Hello, I was looking for some help. We have a 3 ton HVAC unit with 5 ducts sending air. Two of them are 8", 2 are 6" and the last one is a 4".
The situation is that all of them are fairly quiet and smooth operating, but one of the 6" supply registers seem to be much stronger in terms of air coming out but also, this translates to this one being much louder than the others.
The 4" is actually the most quiet one as you can barely hear anything coming out of it. Consequently, it's also the least forceful when it comes to air coming out.
Does anyone have any thoughts or advice on how we can reduce the amount of air coming out of this supply and also to reduce the noise? All the ducts are flexible ducts but I do think this one tends to have some bends and turns which unfortunately is unavoidable.
Thank you in advance for any insight!