| 摘要 |
PURPOSE:To increase heating effect without taking cold air into a room, by a method wherein an air supply opening taking in outdoor fresh air is provided on the circumference of a combustion gas duct and the air is supplied into the room while heat of the surface of a chimney is being recovered. CONSTITUTION:Combustion gas of a heater passed through an indoor chimney 5 and an exhaust duct 8 consisting of an exhaust cylinder 4 and a radiating cylinder 6, and reached to an outdoor side chimney 7 is discharged outdoors. Fresh air is supplied forcibly from an air supply opening 11 of an outdoor side of an air supply cylinder 9 through a fan 2 an output shaft by operating an electromotive blower 3 and sent to a chamber 12 from a discharge side of the electromotive blower 3. The fresh air passed through a heat exchanger element 16 and is discharged from a discharge opening 14 of supply air of a supply air cover 13. In this instance, the fresh air supplied from the air supply opening 11 is heated once by the radiating cylinder 6 heated by the combustion gas in the inside of a main body 1. With this construction, circulation effect is brought to the titled fan. |
