Exhaust structure for combustion apparatus

An exhaust structure for combustion apparatus, comprising:

• a combustion apparatus including a combustor unit configured to produce combustion gas, a blower unit configured to supply air for combustion to said combustor unit, and a housing configured to house therein said combustor unit and said blower unit;
• \
• an exhaust tube having one end and the other end, and connected to said combustion apparatus at the one end;
• an exhaust pipe configured to allow a part of said exhaust tube to be introduced therein from the other end;
• an exhaust adapter having an annular shape surrounding a through hole, attached to an outer circumferential surface of said exhaust tube by fitting said exhaust tube into said through hole, and attached to an inner circumferential surface of said exhaust pipe;
• a connection pipe configured to communicate a region between the outer circumferential surface of said exhaust tube and the inner circumferential surface of said exhaust pipe to an inner space of said combustion apparatus;
• and
• an exhaust member connected between said combustion apparatus and said one end of said exhaust tube, wherein
• said housing of said combustion apparatus is provided with a connection member for connecting said connection pipe,
• said region located between said outer circumferential surface of said exhaust tube and said inner circumferential surface of said exhaust pipe is positioned closer to said combustion apparatus than to said exhaust adapter,
• said region located between said outer circumferential surface of said exhaust tube and said inner circumferential surface of said exhaust pipe is fluidly isolated from a region within the exhaust tube and the outdoors,
• said connection pipe is formed of a different member from said exhaust tube and said exhaust pipe, and
• in the event there is a leak in the exhaust tube, exhaust gas in said region between said outer circumferential surface of said exhaust tube and said inner circumferential surface of said exhaust pipe is guided into an inner space of said housing via said connection pipe.