are specially designed and manufactured of certified materials according ”SOLAS” and “IMO”. These “MPB-D” dual-duct connection units are mainly used to mix the air from different airflow sources with different airflow capacities as well as different temperatures. Connection diameters are custom made on required airflows. If connection diameters are different, it always has a rotation ability. As an option air-flow regulation dampers can be installed in both or one of the duct connection. For more information, please contact This email address is being protected from spambots. You need JavaScript enabled to view it.