Hot air space heater

A hot air space heater comprising:

• a frame having a front plate, a rear plate, a pair of side plates connecting said front and rear plates, and a top plate;
• an indoor air intake port provided at said rear plate;
• a hot air outlet provided at said front plate:
• said hot air outlet being formed so as to extend from a position in proximity to one of said side plates to a position in proximity to the other side plate in a lateral direction, and positioned lower than said indoor air intake port;
• a plurality of louvers arranged in said hot air outlet and longitudinally spaced from each other;
• a burner arranged in said frame in a manner to be close to said one side plate rather than at a central portion of said frame;
• a combustion chamber arranged on and communicating with said burner;
• a plurality of heat-exchange pipes arranged on an upper plate of said combustion chamber, and communicating with said combustion chamber and extending upward from said upper plate of said combustion chamber;
• an exhaust gas chamber arranged on and communicating with said plurality of heat-exchange pipes;
• an exhaust gas pipe arranged so as to connect to said exhaust gas chamber for discharging exhaust gas out;
• a duct structure arranged in said frame and having said upper portion of said combustion chamber, said plurality of heat-exchange pipes, and said exhaust gas chamber incorporated therein in a manner to define an air feed passage between said indoor air intake port and said hot air outlet;
• an accessory-receiving space formed between said duct structure and said other side plate of said frame for receiving a plurality of accessories including a fuel supply means and a controller used to conduct and control combustion at said burner;
• and
• an indoor air convection fan arranged in the vicinity of said indoor air intake port to feed indoor air therethrough into said air feed passage,
• wherein said hot air outlet has a first hot air outlet portion positioned in front of said upper portion of said combustion chamber and said plurality of heat exchange pipes, and a second hot air outlet portion laterally contiguous to said first hot air outlet portion and positioned in front of a region including said accessory-receiving space;
• wherein said duct structure includes:
• a first side wall arranged adjacent to said one side plate;
• a second side wall facing said first side wall in said lateral direction so as to have said upper portion of said combustion chamber, said plurality of heat-exchange pipes, and said exhaust gas chamber positioned therebetween and also facing said other side plate of said frame in said lateral direction so as to form said accessory-receiving space therebetween;
• said second side wall having a first side wall portion positioned on a side of said rear plate and extending along said first side wall and a second side wall portion connecting to said first side wall portion and extending in said lateral direction so as to form an extended air feed space laterally spreading along said second hot air outlet portion;
• a bottom wall positioned lower than said upper portion of said combustion chamber;
• a top wall having a main portion thereof positioned upper than said exhaust gas chamber;
• and
• a front wall positioned between a front end of said top wall and said hot air outlet and longitudinally extending along said front plate;
• wherein said duct structure is provided therein with an air guide arranged along said first outlet portion of said hot air outlet facing said upper portion of said combustion chamber and so as to guide part of air to be blown forward out of said first hot air outlet portion to said extended air feed space;
• and
• wherein said air guide has a plate-like member extending toward said extended air feed space along said first outlet portion, and said plate-like member is arranged so as to define a first air flow path between an upper edge of said plate-like member and said front wall and a second air flow path between a lower edge of said plate-like member and said bottom wall.