The Dundas Jafine E432 4in Aluminum Elbow Duct Connector can be used to vent most types of heating units.  The 0.016 gauge 4-piece aluminum construction is fully adjustable up to 90 degrees.  It includes one crimped end and one solid end to ease assembly.

This 4-inch angled elbow connector offers contractors more rigidity and better handling in venting applications. It is ideal for residential dryer venting and general ventilation applications.