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What does HEPA stand for?
HEPA stands for High-Efficiency Particulate Air. It is a classification defined by government and industry standards for filters that meet strict particle-capture benchmarks.
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What particle size does a HEPA filter capture?
A true HEPA filter captures at least 99.97% of airborne particles that are 0.3 microns in diameter or larger. This includes dust, pollen, mold spores, pet dander, and many bacteria.
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How does a HEPA filter work?
HEPA filters use a dense mat of randomly arranged fibers. Particles are captured through three main mechanisms: interception (particles following airflow hit a fiber), impaction (larger particles can't follow airflow curves and collide with fibers), and diffusion (very small particles move erratically and are trapped by fibers). Together these make
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Is a 'HEPA-type' or 'HEPA-style' filter the same as a true HEPA filter?
No. 'HEPA-type' or 'HEPA-style' are marketing terms with no standardized performance requirements. Only filters that meet the 99.97% efficiency standard at 0.3 microns qualify as true HEPA filters. Our filters are certified true HEPA.
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What is the MERV rating and how does it relate to HEPA?
MERV (Minimum Efficiency Reporting Value) is a rating scale from 1–16 used mainly for HVAC filters. HEPA filters exceed the MERV scale — they are sometimes described as MERV 17–20. MERV ratings and HEPA are different testing standards, so direct comparison requires care.
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Can HEPA filters remove viruses?
HEPA filters can capture many virus-carrying particles. Viruses often travel attached to larger respiratory droplets or dust particles, which HEPA filters trap effectively. However, standalone HEPA filtration should be considered one layer of a broader air quality strategy.
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Do your filters meet any certifications or standards?
Yes. Our filters are tested and certified to EN 1822 (Europe) standards, ensuring consistent performance across our product line. We can provide test reports and certificates upon request.
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What is filter efficiency and how is it measured?
Filter efficiency is the percentage of particles a filter removes from the air passing through it. It is measured using standardized challenge aerosols (typically sodium chloride or DOP) at rated airflow in a controlled laboratory setting. Our filters are tested at both rated and reduced airflows.
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What industries use your HEPA filters?
Our filters serve a wide range of sectors including healthcare (operating theaters, cleanrooms, isolation rooms), pharmaceutical manufacturing, semiconductor fabrication, aerospace, commercial HVAC systems, and consumer air purifiers.
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Can I use a HEPA filter in my existing HVAC system?
HEPA filters have higher airflow resistance than standard HVAC filters. Most residential and light commercial systems are not designed to push air through a true HEPA filter. We recommend consulting your HVAC engineer before retrofitting, or using a dedicated HEPA air handling unit.
