CI Plus 4" - 32" Diameter

Saf-T Vent® CI Plus is the leading commercial double-wall special gas vent system for condensing heating appliances  – 

Features and Benefits

  • Factory-built for high quality, durability and long life
  • Product and systems constructed of the highest quality, most corrosion resistant, super-ferritic stainless steel alloy available, AL29-4C® inner / 430 BA outer (mirror-like finish)
  • Alternate 316L stainless steel inner material is also available where AL29-4C may not be required
  • Meets all code requirements – tested and listed to UL 1738 (Special Gas Vent), ULC-S636 in Canada (Type BH Gas Vent), UL 641 / ULC-S609 (Type L Vent)
  • 4” to 32” diameters (ID) to fit the wide range of commercial applications
  • Double wall air and fiber blanket option for reduced skin temperature
  • Up to 550 °F maximum temperature rating with low clearance to combustibles; Zero clearance 194 °F – 230 °F (ref. install inst.)
  • Factory built-in silicone seal on 4”-16” diameter sizes; field applied silicone sealant for 18” – 32” diameters
  • Array of components and accessories designed to make installation simple and quick
  • Backed by Saf-T Vent Factory-Built Limited Warranty 


Typical Venting Applications

Commercial and Industrial


ANSI Category I, II, II, or IV appliances:

  • Boiler
  • Water Heaters
  • Furnaces
  • Brew Kettle Pots

Used in schools and government facilities, office buildings, hotels, hospitals, restaurants, multi-story tenant spaces, retail space, factories, warehouses.


Plumbing Engr Mag Ad and Q&A

Stainless Steel vs PVC Venting

Independent Articles
PVC Venting – Not A Good Idea   
PVC Venting – Not A Good Idea Part 2
Online Documents