what is duct board used for
Duct Board - R-6 features fiberglass construction with an FSK backing for sturdiness over time. Cut this duct board to size and use it to build your own HVAC fittings or trunk duct, and then assemble it with fiberglass weave and mastic or duct-board-approved duct tape for a convenient solution to your ducting problems. 1  Fiberglass construction with FSK backing for increased durability.
Product Overview. This Master Flow 24 in. x 24 in. x 24 in. Duct Board Plenum Kit - R6.0 lets you easily create an air mixing chamber for your furnace before your ventilation system accepts it. The duct board reduces ventilation system noise and reduces condensation for improved performance. Its high 6.0 R-value provides thermal efficiency.