How much cfm does a 14 and 16 inch pipe pull and how much cfm return air do you need
The flexible duct will handle less then a lot of people seem to give them credit for. The 16 will handle about 1000cfm's at .02" of static pressure , depending on the length as Dan says. If you have a 14 and 16 on a 2.5 ton system you have enough depending again on the length and the path the duct takes straight line is the shortest distance between two points. It's also the best way to run any duct especially flex.
I'm sorry. I am just a home owner trying to determine if I have enough return air. I have a moldy smell coming out of my unit that is making me ill and I am trying to figure out what is causing it. I have had people check it and they say nothing is wrong. I was just wondering if maybe I did not have enough return air. I have 14 inch flex duct to a 20x20 filter and 10 inch flex duct to a 14x20 filter. I just wanted to know if this was adequate. Thanks.
I know of a company that has 2 locations-one in la and one in sacramento that MAKE sprial PIPE---Its special pipe alright and it takes a special machine to roll the pipe and fold and lock the seams then part the pipe in 10 ft sections