Can anyone explain to me the difference between the two? Goodman offers them in some of their air handler models: AEPF is a V/S with ECM motor, while the ASPF is multispeed w/ EEM motor. When paired to the SSZ140361A*, the ARI performance is exactly the same: ARI#3068848, and ARI#3068856.
The EMM motor is supposed to be “energy efficient”. In what way, though? Price difference is significant.