Abstract: An airflow system adapted for receiving airflow from a refrigeration unit mounted on a front of a lead trailer. The airflow system is also adapted for transferring and receiving airflow from a pup trailer pulled behind the lead trailer. The airflow system uses heated or cooled airflow discharged from the refrigeration unit inside the lead trailer to heat or cool goods at a constant temperature stored inside both of the trailers. The airflow system includes a modified air chute attached to the refrigeration unit and a lead airflow transfer hole in a rear door of the lead trailer. A transfer tube is connected to the transfer hole and to a pup airflow intake hole in the front of the pup trailer for circulating the airflow through the pup trailer. A return tube is connected to a pup airflow return hole in the front of the pup trailer and a lead airflow return hole in the lead trailer's rear door.