DuraVent FasNSeal Flex 2" x 45' Stainless Steel Custom Flex Length chair The National Fuel Gas Code

The National Fuel Gas Code (NFPA54) and local codes require a minimum ventilation flow of 4 CFM per 1000 Btu/hr of heater input by either mechanical or gravity ventilation if the heaters themselves are not vented to the outside

One draws air in from outdoors to support combustion

Smooth wall liner is an easy to clean option with higher BTU capacity and superior draft performance

Soft padding to protect children from fireplace hearth sharp edges

Cap features swivel collar to adjust exhaust direction

DuraVent FasNSeal Flex 2" x 45' Stainless Steel Custom Flex Length chair The National Fuel Gas CodeMade 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