Random material room HEPA filter that is installed with the air pressure is higher than the outside of the door cannot be closed, so completely. When the air system.
From random materials are installed HEPA filter, which is much higher than outside air pressure can not close the door to close it. When the weather system
The room is equipped HEPA filter random material which has higher air pressure outside so much that I can't close the door ให้สนิท. When open air systems .