Why Do Fans In America Have 4 blades But Those In India Just 3?
2 3 blade fans are cheaper and energy efficient
3 blade fans are even more energy efficient in comparison to 4 blade fans. 3 blade fans also provide a higher level of airflow than 4 blade fans. Moreover 3 blade fans will reduce the temperature of a room faster than the 4 blade counterparts by a minimum of 3 degrees and will also cost cheaper in terms of purchase.
The conclusion to the question is that while 4 blade fans are preferred to enhance the abilities of an air-conditioned, a 3 blade fans is required to cool a room on its own. Not everyone can afford an Airconditoner in India due to high energy costs, hence a 3 blade fan.