Top of the Morning to you all. I have a customer who has a Trane heat pump system less than 1 year old in a very well constructed new home, and the air noise is just about enough to drive you out! I have been through the home, and cannot see anything that 'leaps out' as being the possible cause. Duct sizing is good, return air capacity is good, etc. As soon as you step through the front door, the air sound is very, very, noticable. Classic situation where they have to close registers in the bedroom to sleep and turn up the TV in the den to hear it. The ID unit is Model 4FWCA036A1000A matched with ID Model 4TWB3036B1000BA.

System does an excellent job of keeping home comfortable but the sound is maddening!
Any suggestions or has anyone else encountered similar problems and if so, what were your attempts at correcting?

All the best,