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. Kit includes 4 sides and top. Open bottom to attach to air system. Product is \"knocked down\" for shipping and must be assembled.

Lets you build an air supply plenum chamber to allow air mixing directly from the furnace before the air is released into your ventilation system

Pre-cut design allows easy assembly using compatible foil tape (not included)

Insulation lining absorbs and reduces system noise and reduces condensation for improved ventilation system performance

R-value of 6.0 delivers optimal thermal efficiency