Pedestal or box fans are standing fans with smaller sweep or the diameter. Smaller sweep lets them cover lesser area in a room if they do not rotate or have no swing option. Rotation along the central rod lets them cover more area, but it also causes intermittent airflows in various directions. They are typically placed in a corner or a particular location of the room, and if the room is big, the air may not reach all places. They are good for creating airflows in smaller areas or if airflow is required in a specific part of the room.
Ceiling fans are available in various sweeps or diameters. Sweeps determine the area the fan can cover. Regular fans, most commonly available in market or most commonly use, are of 1200 mm sweep, although there are smaller sweep fans available as well. Ceiling Fans typically cover larger area because they typically placed centrally in a room and also because of the elevation. Till now the most common fans available in the market typically consume 70-85 Watts. Even the ones of smaller sweeps consume similar wattage.
Coolers serve a very different purpose, especially in summers. Along with creating airflow they also cool the air by using water. They have a fan as well as a motor, and thus the electricity consumption is more as compare to any of the fans. Typical evaporative air coolers observed in the market are rated about 100-500 Watts which depends on the size and make.
Ceiling fans have a bigger market and being one of the appliances that have high usage in any house or office, they are getting lot more attention in terms of technology improvement. There is a lot of focus of the government in making ceiling fans efficient. Thus the wattages of ceiling stand fans are coming down by each passing day. However, as other types of fans are often looked at, there is a smaller market for these ceiling fans.