Summer is at its peak and heat waves are increasing day by day making AC compulsory. But still, many are without ACs. WILL IT BE FINE TO BE WITHOUT AC? If you're looking to save money on your energy bill and reduce your carbon footprint, turning off your AC during the hottest parts of the day can be a good option. However, if you're concerned about your home becoming too hot and humid, it's probably best to leave your AC on.