests
4.4 Discharge/Conditioning Process
- Required in ISO 16890
- Simula le condizioni operative reali
5. Test Rig Systems for Air Filter Evaluation
A complete air filter test system typically includes:
- Sistema di generazione dell'aerosol
- Particle measurement instruments
- Sistema di controllo del flusso d'aria
- Dust feeding system
- Software di acquisizione dati
These systems must provide:
✔ Stable airflow control
✔ Accurate particle measurement
✔ Repeatable test conditions
6. Soluzione consigliata: SCPUR SC-16890 Test System
For laboratories and manufacturers seeking compliance with ISO 16890, IL
SC-16890 Sistema di test generale del filtro di ventilazione from SCPUR is a highly reliable solution.
Vantaggi principali
- Pienamente conforme alla norma ISO 16890
- PM1 accurato / PM2,5 / Misura dell'efficienza PM10
- Automated test procedures for improved consistency
- Controllo stabile del flusso d'aria e del carico di polvere
- User-friendly software for data analysis
Applicazioni tipiche
- HVAC filter manufacturers
- Laboratori di prova di terze parti
- Istituti di ricerca
- Quality control departments
👉 The SC-16890 system ensures precise, repeatable, and standards-compliant testing, helping users improve product quality and meet international requirements.
7. Why Proper Testing Matters
Accurate testing of general air filters ensures:
- Compliance with international standards
- Improved indoor air quality
- Reduced energy consumption
- Better product competitiveness
Per i produttori, investing in advanced test systems is essential to remain competitive in the global market.
8. Conclusione
With the adoption of ISO 16890, general air filter testing has shifted toward more realistic, particle-based evaluation methods.
Understanding testing standards, sistemi di classificazione, and selecting the right test rig—such as the SC-16890—are critical steps in ensuring reliable filter performance and market compliance.
