Did you know the top energy waster in your home is your duct work? I've heard statistics where as much as 95% of American homes has leaky duct work. Some statistics say that as much as 45% of the air that you are paying to heat or air condition your home is being lost through the duct work and over $25 billion doar is wasted every year in the USA on this problem.
I blame the builders and their practices of outsourcing. Back in 2018 I bought a brand new house. A few weeks later, i discovered a hvac duct running loose in the attic. The opening into the kitchen area was never cut. We were blowing cold air into the attic the whole time! Service area Orleans??
I blame misapplication of Duct Tape