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Here‘s The Logic Behind 3 blades and 4 blades of ceiling fan
Ceiling fans are much more than just a decorative element that hangs from the ceiling, yet appearance is the first thing you notice. And since there are so many different styles to choose from, you might be tempted to just close your eyes and pick one. But the purpose of a fan is to circulate air, without blades your fan would be useless.
Now you might have noticed, fans come with both 3 and 4 blades depending on the place where they are being used. In India, we usually have them with 3 blades. But the one’s with 4 blades, which are mostly used in the US and colder areas, are not just designed that way to look different. There’s a reason behind it.
In US, the sole aim of a ceiling fan is to supplement the air conditioner. Which is why the fan, which is slower than the one with 3 blades, serves the purpose of keeping air circulation in the room. The 4 blades move a large mass of air.
However, In India, the fan is mostly used as a stand-alone appliance creating a convective cooling effect. Being lighter, the fan operates at a higher speed and is also energy efficient.