An inflator (10) for generating inflation gases for a safety device includes a housing (12) having an internal cavity including a combustion chamber (20) and a filter chamber (22). A filter (62) is disposed in the filter chamber (22). A separating member (78) is disposed in the housing (12) on a first axial side (72) of the filter (62) and separates the filter chamber (22) from the combustion chamber (20). An insulating member (84) is disposed in the filter chamber (22) on a second axial side (76) of the filter (62). The second axial side (76) is opposite the first axial side (72). The separating member (78) is coupled to the insulating member (84).