On Nov 13, 12:43 am, " wrote:
We see ceiling fans with 3, 4 and 5 blades. Does blade number matter
for performance, quiet, vibration, etc?

Thanks

Lynn Willis
Indianapolis

Here's my response from an earlier thread regarding ceiling fan
blades:

Disclaimer: I don't work for a fan company so none of this is a
testmonial or sales pitch. It's just info...

Here's some quick info on ceilings fans, both of which include some
verbage on blades angles.


http://www.garbes.com/inform/fanfaq.html
http://www.ehow.com/how_110234_choose-ceiling-fan.html


Stolen without permission from http://www.hansenwholesale.com/ceili...anca/about.asp


*** Begin Included Text ***


"Don't let your ceiling fan leave you hot under the collar... Just
because a ceiling fan moves air doesn't mean it moves enough air to
keep you comfortable. The blade pitch (or angle) determines how much
air is moved when the fan is on. Some fans have blades with a very
shallow pitch because their motors are not powerful enough to handle
the extra demand made by steeper blade pitches. Casablanca fans use a
motor which is engineered to be more than powerful enough to operate
fan blades with a full 14 degree pitch. So you always get the right
amount of air to keep cool and comfortable."


*** End Included text ***


Interesting fact: The first 3 fans listed under the model section at
that site are 3, 4 and 5 blade fans. The 3 blade has an air flow
rating
of 4 out 5, while the 4 & 5 bladers are rated 5 out of 5. Casablanca
claims 5 is the best, but I don't know if that's their standard or an
industry standard.


Bottom line: If a fan isn't bragging about it's blade angle and motor
quality as selling points, that may mean it's not as steep or strong
as one would like. My guess is that no one is putting a motor that
can
handle a 14 degree pitch on a fan with an 8 degree pitch, if you know
what I mean.