What does the filtration grade of an air filter mean?
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- Oct 18,2025
The filtration grade of an air filter represents its capability to capture airborne particles of various sizes, directly reflecting its performance and efficiency in air purification. Aurashu’s air filters are classified according to internationally recognized standards such as EN779, ISO 16890, and ASHRAE 52.2, ensuring compatibility with global HVAC systems and clean air requirements.
Filter grades typically range from coarse (G1–G4) and medium (M5–M6) to fine (F7–F9) and high-efficiency (HEPA H10–H14 or ULPA). The higher the grade, the finer the particles the filter can remove—from visible dust and pollen to bacteria, smoke, and microscopic aerosols.
Selecting the right filtration grade depends on the specific application:
Coarse and medium filters are suitable for general ventilation and pre-filtration.
Fine filters are ideal for office buildings, shopping malls, and industrial facilities requiring higher air quality.
HEPA and ULPA filters are used in cleanrooms, laboratories, pharmaceutical production, and hospitals where ultra-clean air is essential.
Understanding filter grades helps maintain indoor air quality, protect HVAC components, and improve system efficiency and longevity. Aurashu offers customized multi-stage filtration solutions to meet diverse industry requirements, combining performance, energy efficiency, and environmental responsibility.