DuraVent DuraFlex Pro 12" x 25' Stainless Steel Custom Length o16 The heavy gauge carbon steel

The heavy gauge carbon steel weathers to a natural rich rust patina over time

The millivolt valve system doesn't use electricity

Artisan natural gas/liquid propane gas vent free fireplace system are available in 42"  Single Rate and 60" sizes with IntelliFire Plus IPI Control

x 18" Height Pan Size 28" Diameter Burner Size 15" ‘Cross’ Burner BTU 65

DuraVent DuraFlex Pro 12" x 25' Stainless Steel Custom Length o16 The heavy gauge carbon steelDuraFlex Pro is the ultimate in flexible steel liners for strength and flexibility. It features 20% more stainless steel per foot compared to other liners on the market. Its extreme flexibility facilitates problem free installations where multiple offsets are needed. DuraFlex Pro is available in 3 through 12 diameters in lengths, kits and custom lengths. DuraFlex Pro is manufactured utilizing highly corrosion resistant 316 Stainless Steel. Listed to