PROBLEM TO BE SOLVED: To provide an air supply/exhaust system of an air house or an air curtain which blows air into and inflates an air layer space by an electrically-driven fan to form a heat insulation air layer of a certain thickness thereby providing excellent heat insulation effect, and which off-controls the operation of the electrically-driven fan as required.SOLUTION: An inner air layer-forming film 20 has the another fixed end 20b which is extended from one fixed end 20a, and fixed to an opening edge on one side in front of an air exhaust port B. An outer air layer-forming film 30 has the another fixed end 30b which is extended similarly from one fixed end 30a and fixed while striding over the air exhaust port B. An inner air layer-forming film 21, of which the one fixed end 21a is fixed to the position at which the outer air layer-forming film 30 is fixed, has the another fixed end 21b fixed to an opening edge on the another side in front of the air exhaust port B. An air supply tube 6 is disposed at a position of the fixed end 21b or the inward side than the fixed end 21b so as to be adjacent to the air exhaust port B of the inner air layer-forming film 21. Air supply holes 6a are provided in the air supply tube 6.【課題】電動ファンで空気層空間へ空気を吹き込み膨張させ、一定層厚の断熱空気層が形成されて優れた断熱効果を期待でき、必要に応じて電動ファンの運転制御をオフ制御するエアハウス又はエアカーテンの空気給・排気システムを提供する。【解決手段】内側の空気層形成フィルム２０は、一方の固定端２０ａから展張した他方の固定端２０ｂが排気口部Ｂの手前の一側口縁部に止着され、外側の空気層形成フィルム３０は同じ一方の固定端３０ａから展張した他方の固定端３０ｂが排気口部Ｂを跨いで止着され、同止着位置で一方の固定端２１ａを止着された内側の空気層形成フィルム２１の他方の固定端２１ｂが排気口部Ｂの手前の他側口縁部に止着されている。一方の内側の空気層形成フィルム２１の排気口部Ｂと隣接する固定端２１ｂの位置又はそれより内方側の位置に給気用チューブ６が設置されている。給気用チューブ６には給気孔６ａが設けられている。【選択図】図１
