| 摘要 |
Fresh air is provided for each heater and an exhaust gas duct is connected to each heater and leads to a position outside the room in which the heater is installed. Each exhaust gas duct is concentrically surrounded by a fresh air passageway. The exhaust gas ducts for a number of heaters installed in storeys arranged one over the other extend into an exhaust gas pipe, which extends upwardly outside the building. The fresh air passageways for respective heaters communicate with the atmosphere through wall openings. The wall openings, which communicate with the fresh air passageways, open directly into the atmosphere and are provided on the outside with a baffle plate.
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