Not all crawl spaces should be vented to the outside! Ever see these vents on the side of a home? They allow outside air to enter the crawl space under the home. If a home that has crawl space vents also has an attic fan, I can almost guarantee the home has high humidity and is VERY uncomfortable. The hot, humid summer air is sucked into the crawl, then into the basement, through the house, through the attic and out the attic fan on the roof. Thus, creating a very high humidity situation that almost no AC system can overcome. Call us to find out how to solve this problem!!!