HEPA (High efficiency particulate air Filter), means the filter efficiency reaches 99.97% against 0.3um particle.
The HEPA filter uses high-frequency vibration equipment to evenly spread the fine particles of activated carbon between the HEPA filter paper and the non-woven fabric, and then formed by high-temperature hot pressing. This filter can not only purify gaseous pollution such as formaldehyde and benzene, but also remove particulate pollution such as PM2.5.