Newly built house weird smell
I've recently moved into a newly built house (built this year) and have noticed a weird lingering musty smell that's particularly strong as you enter the house in the front hall/furnace room/laundry room area. The house is three stories, and the entrance/furnace room/laundry room is on the first floor as you enter the house. The smell is hard to describe, but it smells stale musty/dusty. Ive been in the house several months and didn't notice the smell until really a month ago when we started using the AC on a regular basis.
The smell gets on clothes and they lose their "freshness" after air drying in the laundry room. The smell isn't as noticeable on the second floor (kitchen area) or on the third floor in the bedrooms. I did notice, however, that you can smell the smell if you smell the air coming out of the air vents on the outside of the house.
Does anyone know what could be causing this? If doesn't really smell like the "new" home smell with a newly built house... Strange that it's ready only started since the AC has been in use.
We have a humidifier on our furnace that's off and in the summer position right now.