904 E. Pearson Street
Milwaukee, Wisconsin 53202
(414) 276-4822


McCotter Energy Systems represents the Heat Fab and AMPCO line of venting products.

Heat Fab Saf-T Vent CI Plus is the leading commercial double-wall special gas vent system made from superferritic stainless steel. With increased airspace between the inner flue conduit and the outer jacket, today’s CI Plus reduces the required clearance to combustibles and makes a more rigid flue pipe – large diameters are easier to handle.

AMPCO VSI - IVSI engineered systems are manufactured of high technology materials which resist the highly corrosive effects of combustion exhaust. Offering both standard pre-engineered products with custom-manufactured components, AMPCO offers a cost-effective venting system which requires little space and assembles easily in the field.

Saf - T Vent
  • AL29-4C® Stainless Steel
  • 4” through 32” diameters
  • AL29-4C® SS inner / 430SS outer
  • Patented Sure Seal closure system
  • 4” – 16” diameters – Factory built-in silicone seal
  • 18” – 32” diameters – Field applied silicone sealant required
  • Tested and Listed to UL 1738/ULC S636 by Underwriters Laboratories, Inc
  • Custom parts / fittings available
Model VSI and IVSI
  • Available in 304/316 SS Inner and Alum or 304/316SS Outer
  • Available in eighteen sizes, from 5" I.D. to 48" I.D.
  • Each component is shipped complete and ready for installation. Each ordered part includes Inner Vee Bands, Outer Channel Bands and all the necessary hardware.
  • Double Wall UL listed design
  • UL tested for positive pressure 60" WC.
  • Suitable for boiler breeching, chimney stack, engine exhaust, grease duct and food service venting.