DuraVent FasNSeal Flex 8" x 75' Stainless Steel Custom Flex Length d21.63 Heat up quickly and evenly

Heat up quickly and evenly thanks to its 4777 BTU

2400 FS Black (Serial #s: 9894 and less)

clean-lined design combined with durable Fluid™ Concrete construction

but we have matching tank covers which are sold separately

DuraVent FasNSeal Flex 8" x 75' Stainless Steel Custom Flex Length d21.63 Heat up quickly and evenlyMade 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