DuraVent FasNSeal Flex 5" Stainless Steel Coupler btu11601 and the compact

and the compact

250 square feet and controlled by a factory installed thermostat

Robust galvanized steel design with adjustable feet

Use an adapter to attach DVL or DuraBlack to the support box

DuraVent FasNSeal Flex 5" Stainless Steel Coupler btu11601 and the compactMade from super ferritic stainless steel. Corrosion resistant. Manufactured with a sure seal locking seam for superior strength and flexibility. The smooth inner wall provides for no output reduction, allowing for full appliance efficiency, ease of cleaning and regular maintenance. The smooth inner wall optimizes gas flow, minimizes back pressure, and facilitates condensate management. Only flexible chimney liner listed to UL 1738 standard. What's