To improve workability of an exhaust pipe, and reduce exhaust loss of high temperature gas to be exhausted, and further provide a humidifying function.
The present non-open type heating machine 1 includes a waste heat recovery device 20 in which water is brought into contact with an outer surface of an exhaust pipe 3 located in the vicinity of an outlet of a heat exchanger 6 to lower the temperature of exhaust and part of heat of the exhaust is incorporated into a room. The waste heat recover device 20 includes a water tank 21, an exhaust tube 3a disposed in the water tank, and an open/close type cover 22 for opening and closing an opening of the water tank. Water in the water tank 21 is vaporized to supply vapor into the room whereby a humidifying function is additionally provided. Further, a heat insulation material of the exhaust pipe 3 is simplified and omitted, and further a material may be changed to inexpensive resin.
GOTO NOBUYUKI
KUBO NOBORU
