Exhaust Tube Holding Member, Exhaust Structure for Combustion Apparatus, and Method for Installing Exhaust Structure for Combustion Apparatus

An exhaust tube holding member formed into an annular shape and configured to be supported by an exhaust pipe at a location closer to the side of an outer peripheral surface of the annular shape and to hold an exhaust tube on an inner peripheral surface of the annular shape, the exhaust tube holding member comprising:

• an annular portion formed with a through hole penetrating from a first end through a second end;
• an outward protruding portion formed into an annular shape and protruding peripherally outward from the outer peripheral surface of the annular portion;
• and
• a flange portion disposed closer to the first end than to the outward protruding portion, extending peripherally outward from the outer peripheral surface of the annular portion, and configured to have a thickness greater than that of the outward protruding portion,
• the flange portion being formed with a first annular groove surrounding the through hole.