It’s not actually running the air conditioner but the fan, that is what I do in the winter time instead of running the heat. I like to sleep in a very cold room so what I do is open all of the windows in the master bedroom and bathroom since the air handler is in the bathroom so the cold air comes in and circulates throughout the house. I just run the fan since it is cheaper than the AC and the cool night air cools me down quite nicely. I don’t open the window in my bedroom at night because the bar behind me is really loud with partying monkees until about 2am. I put up a sound proof insulating foam contraption outside my bedroom window to block even more of the noise because it still makes its way through my double pane window and the sound of my air conditioner’s white noise. I also wear earplugs to cut out the noise and I have a small fan on my bed, which vibrates the bed and lulls me to sleep. I live in a Spanish village and asking people to be quiet while they are partying is a lost cause. This is a party town with a lot of free spirits and I am one of them. I need to clean my ductwork this weekend because I have been sneezing a lot and suspect that they are filled with dust again. I need to buy a HEPA filter one of these days as soon as I measure the current one.