Duct Board Vs Sheet Metal

Proper aspect ratio for velocity and pressure drop is more important than sheet metal.

Duct board vs sheet metal.

Coat seal the interior of the duct board using an airless sprayer. It is not rodent proof. Odds are the efficiency airflow of your duct system can be greatly improved. And then beyond that it s the ductwork is made of cardboard.

The inner liner ribs restrict airflow more than sheet metal ductwork but not significantly. You need a pro for this. When homeowners receive quotes from hvac contractors they typically are given two duct replacement options sheet metal or fiberglass duct board. There actually are a few reasons most hvac techs prefer metal ducting.

If you re going this far perform a flowhood test to determine where how much improved airflow can be had. Duct board vs metal plenums supply is on perferable over the other. Replace redesign the duct board with sheet metal. Duct board is ok if the system design is correct and the duct and fittings are properly made and installed.

Poor fastened and sealed connections. I just don t know what that is. Up from the furnace comes a metal ducting duct work that goes up. It hasn t been on the market long enough to weigh in on its merits and shortcomings and will not be included in this comparison.

Sharp edges inside will cause material erosion. Flexible ducts are good for air quality because you are not breathing in fiberglass insulation lined ductwork like the fiber air ducts and they are mold and rust resistant unlike galvanized sheet metal ductwork. While flex ducts work best for short runs in a trunk and branch system metal duct works best for entire air distribution systems. Generally airflow is better with metal ducting after a couple of years typically because of the dust and.

25 feet should it be ductboard or metal and is hard pipe runs preferable over flex. I have never liked duct board or ducts lined with fiberglass. And then that goes up maybe i don t know a foot and a half 2 feet. If i am going to have a supply plenum run for approx.

The idea of the porous insulation on the interior just doesn t seem like a good idea. I don t know what kind of cardboard and i m sure there s a name for it. There is a third option phenolic duct that is made of plastic foam with a foil liner on the inside and exterior.