Why Use Fiber Duct Versus Sheet Metal

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Why use fiber duct versus sheet metal.

Metal metal do it once and do it right. Fiber glass lined ducts. Some sheet metal air ducts are lined with an external or internal fiberglass duct liner. I have never liked duct board or ducts lined with fiberglass.

One of the major advantages of sheet metal ductwork is its staying power. Sheet metal friction is based on surface and joint. This is because they re more versatile and flexible. The idea of the porous insulation on the interior just doesn t seem like a good idea.

These three curves are shown in figure 1. We also use third party cookies that help us. The porous surface seems like it would affect air flow i understand properly sized this shouldn t be a problem collect more dirt than metal delaminate and come apart over time and are very hard to clean once dirty. Sheet metal fibergl ductwork fabrication installationbeach.

As for metal v flex for taps thats your call metal is better but flex is fine. We see to much duct board falling apart at the joins with nasty mold growing in it. Made from compressed fiberglass strands which are bonded with resin and covered with a foil laminate for moisture protection. We use all metal duct with wrap on the outside only.

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. Mastic is a gooey non hardening material with a consistency between mayonnaise and smooth peanut butter. Duct joints should always be secured with 8 sheet metal screws before seams are sealed with mastic. The blue curve is the sheet metal curve the green curve is that of unfaced or finished duct board and the yellow is our best estimate of the desi gn values for the laminate faced new generation duct board product.

Metal ducts are more rigid due to the nature of steel making them ideal to build an entire hvac system. Because of what it s made out of it tends to last a long time especially when it is properly cared for. Use to design the duct systems. The mastic is spread over duct seams with a disposable paintbrush putty knife or.

Sealing duct seams is messy work so wear old clothes. Flex ducts are better for existing trunk and branch heating and cooling systems. In comparison to metal duct flex duct is easier and faster to install.