You can pretty much only turn the AC off in Texas come the end of December and the beginning of January.Our old house did not have AC for years. It did have 10' high ceilings downstairs which helped. We put in ceiling fans and would open the windows at night to cool the house down. We closed them around 9 am before the heat got higher than the house temperature. We were in SoCal and except for several weeks during August the temperatures would drop at night to about 75-80. Eventually when we finished remodeling, we put AC in the upstairs only. Since the upstairs and downstairs were closed off by a fire door we could operate 2 systems which saved us a lot of $$ on AC. We just turned it on around 4-5pm to cool off the bedrooms before bedtimes. With the windows open the ceiling fans running we could turn it off around 10 pm when we went to bed. We do the same thing here - opening windows at night and turning off the AC at bedtime. This works here in SoCal, but we will have to keep the ac running in Texas probably. I hope we can turn the AC off or down at night because it bothers my sinuses to sleep under AC. Back in the day the reason all those old houses have large porches upstairs is because people used to sleep on them in the summer. And the reason they all have big, tall windows instead of doors opening onto them is because there used to be a tax on doors but not on windows. Using French windows r tall windows meant you could access the sleeping porches through the windows instead of through doors, saving the extra tax each year on doors. The family would drag their mattresses out onto the porches to sleep since it would be cooler and being up high you would get a breeze. Of course, in those days the mattresses were not innerspring! LOL
Come to Houston for one day and you will see how it would be impossible to live without an AC.I still don't have AC except in the car... and I hardly ever use it... . It gives me headaches unless it is really sweltering, and then I have a window open in the car with it on . Think it is because so many have it on too cold.. I have to work outside in the heat/cow barns/on the tractor.... can't take the 20-30 degree sudden temp changes.