Exercising window covering management is key to keeping your Travato cool. Run the cab engine and A/C along with the rooftop unit if you are starting with a hot van. Put in the windshield and cab door covers. Close all window shades – especially on the side where the sun is shining. Open the awning far enough to shade the windows. In a K, close off the bathroom area and install curtains behind the cab seats to reduce the cooling footprint. AND – remember that the unit is only designed to have the inside temperature 20 degrees cooler than the outside temperature. Use 12v or USB fans to increase air movement.