We have always been interested in energy conservation, and also keeping our electric bill down. We have an all electric newer home, with a geothermal heat pump. We keep the heat at 68 or 69 in the winter, and when we turn the air on, it's usually around 75 or 76. We haven't turned it on yet this year, but it was 80 in the house yesterday in late afternoon. It had cooled off to 71 in the morning. We have good cross-ventilation with the windows in our house. But mostly I just LOVE to have the windows open and hear the outside sounds. I hate having to close it up in the summer for the air conditioning - but eventually we will.