The SafeFlex Stainless Steel Lightwall Liner is the top choice for chimney professionals. Built from 316L stainless steel, this flexible, corrugated liner installs easily and provides long-lasting protection for wood, coal, oil, pellet, corn, and gas appliances.

UL Listed and backed by a Lifetime Warranty, SafeFlex delivers unmatched safety, durability, and value.

Key Features:

Flexible Design – Easy to maneuver and install
All-Fuel Rated – Safe for wood, coal, oil, pellet, corn & gas
Premium 316L Stainless Steel – Strong & corrosion resistant
Gas & Watertight Seal – Leak-free interlocking construction
Certified Safe – UL Listed to UL 1777
Lifetime Warranty – When installed by a pro

More Info:

Ships via freight (fees apply)
10–12" diameters sold in 5’ increments (max 20’ between couplers)
Full coil discounts (100’+) available—call for details
Ovalizing option: $2/ft
Upgrade your venting system with the SafeFlex Liner—trusted by professionals, built to last.

Guidelines for Sizing Fireplace Liners

Please Note: These are general guidelines for sizing a fireplace liner, and there are many other factors and considerations to take into account when working on the job site. Please contact our qualified Sales Team for more information. See Additional Product Info Tab for installation Instructions and Sizing Charts.

Liner Opening to Fireplace Opening (square inches) Ratio for Flue Liners:

Round Liner 12 : 1

Oval Liner 10 : 1

Square Liner 10 : 1

Rectangle Liner 10 : 1

Pre-Calculated Round Liner Chart at 12 : 1 Ratio

Liner Diameter	Liner Opening (square inches)	Fireplace Opening (square inches)
6”	28.26	339.12
7”	38.47	461.58
8”	50.24	602.88
9”	63.59	763.02
10”	78.50	942.00
11”	94.99	1139.82
12”	113.04	1356.48
13”	132.67	1591.98
14”	153.86	1846.32