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- External flue extension is used to provide additional clearance between the flue and roof - especially useful in areas that receive heavy snowfall.
- SpecificationsFor External UseSuitable For Use WithRG1-RG7, RO1, M5SB, MG1E FurnacesTypeFlue ExtensionInner Diameter (Bottom)5-3/8 inInner Diameter (Top)5-1/2 inLength16 inManufacturerStyle CrestManufacturer #901937Outer Diameter (Bottom)8-3/8 inOuter Diameter (Top)8-1/2 in