PROBLEM TO BE SOLVED: To provide inside/outside air introduction devices which can prevent the noise generated by sucking inside/outside air.SOLUTION: An inside/outside air introduction device 1 has: a housing 10 which can be installed in a heater 100 in a house； an outside air cylinder part 30 which is provided on one face side of the housing 10； an inside air cylinder part 40 provided on the other face side of the housing 10 and extending in the direction facing to the outside air cylinder part 30； a shutters 50, 60 provided in the outside cylinder part 30 and the inside cylinder part 40 respectively； and a sound absorption means 35 provided on inner wall faces of the outside cylinder part 30 and the inside cylinder part 40 and having an air layer inside.SELECTED DRAWING: Figure 4【課題】外気又は内気の吸引により発生する騒音を防止できる内外気導入装置を提供する。【解決手段】内外気導入装置１は、ハウス内の暖房機１００に設置可能な筐体１０と、筐体１０の一面側に設けられた外気用筒部３０と、筐体１０の他面側に設けられ、外気用筒部３０と対峙する方向に延びている内気用筒部４０と、外気用筒部３０及び内気用筒部４０にそれぞれ設けられたシャッタ５０、６０と、外気用筒部３０及び内気用筒部４０の内壁面に設けられ、内部に空気層を有する吸音手段３５と、を備える。【選択図】図４
