DuraVent DuraFlex AL 3" Aluminum Coupler h44.375 sides and bottom of the

sides and bottom of the fireplace body

36" GCUF/GRUF Series Firebox

Model HRSQ25 Maximum BTU Output 25

Ring swirl handles

DuraVent DuraFlex AL 3" Aluminum Coupler h44.375 sides and bottom of theDuraFlex Aluminum An economical venting system used for relining masonry chimney for natural gas or liquid propane category I, draft hood equipped appliances, and appliances tested and listed to use Type B Gas Vent for a wide range of applications, including: natural gas fireplaces, gas fired furnaces, boilers, water heaters, and wall or space heating applications. Protects the masonry chimney from damaging effects of flue product condensation.