Diameter is mostly personal preference. There's more selection in 52".
I installed Hunter fans in my last place and was very satisfied - they
were perfectly balanced out of the box and silent. This time I used 4
Hampton Bay 52" fans and they all wobble and make noise. Balance
doesn't help - the blades are all uneven on the vertical plane. The
one over my bed will slam back and forth in it's mount if I set it on
high. That, and it took the first two units to figure out how to slide
the blades into the snap-in holders without gouging the veneer. The
Hunter fans are harder to assemble but don't self destruct in the
process like the Hampton Bay fans.
I spent several hours trying to "balance" a ceiling fan with
taped on pennies only to find the problem changed with motor
speed. I then realized it was not a blade weight or length
problem. The problem was very simple - PITCH of the blades
I used a small light bulb (point light source) a few feet
away and above the blades. I hand rotated the blades
looking for the same reflection pattern on each blade.
Three were identical but the fourth was out of line, I
carefully bent that blade arm until the reflection matched
the other three. Fan has run true ever since, no wabble on
low or even high speed. Only took 10 minutes to fix.
pitch is the angle of "twist" from the leading edge of a
blade to it's trailing edge, at its end. The two edges
could be measured from the ceiling, or use a protractor with
a level. I wasn't going to waste another hour looking for
those tools when the light was at hand ;-)
-larry / dallas
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