Every CNA program in CT must be a minimum of 100 hours in length. Some programs are longer. The 100 hours can be done on a full-time basis or spread out of several months. Attendance is critical to successfully completing a CNA program, so consider the class schedule before you enroll. There are many schedule options available at Northeast Medical Institute. Our program is 2 weeks and 2 days long and we offer classes in both in New Haven and Stamford.