Rushing noise in ducts after new heat pump?
Hello. I posted earlier about replacing my aging heat pump, and the new unit was installed today. I had my old 2.5 ton unit replaced with a 2.5 ton outdoor / 3 ton indoor variable speed. The technician advised this match because of our high humidity and difficulties heating the whole house at one time.
Well the point was to move more air, but it didn't occur to me this would make more noise. When the unit kicks on, there is a rushing or roaring noise as air moves through the ducts and registers. The equipment itself is not that loud, just the ducts. I may have expected too much (everybody told me how silent it would be, compared to the old unit) but honestly, the first time it happened, I thought it was an airplane.
Is this something that can be adjusted by me or the technician? Is it just normal with the larger unit? Or does it indicate I've been sold the wrong system?