MANY YEARS AGO, I paid good money out of my own pocket to learn how to design a duct system. I won’t say to whom I paid this money, because I got ripped off. What I “learned” was how to find .1 on a ...

Just because ducts are designed a certain way doesn’t mean they will function as intended. Quick duct design rules have been around for a long time and aren’t going anywhere in the near future.

They’re not pretty and almost always hidden from sight, but air conditioning and heating ductwork are now proudly displayed in many homes. Like exposed wood beams that have become so popular, the ...