TECHNA-DUC® is PTM’s premier, patented premanufactured interlocking panel system for outdoor duct insulation that provides up to an R16 Thermal rating, is triple sealed to prevent condensation which helps prevent biological growth, is maintenance free and backed by a 20 Year Material & Service Warranty. Techna-Duc has also proven to reduce energy consumption of Air Handling Units (AHU) by as much as 25%. KOOLDUCT® is a Phenolic Foam board used for HVAC interior / exterior duct systems that combines the duct fabrication with the insulation process while providing less than 1% air leakage, a 25/50 Flame and Smoke rating UL 181, an R-6.0 @ 7/8 thickness and R-8.0 @ 1 3/16 thickness meets SMACNA class 3 requirements. KoolDuct® on average is also 85% lighter and saves approximately 6-8 inches of ceiling grid space reducing architectural weight load while eliminating the need for any exterior insulation. KOOLDUCT® is also more thermal efficient, is LEED eligible (utilized in the construction of the USGBC located in Washington, DC), helps prevent mold and mildew due to its special formulated anti-microbial silicone and the elimination of moisture, and has been proven to reduce Air Handling Units (AHU) fan operation by as much 20%.