https://www.ductless-mini-split-air-conditioner.org/ So, the comparison is between fan and AC. Which one to choose? The comparison between fans and ACs is one of apples and oranges. Even though both appliances are used for cooling, they are in no way similar. A fan does not lower the room temperature, rather only moves the air around. This leads to faster evaporation of moisture on your skin to achieve the cooling effect. In extreme heat, this won’t have any noticeable effect. In a room with air at 88 degrees, the air is still going to be 88 degrees. While with an AC, that air can be cooled down to 74 degrees or even below. A more efficient way to simultaneously achieve energy-saving and cooling to use a combination of an AC and a fan. Because of the cooling effect of the fan, you can set your AC at a temperature a few degrees higher than usual. Instead of the usual 74 degrees, you can have your AC at 78 degrees and still feel comfortable. For each degree raised on the AC thermostat, there is a 4% reduction in energy used. By increasing the temperature to 78 degrees from 74 degrees, the energy bill can come down from $400 per month to $330 per month. This is the ideal way you can get the best of both worlds!