Duct Board Vs Sheet Metal Plenum

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Duct board vs sheet metal plenum.

Sheet metal products 8 x 20 x 20 in. 26 ga duct plenum. Duct board is ok if the system design is correct and the duct and fittings are properly made and installed. Duct board r 6 features fiberglass construction with an fsk backing for sturdiness over time.

Consequently these glass strands can be carried with the airflow into your living space. Regardless of construction material the heart of an. There s no filter to catch these fibers on the supply side of your hvac system. The master flow 48 in.

Sheet metal friction is based on surface and joint configurations. It is not rodent proof. Some sheet metal air ducts are lined with an external or internal fiberglass duct liner. Those tiny microscopic glass strands can break off and enter the airflow.

The uncoated duct board classified as a medium roughness is controlled by higher surface friction. 16 x 25 x 24 in. 25 feet should it be ductboard or metal and is hard pipe runs preferable over flex. Fiberglass lining is used to insulate air ducts from heat loss or to avoid condensation in cases where the supply air is very cold or there is a high ambient humidity in the plenum.

Proper aspect ratio for velocity and pressure drop is more important than sheet metal. 26 ga plenum sleeve. The faced coated duct board behaves only slightly rougher than sheet metal but does not have joint inter ruptions so we estimated it as overall slightly 5 rougher. Typically hvac duct systems are made of sheet metal but other rigid heatproof materials such as fiberglass or insulated plastic may be used.

Sharp edges inside will cause material erosion. High air velocity will destroy the fiberglass material. If i am going to have a supply plenum run for approx.