DuraVent FasNSeal Flex 7" x 170' Stainless Steel Custom Flex Length w19 The whole machine has ETL

The whole machine has ETL certification and the plug has UL certification

the WRT4500 fireplaces feature a 30″ tall opening and full brick-to-face design with no visible interior sheet metal

Model Echelon II 60 Rev C Gas Fireplace - DV Item Number

to operate as a vent-free heating system

Flush Clean face design

DuraVent FasNSeal Flex 7" x 170' Stainless Steel Custom Flex Length w19 The whole machine has ETLMade 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