Flex Duct Vs Sheet Metal Duct

Their shape and size also allows them to be installed in locations that would not accept full sized sheet metal ductwork.

Flex duct vs sheet metal duct. 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. 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.

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. 1 10 5 25 per foot insulated flexible duct 4 to 16 diameters used as branches or in radial duct attic systems 2 30 13 00 per foot round and oval sheet metal duct 3 to 8 diameters typically used for trunks in small homes and. While they tend not to last as long as sheet metal they are very cost effective. Some sheet metal air ducts are lined with an external or internal fiberglass duct liner.

Also i think spider webs are more likely to form in metal versus flex. Flexible ducts are made out of corrugated plastic often wrapped in insulation. While sheet metal ductwork tends to be a better long. Metal ducts are more rigid due to the nature of steel making them ideal to build an entire hvac system.

Here are the itemized costs for the most common types of ductwork and supplies needed to complete installation. Sheet metal ducts are less likely to incur dangerous mold and growths because their surfaces are non porous and smooth. Cost of installation supplies. 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.

I have seen many leaky metal ducts in crawl spaces as well.