When we lived in Oregon it was 68 during the day and 63 at night. I remember a visit from my father-in-law who lived in Tucson and we turned it up to 73 and he bitterly complained to me that 'it was so cold in here it was a wonder the pipes don't freeze'. I remember calling my husband at work, nearly in tears, telling him about the conversation, so when he got home he asked his Dad if he was comfortable and staying warm enough. The answer 'yes - the temperature was pretty good and if he put his sweats on it was 'real comfortable'. Grrrrrrr! Now we live in Arizona and the temperature is kept at 72 since our blood has thinned and we need it warmer.