Exhaust tube holding member, exhaust structure for combustion apparatus, and method for installing exhaust structure for combustion apparatus

An exhaust tube holding member for holding an exhaust tube inside an exhaust pipe, said exhaust tube being connected to a combustion apparatus and introduced into said exhaust pipe, said exhaust tube holding member comprising:

• a main body including a first surface and a second surface opposing each other, and a rim surrounding a periphery of said first surface and said second surface,
• said main body being provided with an exhaust tube holding hole and an exhaust tube inserting notch, said exhaust tube holding hole has a circular shape when viewed from a direction orthogonal to the first surface, said exhaust tube inserting notch reaches said rim by extending in a radial direction of said exhaust tube holding hole, and said exhaust tube holding member comprises a boundary portion between said exhaust tube holding hole and said exhaust tube inserting notch, the boundary portion has a width smaller than the width of said exhaust tube inserting notch when viewed from a direction orthogonal to said first surface,
• said exhaust tube holding hole being configured to penetrate said main body from said first surface to said second surface,
• said exhaust tube inserting notch being configured to penetrate said main body from said first surface to said second surface and extend from said exhaust tube holding hole to said rim, wherein
• the exhaust tube is a flexible tube,
• an exhaust tube holding projection and recess portion matching the shape of the outer peripheral surface of said exhaust tube is formed on a wall surface defining said exhaust tube holding hole, and
• an exhaust tube inserting projection and recess portion matching the shape of the outer peripheral surface of said exhaust tube is formed on a wall surface defining said exhaust tube inserting notch.