Abstract
Filtration is a simple and effective way to capture particles of different sizes. According to ANSI/ASHRAE 52.2 standard, ventilation filters efficiency is tested for particles ranging from 0.3 to 10.0 μm. To our knowledge, performances of entire filters for nanoparticles are still very limited and particle size of 300 nm is commonly used as the Most Particle Penetration Size (for mechanical media). In order to evaluate the filter performance for nanoparticles, five type of filters (from MERV 8 to HEPA) were evaluated via two measurements: penetration and pressure drop. Results are consistent with previous experimental measurements on media and entire filters. These data show that the range of 150 to 500 nm is a better estimation of the MPPS, unlike the fixed diameter of 300 nm.
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