These are systems in which, as specified in TS-7363, the flue gas ducts of multiple units are connected to a common flue via a horizontal collector, and the flue gases are discharged into the atmosphere through a common chimney.
Turkey
The number of condensing boilers that can be used in cascade systems—which can be manufactured as MATSINGLE or MATDOUBLE—for wall-mounted boilers (up to 9 units) and floor-standing boilers (up to a specified number of units) must be determined based on reports issued by accredited organizations or selected according to the results of flue gas flow dynamics calculations in accordance with TS EN 13384-2. For the drainage of condensate formed in the flue gas line, the connections between the flue duct and the chimneys must be made with a minimum horizontal slope of 3°.