I never had one in my house.But I went to a friends to stay for the summer and It kept the house nice!!:) I was able to relaxe in the house without being to hott or tooc old I was always comfterble.I didn't have to spend mt whole time lounging in a pool just to stay cool I was able to do things around the house cook over a stove wihtout being too hot and coming home from my work able to relax.