Hope someone has an answer. We purchased a new home that had been sitting for 2 years with no heat/air. The crawl is encapsulated, sump pump (which of course wasn't running for 2 years) drainage issues, which we corrected. The house had a very bad musty smell when we purchased. We have added a dehumidifier in crawl and had a small amount of mold removed from the crawl, vented the HVAC into the crawl. Yet we still have a very strong musty smell in the house if it has been closed up for more than a few hours. The crawl still has a strong smell when we enter. I'm at a loss for the next move. I have a very sensitive nose and my eyes burn when I enter the house after it has been closed up with no heat or air for few hours to few days. Any suggestion would be greatly appreciated.