I still havent gotten around to insulating yet. Congrats
A/C when one is USED to it can sort of blind a person to alternatives.
Started uber-insulating in stages years ago. Saving my A** now it is, so do not delay!
Roughly 3 ton, net normally does the whole 3-level split residence @ 75 F AND "mostly" the shop @ 80-83 F. Window unit available for when running machines or door too often opened of a hot day.
12 years in, main system just took a dump around beginning of July. Too busy to find the leak and fix. Too hot most days to want to.
Previously, I'd only "played at" use of managing night-air. This go, I am dependent on it.
WITH that uber-insulation.. pulling night air through, every night, closing-up, daytimes, I am holding 8 to 10 degrees below daytime peak. Worst days, I kick-in a 10K BTU "portable" for the bedroom, another for this den.
Shop is around 77 F coming up 4 AM, local, upper floors of the residence about 79 F, both still dropping.
Out there in PM land at this time:
Davis-Monthan reports 75-76 nightime lows for Tucson all this week. 96 F daytime highs.
Brenham Municipal down Texas way 74-77 nightime lows, 90-94 daytime highs.
Running machinery WILL push a LOT of heat into the space, of course.
Even so, I do believe it is time for me to finish the last 20% of the insulation, automate the night air / day air approach with powered vents & fan controls, even with the A/C repaired.
I've been handed proof by accident of central air FAIL that BOTH are well worth the effort.
My late parents no A/C until their 80's, would, of course, count me DAFT for forgetting what has so long been known, but there you are.
We do that sort of thing.