Minipleat cassette filters – high-efficiency HVAC air filters (M5–F9)

Minipleat cassette filters – advanced air filtration for high air quality requirements

Minipleat cassette filters are high-efficiency air filters designed for ventilation, heating and air conditioning systems where higher air purity and stable system performance are required.

By using an advanced minipleat filter construction, these filters provide a significantly larger effective filtration surface compared to conventional pleated cassette filters. This enables efficient removal of fine dust fractions while maintaining a low pressure drop, making minipleat filters an ideal solution for demanding HVAC and industrial environments.

Filtration performance and efficiency

Minipleat cassette filters are available in filtration classes M5 to F9, allowing precise alignment with air quality requirements.

The innovative filter medium used in minipleat filters differs from traditional pleated media, enabling use in higher filtration classes while maintaining mechanical stability and airflow efficiency. This makes minipleat filters suitable for applications where standard pre-filters no longer provide sufficient performance.

Minipleat construction principle

The minipleat design increases the number of pleats per filter, maximizing the filtration surface within a compact frame depth. This construction results in:

• Higher dust holding capacity

• Longer service life

• Stable airflow characteristics

• Reduced frequency of filter replacement

As a result, minipleat cassette filters support both air quality improvement and operational cost reduction.

Filter media and materials

Minipleat cassette filters use a fiberglass filter insert, selected for its high filtration efficiency and stable performance under variable operating conditions.

Key characteristics of the filter media include:

• High dust absorption capacity

• Moisture resistance

• Flame-retardant properties (F1 according to DIN 53438)

• Long operational lifetime

Energy efficiency and system protection

Thanks to their low pressure drop, minipleat cassette filters contribute to reduced energy consumption in ventilation systems. Lower airflow resistance translates directly into energy savings, improved fan efficiency and reduced operating costs over the filter lifetime.

Typical applications

Minipleat cassette filters are widely used in environments where high air quality and reliable system operation are essential, including:

• Hospitals and healthcare facilities

• Office buildings

• Schools and educational institutions

• Theatres and public venues

• Shopping centres

• Hotels

• Paint shops and coating installations

• Pharmaceutical, food, automotive and machinery industries

System integration

Minipleat cassette filters are typically installed as high-efficiency pre-filters or main filters, depending on system design and required cleanliness level. They are often used upstream of HEPA filters to reduce particulate loading and extend service life.

<p> In multi-stage filtration systems, minipleat cassette filters are commonly combined with <a href="/collections/hepa-filters">HEPA filters</a> or installed downstream of <a href="/collections/cassette-air-filters">standard cassette filters</a> to achieve optimal air quality and system efficiency. </p>

Custom dimensions – manufactured to order

Minipleat cassette filters supplied by Filtra International are manufactured to order and can be delivered in custom dimensions.

• Custom length × width × height (mm)

• Suitable for new installations and retrofit projects

• Compatible with standard and bespoke HVAC housings

Manufacturing origin & quality

Minipleat cassette filters supplied by Filtra International are manufactured in Europe, ensuring:

• Consistent production quality

• Compliance with European manufacturing standards

• Reliable delivery and traceability

Product configuration & quotation

Minipleat cassette filters are supplied on a quotation basis, allowing configuration of:

• Filtration class (M5, M6, F7, F8, F9)

• Exact dimensions

• Required quantity

This approach ensures optimal alignment with system requirements and operating conditions.