Air conditioning system

An air conditioning system comprising a permeable membrane, the air conditioning system performing at least one of gas supply to a space to be air conditioned through the permeable membrane and gas discharge from the space to be air conditioned through the permeable membrane,

• wherein the permeable membrane is an asymmetric membrane that is made of a cyclic olefin addition polymer obtained by addition polymerization of a cyclic olefin functionality siloxane expressed by a formula (1) given below, or by addition polymerization of the cyclic olefin functionality siloxane expressed by the formula (1) given below and a cyclic olefin compound expressed by a formula (2) given below,
• wherein a rate of a structural unit derived from the cyclic olefin functionality siloxane expressed by the formula (1) given below is 5 to 100 mol % of the addition polymer, and a number average molecular weight (Mn) is 10,000 to 2,000,000 in terms of polystyrene conversion measured by a GPC using tetrahydrofuran as a solvent,
• wherein, in the formula (1), R1 is a monovalent organic group without having an aliphatic unsaturated bond, and is identical or different from each other, s is an integer of 0 to 2, i is 0 or 1, and j is an integer of 1 to 4,
• wherein in the formula (2), A1 to A4 are each independently a hydrogen atom, a halogen atom, a substituent group selected from an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an alkoxy group, an aryloxy group and a halogenated hydrocarbon group, each having a carbon number of 1 to 10, or a polar substituent group selected from an oxetanyl group and an alkoxycarbonyl group, and
• wherein A1 and A2, or A1 and A3 may form, together with a carbon atom to which they are attached, an alicyclic structure, an aromatic ring structure, a carbon imide group, or an acid anhydride group, and k is 0 or 1.