Mine is at 70 Fahrenheit from 6am until 10pm, but I often put it up to 80F if we feel a bit chilly in the evening. Luckily our bungalow is tiny and well-insulated, and in my view the heating (oil) isn't too expensive, although it's still about £600 for the winter. (Our Winter Fuel Payment covers some of that) My husband's race (as you may know) is African, and he feels the cold. Anything less than about 70F and like me he's shivering. But in W Africa, we're both quite at ease in 40 Centigrade with high humidity. We ought to go and live there really, but the endemic diseases would finish me off. I cannot sit in temperatures less than 65F. I shrivel up, tremble and get sleepy. Some of my friends' houses are so cool I keep my coat on. Our neighbours sweat like pigs when they visit us. It's interesting isn't it, how people need such a range of ambient temps in their homes?