For the past week, we haven't needed the heat really as we've been on a warm front. If it's rainy, damp and raw and in the fifties, we turn on the heat. My parents unfortunately have the coldest room in the condo so when the temperature drops, they wake up cold and turn the heat on to 73 which kills me as I have the warmest room in the condo. I often have to crack a window at night just to be sure I don't wake up from the heat.
However, when my sister visited, she had the windows open while she slept (it was winter). I actually woke up from the cold and had to walk carefully in the living room to shut the windows and raise the temp to 69 so I could sleep. She pretty much kept turning on fans and opening windows the whole time and I couldn't wait to get the place back so I could feel warm again. In the fall and winter, I like it set to 70. We don't lower it below that so the cats don't feel chill, especially at night. Our senior cat even has his very own super soft, fuzzy, blanket.
Laura