UL 1738|ULC S636

• Features fully unitized, twist lock construction in 3 in Dia It can be used in both vertical and horizontal installations Stainless steel welded seam inner wall, combined with a galvalume welded seam outer wall Inner and outer are sealed with O-ring gaskets For use with condensing natural gas or propane categories II, III and IV appliances

An economical venting solution for condensing and non-condensing appliances, the Concentric venting system (CVS®) features a UL 1738 approved super ferritic stainless steel inner wall. The proprietary twist lock connection eliminates use of clamps or mechanical fasteners and saves installation time. Only one penetration is needed through the roof or the wall for both exhaust and combustion air. Multiple pipe lengths and telescoping pipe extensions eliminate field cutting of pipe. CVS® is the only concentric vent system to incorporate O-rings on the inner wall and outer casing to prevent exhaust or combustion air leakage. Custom adapters are available to transition from co-linear to coaxial venting systems. The built-in condensate management system prevents standing condensation. The Concentric venting system (CVS®) is a fully sealed, gas-tight system to deliver superior performance with the heating unit.