The short answer is, they could be, if they’re too dirty!
Chances are, you don’t actually think about the condition of your home’s ductwork very often. After all, the ductwork in most homes is hidden from sight, traveling through spaces between walls and through the attic. Exposed ducts might look fine in commercial buildings with high ceilings, but that’s not the appearance for a cozy and pleasant home.
Residential air ducts need some consideration though. These ducts can suffer damage that can lead to poor heating and cooling performance that result in high utility bills. But physical damage isn’t the only way they can suffer—or rather, cause you to suffer. Dirty ducts are a problem too.