ISO ePM2.5 Filters

About ISO ePM2.5 Filters

ISO ePM2.5 filters are intended for the removal of fine airborne particles up to 2.5 micrometers in size. Under ISO 16890, this classification is used for filters that provide measurable efficiency against fine particulate matter that can affect indoor air quality, occupant comfort, and system cleanliness.

These filters are commonly applied in commercial and industrial ventilation systems where better particulate control is needed than ISO Coarse or ePM10 filtration can provide, but where HEPA-level filtration is not required.

Typical Particle Size

ISO ePM2.5 filters are designed to target particles:

• ≤2.5 µm

These may include:

• fine dust
• traffic-related particulate pollution
• combustion-related particles
• airborne particles affecting indoor air quality
• smaller contaminants that pass through coarse filters

Key Features

• Improved removal of fine airborne particles
• Better indoor air quality than coarse or lower-grade filtration
• Suitable balance of efficiency and pressure drop
• Helps protect downstream filters and HVAC components
• Supports cleaner system operation over time
• Suitable for commercial and industrial air handling systems

Typical Applications

ISO ePM2.5 filters are commonly used in:

• Office buildings and commercial HVAC systems
• Hospitals and healthcare support areas
• Educational facilities
• Data centers and technical environments
• Industrial ventilation systems
• Buildings located in urban or higher-pollution areas

Selection Considerations

ISO ePM2.5 filters are typically selected when applications require finer particle control than ePM10 filtration, but do not need the higher performance of ePM1 or HEPA filtration. They are often used in systems where both indoor air quality and operating efficiency are important.

When selecting ISO ePM2.5 filters, key factors include:

• target indoor air quality level
• outdoor air pollution conditions
• system airflow and pressure drop limits
• required service life
• downstream filtration needs
• overall maintenance strategy

These filters are often a practical middle point between basic pre-filtration and finer particle control.

ISO ePM2.5 vs Other ISO 16890 Grades

Compared with ISO Coarse and ISO ePM10 filters, ISO ePM2.5 filters are intended for finer particulate control. Compared with ISO ePM1 filters, they generally target a broader and slightly larger particle range.

This makes ISO ePM2.5 filters a useful option for applications where improved air quality is needed, but full fine-particle optimization is not always necessary.

FAQ

What does ISO ePM2.5 mean?

ISO ePM2.5 refers to a filter classification under ISO 16890 for filters that are effective at capturing particulate matter up to 2.5 micrometers.

Where are ISO ePM2.5 filters used?

They are commonly used in office buildings, hospitals, schools, technical rooms, and commercial HVAC systems requiring improved air quality.

Is ISO ePM2.5 better than ISO ePM10?

For finer particle control, yes. ISO ePM2.5 filters are intended for smaller particles than ISO ePM10 filters.

Can ISO ePM2.5 filters be used as final filters?

In many commercial and industrial HVAC systems, yes, depending on the required air quality level and system design.

Are ISO ePM2.5 filters suitable for urban environments?

Yes. They are often selected for buildings exposed to higher levels of fine particulate pollution.