We have recently purchased a home, not realizing how strong of a musty smell there was in the basement family room. We have a 3 foot crawlspace, under half of the house from where the smell is entering the family room. The floor in the crawlspace is full concrete, no visible moisture or moisture marks, no mold growing anywhere. One thing we have noticed is that there is no air circulation in the crawlspace, ie. no fresh air is entering the crawlspace; Could this be the problem? If so then how do we fix it? Any other ideas on how to get rid of the smell? Thank you.