Our commercial AC unit broke in the middle of the summer so I called Dupont heating for help. They send a technician that was able to see that our old ac unit could not be fixed so we needed a brand new one. Dupont sent us a quote for the new unit which we decided to accept after looking at other prices. The technicians came prepared and on time to installed the new unit. They worked very hard to make sure the new AC unit was is up and running by the end of the day as they promised. Mario and the whole Dupont team are professional and reliable. I would recommend this company a 100% they are absolutely amazing people to work with!