Basement Dehumidifier

I don't know if houses here in Texas have basements. Not that I know of uh uh! However, I have been to few houses that have basements, in Iowa for example most houses there have basements and I remember when I was there three years ago, my friend's parent inlaws used this basement dehumidifier for it was during Fall and mostly basements get moist in the ground. I am pretty sure of what they were using now that I see these humidifiers on the internet today. It may be three years since I've seen the thing but I still clearly remember it.