I see dust under the baseboard but not much. And also, sometime I can smell "crawlspace" like smell but I am not very sure.
How to technically test the air pressure in home? Even more, how to technically test the air flow in home?
Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. It only takes a minute to sign up.Sign up to join this community
In short, you want to use or rent a manometer.
I suggest reading this article ( http://contractingbusiness.com/archive/how-measure-building-pressures ) as it details the differences in levels room to room and what the ideal pressure should be in vented and non vented areas, ie kitchen/bathroom as opposed to bed/living room.
As for the dust under the baseboards, that can be due to improper cleaing during construction of the dwelling.