Flex Duct Vs Sheet Metal Duct

I ve only been building since 1995 so i can t say for certain why we left the sheet metal guys behind but i suspect it was manly for cost reasons.

Flex duct vs sheet metal duct.

I have seen many leaky metal ducts in crawl spaces as well. While sheet metal ductwork tends to be a better long. Sheet metal ducts are less likely to incur dangerous mold and growths because their surfaces are non porous and smooth. I don t know why but i have taken metal pipe apart to find a lot of crud which i don t think would live in flex duct.

This is because they re more versatile and flexible. While they tend not to last as long as sheet metal they are very cost effective. I am not hating on metal pipe but flex duct is more practical in many applications. In this video i ll make a case for going back to rigid metal ducts for your trunk lines and keeping your flexable ducts to the last 10 or less of a.

Some sheet metal air ducts are lined with an external or internal fiberglass duct liner. Flexible ducts are fairly easy to install and will often cost less than the rigid ductwork. Here are the itemized costs for the most common types of ductwork and supplies needed to complete installation. In comparison to metal duct flex duct is easier and faster to install.

Flex ducts are better for existing trunk and branch heating and cooling systems. Metal ducts are more rigid due to the nature of steel making them ideal to build an entire hvac system. Also i think spider webs are more likely to form in metal versus 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.

Cost of installation supplies.