78�F guideline

What Is the Ideal Temperature for Home AC in the Summer? The ideal setting is not a single magic number, it is a workable range that balances comfort with operating cost. A reliable starting point is 78 F (26 C). From there, most homes find a sweet spot between 75 and 78 F, where air still feels crisp without driving up the power bill or overworking the system. Why a range instead of one setting? ...