The home-made purifier works to remove bacteria and harmful agents in the air.

The purifier, consisting of glass wool mixed with nano catalysts, ultraviolet lamp and blower, can sterilize up to 300 cubic meters of air per hour.

It is very useful at hospitals and foodstuff factories.

This device has already been applied to Pyongyang Wheat Flour Processing Factory, Pyongyang Cosmetics Factory, South Hamgyong Provincial People's Hospital and many other units of the country.