DuraVent FasNSeal Flex 4" x 120' Stainless Steel Custom Flex Length d16.2 control zones

control zones

It may be used alone

7" x 20" / 40 x 40 x 50

Perfect for use in rooms with ceilings up to 96 1/2" in height

DuraVent FasNSeal Flex 4" x 120' Stainless Steel Custom Flex Length d16.2 control zonesMade 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