Blog Ungefähr ISO 16890 Sets Global Standard for Air Filter Performance

In the pursuit of healthy indoor environments, air quality often remains an overlooked factor. Particulate matter—especially PM1, PM2.5, and PM10—poses significant health risks. The ISO 16890 standard, introduced in July 2018 as the successor to EN 779, provides a scientific framework for evaluating and selecting ventilation air filters based on their ability to capture these harmful particles.

Significance of ISO 16890

This international standard represents a paradigm shift in air filtration by directly linking filter performance to health outcomes through particulate matter classification:

• Health-focused metrics: Unlike previous standards that measured generic filtration efficiency, ISO 16890 specifically evaluates filters against PM1 (0.3-1μm), PM2.5 (0.3-2.5μm), and PM10 (0.3-10μm) particles—the same pollutants monitored by the World Health Organization for their proven links to respiratory and cardiovascular diseases.
• Scientific IAQ management: The standard enables data-driven indoor air quality planning by matching filter selection to local pollution profiles and building requirements.
• Global harmonization: As an ISO standard, it replaces regional variations like EN 779, facilitating international trade and technological advancement in air filtration.

Technical Framework

The standard classifies filters into four categories based on minimum efficiency requirements:

• ePM1: ≥50% efficiency for PM1 particles (most penetrating size)
• ePM2.5: ≥50% efficiency for PM2.5 particles
• ePM10: ≥50% efficiency for PM10 particles
• Coarse: Below 50% efficiency for all PM sizes

Filters are further graded by their exact efficiency (rounded to nearest 5%), such as ePM1 60% or ePM2.5 85%. Testing protocols account for electrostatic effects and use polydisperse aerosols to simulate real-world conditions—a significant improvement over EN 779's single-particle testing.

Practical Applications

Proper filter selection requires consideration of multiple factors:

• Outdoor pollution levels: Urban areas with high PM2.5 concentrations may require ePM2.5 70-80% filters
• Indoor activity profiles: Hospitals need ePM1 filters for pathogen control, while schools may prioritize ePM2.5 filtration
• System compatibility: Higher efficiency filters increase airflow resistance, potentially requiring HVAC adjustments

Limitations and Future Directions

While representing significant progress, ISO 16890 currently:

• Excludes gaseous pollutants (VOCs, ozone) and microbial filtration
• Doesn't address filter lifespan or maintenance requirements
• Lacks provisions for emerging smart filtration technologies

The standard is expected to evolve with possible expansions to cover volatile organic compounds, standardized antimicrobial testing, and integration with IoT-enabled air quality monitoring systems.

Implementation Guidance

For optimal results:

1. Conduct baseline IAQ assessments to identify target pollutants
2. Reference local outdoor air quality data from environmental agencies
3. Balance filtration needs against energy consumption considerations
4. Consider multi-stage filtration systems for comprehensive protection

As buildings worldwide prioritize occupant health, ISO 16890 provides the essential framework for making informed decisions about air filtration—transforming what was once an afterthought into a cornerstone of healthy building design.