Intertherm Flue Extension 5in x 18" Inside 5in x 18ininside 903107. Flue Extension 901935 features an inside diameter of 5" an outside diameter of 8.25" and a length of 18". Extension lengthens the roof jack connection an additional 18". Make sure...
Intertherm Flue Extension 5in x 18" Inside 5in x 18ininside 903107. Flue Extension 901935 features an inside diameter of 5" an outside diameter of 8.25" and a length of 18". Extension lengthens the roof jack connection an additional 18". Make sure...