HEPA HT filters – industrial absolute air filters for demanding environments
HEPA HT filters are absolute air filters supplied by Filtra International for use in industrial ventilation and air handling systems where very high air purity and operational reliability are required.
The HT designation refers to a reinforced absolute filter construction intended for demanding industrial environments, such as installations near furnaces, paint shops and coating lines. These filters are engineered to operate reliably under conditions involving airflow pulsations, mechanical stress and elevated thermal loads, while maintaining stable filtration performance.
HEPA HT filters are typically installed as the final filtration stage, protecting sensitive processes, products and personnel from fine particulate contamination.
Filtration efficiency classes (EPA / HEPA / ULPA)
HEPA HT filters are available in multiple efficiency classes according to EN 1822-1, allowing precise alignment with application requirements:
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EPA (E10 – E12) – efficient particulate air filtration for industrial and technical spaces
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HEPA (H11 – H14) – high-efficiency particulate air filtration for critical environments
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ULPA (U15 – U17) – ultra-low penetration filtration for the most demanding clean air applications
This range enables correct selection based on contamination risk, regulatory requirements and system design.
Filter media and internal construction
The filter media consists of high-efficiency waterproof fiberglass paper, manufactured from micro glass fibers combined with selected synthetic fibers. This structure provides:
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Very high particle retention efficiency
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Stable performance under variable airflow conditions
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Long service life in industrial HVAC environments
A minipleat design is used to maximize the effective filtration surface while maintaining compact external dimensions and controlled pressure characteristics.
Frame materials and sealing
HEPA HT filters can be supplied with different frame materials, depending on mechanical, environmental and installation requirements:
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MDF
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Galvanized steel
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Aluminum
Each filter is equipped with a flexible polyurethane gasket on the leading edge of the frame. This ensures a tight seal in the housing and minimizes the risk of bypass leakage, even under fluctuating airflow conditions.
Custom dimensions – manufactured to order
HEPA HT filters are manufactured to order and can be supplied in virtually any required dimension.
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Custom length × width × height (mm)
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Suitable for new installations and retrofit projects
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Optimized for existing housings and system layouts
This flexibility makes HEPA HT filters ideal for both standardized HVAC systems and bespoke industrial ventilation solutions.
Manufacturing origin & quality assurance
HEPA HT filters supplied by Filtra International are manufactured in Europe, ensuring:
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Controlled production standards
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Consistent and traceable quality
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Short supply chains and reliable delivery
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Compliance with European norms and expectations
Typical applications
HEPA HT filters are used in environments where air cleanliness is critical, including:
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Paint shops and coating installations
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Industrial equipment located near furnaces
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Pharmaceutical production
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Chemical industry
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Food processing facilities
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Electronics and micro-electronics manufacturing
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Laboratories and controlled industrial spaces
Installation context
HEPA HT filters are typically installed as the final filtration stage in multi-stage air treatment systems. For optimal performance and service life, upstream particulate filtration is recommended.
<p> In industrial HVAC systems, HEPA HT filters are commonly combined with <a href="/collections/compact-filters">compact filters</a> or <a href="/collections/pocket-filters">pocket filters</a> to reduce dust loading and extend filter lifetime. </p>
Product configuration & quotation
HEPA HT filters are supplied on a quotation basis, allowing configuration of:
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Filtration class (EPA / HEPA / ULPA)
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Frame material
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Exact dimensions
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Required quantity
This approach ensures optimal alignment with technical requirements and system conditions.