We were spec'd for right between a 2.5 and 3 ton A/C. Due to the way our house heats up, room for loss improvements, humidity, and general temps here in Ohio, we went for the 2.5 ton system. This was 5 years ago. No problems to mention with this system, always keeps the house comfy although it certainly has limits. It has been unusually hot lately and there have been a couple days the A/C has run non-stop to maintain 75° inside. It has fun stright for over 12 hours on some days. Usually, the system runs a lot which was desired for humidity control, however it normally cycles when the temps are below the mid-90's.
I guess my question is....Is it bad for a system to run non-stop for long periods of time? Granted, I probably couldn't cool the house to 72° with this system, but I don't think anyone would want to. Our electric only goes up about $50 in the summer so even though it runs a lot, it's not costly. Any thoughts on upsizing the coil while we're modifying the system? I personally don't want to, but we may sell the place in a 5+ years and wouldn't want any problems from something like this.