Wiring different DC voltages to use 120V AC
You shouldn't connect the motors in series, because the current each motor will require will depend on its mechanical load much more than on its rated current.

Likewise, the fans shouldn't be connected in series.  So you need 12 volts at 5.5 amps for the motors and fans.  

I assume the "thermoelectric plates" are resistive heaters - if so, they should work on 12 volts, but won't get quite as hot.  It appears that they need 9 amps each at 15.4 volts.