This type of flue system comprises three layers. The innermost layer is typically stainless steel, designed to withstand high temperatures and corrosive byproducts of combustion. This is surrounded by an insulating layer,... Read more »
This construction, employed in venting systems, comprises two concentric tubes with insulation material filling the space between them. The inner tube conducts exhaust gases, while the outer tube provides structural support and... Read more »
