The 10”-16” diameters are listed to UL 103 Type HT. That means our 10”-16” chimney system is perfectly suited for hightemperature appliances, making it ideal for factory-built fireplaces, large masonry fireplaces, and boilers.
18" to 24"
The 18”-24” diameters are listed in the US to UL 103. In Canada, the 10”-24” diameters are listed to CAN/ULC-604. The DuraTech LDC may also be used on specific factory-built fireplaces listed to CAN/ULC-610 & UL 127.
DuraTech LDC features:
Available in 10” - 24”diameters
1” Thermal Tech insulation blanket
Outer Wall available in 430 Stainless Steel (.027”) or Galvalume (.029”) [US only]
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