Crawl Space Repair - Power vent fan

These vents have built in fans. The biggest problem with them is that people buy them to try and dry out the crawlspace and they just aren't powerful enough. All they really do is use up electricity. You have to take a look at the whole picture, these fans are trying to dry out the entire house. Would you use something that size to cool off while sitting on the couch? Probably wouldn't have much of an impact. It is better to save your time and money, there are better ways to get your crawlspace dry.