No barrier hoses, although I replaced two of the three hoses this summer along with the rear condenser, drier, ft condenser motor and evaporater motor. $1,900 later I got my vent temps down to the mid 30's to low 40's. I'm convinced that the greater the airflow created through the undersized and poorly placed condensers, the better.
And, yea I've got tail! ....with the notched condenser for the rear wiper.