I've read a lot of posts here about HO's duct sizing probably being too small. So, I was wondering: can ducts be too big? Assume that all the duct sizes are balanced throughout a house so that all ducts are oversized by the same relative amount (i.e. 30%).
Also, I'm asking more for the functional aspects. I realize installing duct work that is needlessly oversized would be a waste of money. However, I would think that, to a point, the labor would be basically the same but the cost of materials would be higher.
If there's no functional problems with balanced ducts that are oversized, then my "proposal" is that it would be worth a little more money for materials to reduce the risk of having undersized ducts and all the problems associated with it.
I know people will say that doing proper calculations will ensure the proper duct size, but these calculations seem inaccurate at times -- even with HVAC-Calc from what I've read in other posts. There also could be certain exceptions that cause a home to need large duct sizing, but it isn't noticed or compensated for.
Thanks for entertaining my curiousity,