DuraVent, Inc.
Solutions for professional and commercial venting applications: all-fuel , stovepipe, direct vent, gas, polypropylene, special gas, pressure stack, grease duct.
Heat Fab
Commercial and residential venting products and systems for special gas vent applications; venting for boilers, water heaters, and furnaces; single-wall, double-wall, and polypropylene venting.
Security Chimneys International
Commercial and residential chimneys for heating boilers, domestic water boilers, and hydronic applications, as well as grease ducting.