The Schebler Model SW is a single wall stainless steel exhaust for non-condensing applications. The ultra-light material makes relining masonry stacks efficient, easy and at a cost-effective price point. Model SW is a great choice for positive pressure boiler, water heater venting (UL 103), grease duct (UL 1978) and generator exhaust applications. Standard components may be used to complete the entire system. This is available in 304 & 316 stainless steel.