WE ARE A FOSTER AND ADOPTIVE FAMILY AND NEEDED MORE SPACE FOR OUR FOSTER CHILDREN. WE PURCHASED A NEW NISSAN NV 3500 SL ON MARCH 31,2018. WE ASKED THE DEALER ABOUT INSTALLING THE DVD PLAYERS AND IF IT VOIDED THE NISSAN WARRANTY. AFTER BEING TOLD THE WARRANTY IS STILL VERY MUCH VALID IF THEY INSTALL THE AFTERMARKET ITEM WE AGREED. WE HAD DUAL DVD PLAYERS AND A REMOTE START INSTALLED. IN JUNEAU THE TEMPERATURE ROSE WE NOTICED IT TOOK A WHILE TO GET COOL. MY KIDS STARTED COMPLAINING ABOUT THE TEMPERATURE IN ROWS 3 AND 4. WE NOTICED LITTLE TO NO AIR FLOW IN THE REAR. I SEARCHED THE INTERNET TO MAKE SURE I HAD THE DIALS CORRECT. READ THE MANUAL AND IT WAS STILL HOT. MY 4YR OLD WAS DRIPPING WITH SWEAT AND HER FACE WAS RED FROM BEING I. THE FOURTH ROW. I PLACED A THERMOMETER IN THE REAR AND THE TEMPERATURE WAS 105. FRONT TEMPERATURE WAS 63. NO MATTER WHAT WE DO THE REAR AIR CONDITIONING DOES NOT SEND ENOUGH AIR TO COOL THE VAN. I PLACED THE VAN IN THE SHOP TO HAVE IT REPAIRED. I WAS TOLD THE COMPANY THAT INSTALLED THE DVD PLAYER HAD FIXED IT AND IT WAS 100% BETTER. AFTER BEING IN THE CAR I NOTICED THE SAME AMOUNT OF HEAT IN THE BACK. I CALLED TO INFORM THE DEALERS SERVICE DEPARTMENT AGAIN AND WAS TOLD TO BRING IT IN. AGAIN THE DVD COMPANY WAS TO BE CALLED TO CHE K. I WAS TOLD TO COME PICK UP THE VAN. SERVICE DEPARTMENT TOLD ME THAT THE VAN HAS A BAD AIRFLOW DESIGN AND NITHING CAN BE DONE. I ASKED IF HE GOT IN THE VAN AND HE EXPLAINED HE DID AND IT'S REALLY HOT. ALSO WAS TOLD THE