... aggregate or fiber glass added catechin, photocatalyst, cold catalyst, active carbon, vitamin C, aromatics, anti-sensitive or catalyzer. ... to dispose formaldehyde, xylol, phenols, ammonia sulfur etc organic gases. HEPA series filter material or air filter mediaAdopt ... filter element, catechin, anti-sensitive, vitamin C, aromatics, active carbon, photocatalyst, cold catalyst, nano silver to make HEPA ...