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
O ISO 16890 standard is currently the most widely adopted global standard for general ventilation filters.
Principais recursos:
- Classifies filters based on PM1, PM2,5, e eficiência PM10
- Reflects real atmospheric dust conditions
- Replaces older standards like EN 779
Sistema de classificação:
- ePM1
- ePM2.5
- ePM10
- Grosso
👉 This standard provides a more realistic evaluation compared to traditional methods.
2.2 EM 779 (Padrão legado)
EM 779 was previously used in Europe, classifying filters as:
- G1–G4 (filtros grossos)
- F5–F9 (filtros finos)
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:
| Classificação | Faixa de tamanho de partícula | Aplicativo |
|---|---|---|
| Grosso | >10 μm | Pré-filtração |
| ePM10 | ≤10 μm | Commercial HVAC |
| ePM2.5 | ≤2,5 μm | Indoor air quality control |
| ePM1 | ≤1 μm | 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 Eficiência de Filtragem
- Based on particle size distribution
- Measured across multiple size ranges
4.2 Queda de pressão
- Indicates airflow resistance
- Directly impacts energy consumption
4.3 Capacidade de retenção de poeira
- Determines service life
- Evaluated through loading tests
4.4 Discharge/Conditioning Process
- Required in ISO 16890
- Simula condições operacionais reais
5. Test Rig Systems for Air Filter Evaluation
A complete air filter test system typically includes:
- Sistema de geração de aerossol
- Particle measurement instruments
- Sistema de controle de fluxo de ar
- Dust feeding system
- Software de aquisição de dados
These systems must provide:
✔ Stable airflow control
✔ Accurate particle measurement
✔ Repeatable test conditions
6. Solução recomendada: SCPUR SC-16890 Test System
For laboratories and manufacturers seeking compliance with ISO 16890, o
Sistema de teste de filtro de ventilação geral SC-16890 from SCPUR is a highly reliable solution.
Principais vantagens
- Totalmente compatível com ISO 16890
- PM1 preciso / PM2,5 / Medição de eficiência PM10
- Automated test procedures for improved consistency
- Fluxo de ar estável e controle de carga de poeira
- User-friendly software for data analysis
Aplicações Típicas
- HVAC filter manufacturers
- Laboratórios de testes terceirizados
- Instituições de pesquisa
- 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
Para fabricantes, investing in advanced test systems is essential to remain competitive in the global market.
8. Conclusão
With the adoption of ISO 16890, general air filter testing has shifted toward more realistic, particle-based evaluation methods.
Understanding testing standards, sistemas de classificação, and selecting the right test rig—such as the SC-16890—are critical steps in ensuring reliable filter performance and market compliance.
