Vacuum cleaner hepa air filter 1).High efficiency, low resistance 2).Easy to install, long service time ... formaldehyde, methanthiol, hydrogen sulfide etc, but also has the superstrong power to kill stubborn bacteria and fungus. Product Property:1).Broad ... . Application:1). Central air conditioner, air HFPA purifier, air cleaner, Fragrance machine etc.2). Medical nano silver masks, exposure suits ...