I've been working on my 2-part AC system for years, succesfully. It takes time, money, and patience. My attic unit's 11-speed blower assembly (that uses 3 of those at any one time) has been running on the 3 lowest speeds for a couple years. I finally had the last ducting project done just this week, and finally I'm ready to increase the speeds used during refrigeration to 3 and 4 from 2 and 3.
Almost all of my now-almost-30-years-old metal ducts are gone, replaced with larger-diameter flex ducting. EVERY time I have work done on the system, I tell the man we're trying to make the system QUIET, so large-diameter ducts that flow highish volumes of air at lower velocities should be used. What I just finished was the musicroom, where we had previously added a 2nd outlet. This week we plugged the original metal-fed outlet and added TWO flex-fed grilles. BINGO!...more air and less noise.
So yes, get someone to look at your system with a goal of reducing air velocity. Good luck. Where are you?
.
Almost all of my now-almost-30-years-old metal ducts are gone, replaced with larger-diameter flex ducting. EVERY time I have work done on the system, I tell the man we're trying to make the system QUIET, so large-diameter ducts that flow highish volumes of air at lower velocities should be used. What I just finished was the musicroom, where we had previously added a 2nd outlet. This week we plugged the original metal-fed outlet and added TWO flex-fed grilles. BINGO!...more air and less noise.
So yes, get someone to look at your system with a goal of reducing air velocity. Good luck. Where are you?
.