Difference between 3,4,5-Blade Ceiling Fan

Just to share with you my conclusion working with ceiling fans. These specs are taken off the KDK website for comparison purposes.

Revolution Per Minute (RPM)
3 blade - at high speed 231 to 282 RPM
4 blade - at high speed 170 - 208 RPM
5 blade - at high speed 153 - 190 RPM

Conclusion: the 3 blade fans naturally rotates faster than the ones with more blades. Faster rotation will also produce more air. I doubt the air is cooler made by those with more blades as its subject to the same ambient temperature within that room.

Air Volume Delivery
3 blade - Air Delivery (m3/min) : 236
4 blade - Air Delivery (m3/min) : 209
5 blade - Air Delivery (m3/min) : 204

Conclusion: less blades better volume delivery Wink. Doesnt always mean more blades more air delivery and hence cooler.

Motor Wattage Consumption
3 blade - Motor W at High 66.9 - 81.7
4 blade - Motor W at High 65.3 - 79.8
5 blade - Motor W at High 69.1 - 84.5

Conclusion: rather negliable across different blades really but the lower blades tend to consume less wattage.

Overall conclusion it seems the less blades the better? Only difference I can see is those with 3 blades typically comes with regulator and no frill designs. The 4 or 5 blades are nicer design plus the option of a remote control. Contrary to people's beliefs that more blades, more air volume delivery and thus, cooler. The design of the individual blades are also important to ensure better air volume delivery and quietness. I also note that those with more blades tends to be quieter but not that much.

The legth of blades for the 3 blades ones are typicall 60inch, whilst the 4 and 5 blades one are 56inch. Longer blades I guess means a better reach (bigger coverage area) to dispel the air driven downwards.

Motor is also important factor and should be at least 188 and thats where the RPM comes in. Make sure its at least sealed ball bearing kinds (pretty much the only kind available here in Malaysia).

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Thanks Batster for the interesting analysis. I guess its also quite logical considering that 3 blades would naturally be lighter than 5 bladed fans, so the lighter it is the faster it rotates, hence producing more air. If thats the case, i can safely say that if my objective for my fan is purely for cooling purpose, 3 blades would be best. 5 blades are more for decorative (and if i'm lazy to stand up to switch it on - i.e. with remote!). I know which one to get know.
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True true..more blades more expensive..but ironically as always, we're always inclined to buy the more expensive one due to the form, not so much on the function

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I was told that a 5-blade fan is quieter than a 3 blade fan. With a 3 blade, you can hear the sound of the blade "cutting" through air, whereas the 5 blade one is more silent.