We were hoping to put in a more efficient fan motor in the furnace, but it didn't look right. The existing 1/3 HP motor is much smaller than the 3/4 HP Emerson he was given. The book shows a 12% savings if he goes back and gets the same 1/3 HP BPM (brushless permanent magnet motohttp://en.wikipedia.org/wiki/Brushless_AC_electric_motorr).
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