A realistic depiction of commercial rooftop HVAC units under maintenance, featuring various air conditioning systems like Carrier and other units, with technicians in the background ensuring proper repairs. The rooftop is clean, with urban scenery visible in the distance, emphasizing the importance of professional AC repair and installation in a sunny environment. taken by a DJI FC753 13, moderate DoF, --s 650 --c 25  --ar 16:9