Intertherm 901937 Flue Extension – 5″ x 16″ Outside

Intertherm’s Flue Extensions aid in extending the roof jack connection to the furnace. Flue Extension 901935 features an inside diameter of 5″, an outside diameter of 8.25″ and a length of 16″. Extension lengthens the roof jack connection an additional 16″. This extension is designed for exterior use and must be installed above the roofline. Connections cannot be installed inside of attics.