So I have one window unit air conditioner for my house. It's perfectly sufficient most of the time. I got it last year after my mother and sister came for a couple of days and we had a heat wave and we ALL were sweltering. So as soon as they left I drove 90 miles and bought one and installed it (hey, guys, it's cool NOW! Come back!) Well we're having a hot spell now, and the little thing just doesn't get the job done when it's not cooling off at night. If it gets cool at night, I just open my bedroom windown and put the fan in it, and close it up in the morning, and it stays cool all day. But if it's hot at night, it's useless. My son and his family were here Sunday-Tuesday and again, we SWELTERED. They slept in my room the first night and the second night, they slept on the floor in the living room because it was just too hot. So today I got ANOTHER AIR CONDITIONER for my room. It's humming away and it's making a huge difference. Happiness and joy are mine. Of course, now it's clouding up outside. Probably the heat wave is over. I don't care. I'm vegging in my room tonight and hopefully it will be a complete icebox.