Why AC Window Units Are Stuck In The Past

More than 65 percent of U. S. households have central air, but not in New York where 75 percent of the buildings were constructed before central air existed. Subscribe to CNBC: About CNBC: From Wall Street to Main Street to award winning original documentaries and Reality TV series, CNBC has you covered. Experience special sneak peeks of your favorite shows, exclusive video and more. Connect with CNBC News Online Get the latest news: Find CNBC News on