Wall, system of highly clean rooms, production method thereof and construction

aa a aa a Provided are a system of highly clean rooms capable of continuously maintaining high cleanliness of air of class 1 or above and supplying enough oxygen inside the room for several persons to live in and a wall adapted to the structure of such a system.The system of highly clean rooms is provided with a living space and a space between the roof and the ceiling as subspaces of an enclosed space formed by a room . One of the lateral walls of the room is constituted of a wall with an internal space , which is a hollow wall. The internal space and the living space are in contact via an inner wall of the wall , and a gas exchange membrane is stretched in the inner wall . Furthermore, a gas flow path is provided inside the inner space and the gas flow path allows airtight communication between an opening provided on the lowest part of the internal wall and a gas entry opening of a fan filter unit provided on a ceiling wall inside the space between the roof and the ceiling.