On Mon, 07 Feb 2005 23:03:39 GMT, "habbi"
wrote:

I thought about that but the velocity of the air would increase creating
more noise. the other option would be to bend the fan blades to reduce the
pitch.


"Leo Lichtman" wrote in message
...

"habbi" wrote: (clip) Can any motor be slowed with a speed control
(clip)
^^^^^^^^^^^^^^^^
No. Undoubtedly, your fan will be driven by an induction motor. They do
not respond to the usual speed control methods. The easiest way to reduce
the volume of air would be to partially close the open windows. Think of
the windows as valves.



It depends on how the motor syarts but some fan motors are speed
variable by voltage reduction. If the motor has a centrifigul starting
switch then you cannot lower the speed. If however, it does not then
you can try supplying lower voltaand see what happens. The motor may
heat up too much. But you can feel the motor and tell way before any
damage can occur.
ERS