Help me fix this horrible range hood duct termination/exit (6″ duct into an 8″ termination with no reducer or coupling)

Had a blower door test done recently.  Tech noticed unusual amount of air coming in around the chimney of my range hood.  I managed to get the chimney off and… Had a blower door test done recently.  Tech noticed unusual amount of air coming in around the chimney of my range hood.  I managed to get the chimney off and…Read MoreGreenBuildingAdvisor