They ask that you limit your use of the AC from 7 PM until 8 AM (13 hrs.) and that usage is included in their rate. (From their website: Rates include weekly cleaning & linen change and use of air conditioning between 7:00 pm and 8:00 am). That's when most folks are in the apartments cooking and sleeping. If you're getting a later start you can shut off the AC and leave the bedroom closed up and it will stay cool for another couple of hours. You also generally have a very nice breeze, screens on all the windows, and ceiling fans in the main rooms. Electricity is expensive. Walther & Nicole are very accommodating. I'm sure they'll be happy to work something out with you if you have additional needs. Just drop them an email. I've stayed there multiple times and it's never been an issue, but it's good to make sure it will meet your needs up front. All IMHO, YMMV.