How many hours per day should AC run?

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so I subject the family to 76 degrees. They don’t mind, it’s not that hot.

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There is certainly evil in this world.

Mine runs constantly during the day right now but chills out about this time of night and doesn't run nearly as much.

When its 100 degrees outside any unit is going to struggle to keep it in the lower 70's unless you are oversized for the most part.

Indicates your HVAC is not over-sized which is a good thing. Design temperature for BR, much of south LA, is 92 F, so most properly sized HVAC will run nearly non-stop when outdoor temperatures exceed design conditions for long hours.

What you need to understand is HVACs are designed and engineered to operate continuously when temperatures exceed design conditions - you can raise your thermostat to conserve energy/utility costs if you want, but you need not do that to give your equipment “a rest”.

Think of it like a automobile, short of stopping to fill up with gas and check fluids, you can drive it across country non-stop - you don’t need to spend the night at various locations along the way to give the engine, transmission, etc “a rest” b/c the vehicle is designed and engineered to operate continuously.

I just got my monthly report from my smart thermostat, it ran the ac for 298 hr's in June, that averages out to just a hair under 10 hrs. a day. My average indoor humidity was 49%.

This is with it set to go up to 80 at 8 am on weekdays, 75 for before I get home and 71 at 8pm. Gets adjusted accordingly but works well for the most part.

Mine seems to run 26 hours per day.

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My average indoor humidity was 49%.

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Ditto

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I set mine on 67 or 68 and leave it there all year

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Subtle I'm a multi-billionaire brag

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Subtle I'm a multi-billionaire brag

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Because I set my thermostat at 67 or 68 degrees all year long means I’m attempting a subtle OT billionaire brag? All I did was tell the truth. I had a $200 electric bill in May and a $230 bill for June. In the fall and winter that bill drops to around $120 to $140. My elderly neighbor likes to keep his house warm year round. My parents are the same way. I prefer to keep mine cold even in the winter. Now if I was getting a $400 to $500 summertime electric bill I’d have to bump that thermostat up some. Highest electric bill I’ve had in my six years at this house was around $275 one hot August. I don’t have a clue how long my AC runs a day. Not as much the last two weeks because we’ve been getting rain. Two weeks prior to that it was sunny and hot. Obviously it’s going to run longer when sunny and hot. In the winter the heat rarely cuts on. It’s not like it gets all that cold right off I-10 in Mobile.

Ha! That’s funny. I try to be respectful on the Home & Garden Board. On the OT it’s F U. Seriously I don’t know how long my AC runs. I do know what that bill runs when I pay it. I believe the OP is concerned about overworking his unit and I get that because those things always seem to break down on a Friday night, Saturday, or Sunday.