Listed below are links to websites of manufacturers of venting systems, conforming to the requirements of UL 1738 and ULC S636, for use with Laars's Category II, III & IV Appliances. Instructions for the installation of these vent systems are available on or through their web site.

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Saf-T Vent® CI or SC: http://www.heat-fab.com
Corr/Guard CGSW or CG: http://www.metal-fabinc.com
Z-Vent® SVE Series III: http://www.novaflex.com
FasNSeal®: http://www.protechinfo.com