Hello dear ones, I have found that, no matter what temperature and on which strength I set the rear ventilation nozzles in the roof sky, only „cold air comes out! The additional air outlet in the ground reacts differently and provides warm air! Just as with the nozzles in the roof you hardly notice an air flow quite in contrast to the nozzle on the ground, this makes the name nozzle all honor because you notice it and hear it! Is that the same with you? Or maybe something in the D oh not properly connected! Dear greeting Matthias