Tuff Duct is a unique outdoor ductwork product. We have encompassed everything that Engineers desire all the way to what the installing contractors demand. Engineers need a reliable leak proof system; connections are the #1 area for water infiltration. Tuff Duct has a patent pending connection cover which solves this, “Tuff Cap”. Engineers are always concerned with insulating outdoor ductwork, no worries! Tuff Duct is built with the best interior insulation (phenolic). Tuff Duct is available with sloped tops which shed unwanted water puddling. Architects and Owners are amazed with the vast color selections and our new crinkle textured paint. Best of all the Sheet Metal Contractor can install this product just like any other typical ductwork that they have years of experience with. Contractors don’t have to learn a new installation skill set. Finally, to top it off every TUFF DUCT system is built to SMACNA DUCTWORK STANDARDS.