"bill a" wrote in message
. com...
here's an article that seems to imply that 3ph motors are inherently more
efficient
and that 3ph compressors do run more cheaply
http://eisg.sdsu.edu/shortsums/..%5C...ms%5C99-39.htm

bill


This is Turtle.

The 3 phase compressor may run very cheaply but the compressor is what that is
rated here and the system as a whole is not rated. Cost to operate is rated in
seer and not in the out put of A compressor but the system as a whole.

The highest seer rating of any 3 phase system know to man today is a 10 seer
rating and single phase systems have rating of 16 seer + .

No matter how you look at it 3 phase is a electric hog made to even run on low
voltage where a single phase will not run on low voltage!

TURTLE