US Patent 7749312 Air conditioning system

An air conditioning system comprising a gas-impermeable wall defining a space for air conditioning, and a selective separating member disposed in the wall as a part of the wall, having a function of allowing preferential permeation of oxygen and carbon dioxide and at the same time, blocking the permeation of hydrocarbon, nitrogen oxide, sulfur oxide and a fine solid component, in which the selective separating member comprises an organic polymer and satisfies the relationship of P1/P2>10 wherein P1 is the permeation coefficient of oxygen and carbon dioxide and P2 is the permeation coefficient of hydrocarbon, nitrogen oxide, sulfur oxide and a fine solid component.