Draught limiting and injection device

摘要

A draught limiting and injection device for supplying combustion air to a combustion appliance and discharging combustion gases of the combustion appliance to a discharge device arranged on the outside of a building. The draught limiting and injection device comprises an outer tube (14) for connection to the combustion appliance and the discharge device. The device further comprises an inner tube (20) for connection to the combustion appliance and functioning as injector (24). The inner tube opens into the outer tube, and a wall of the outer tube is provided with a first air supply opening (12) for supplying combustion air to the combustion appliance. The wall of the outer tube is further provided with a second air supply opening (32) for possibly supplying air to the discharge device to limit the draught. <IMAGE>