ACR 0640C - Introduction to HVAC Level 1 ACR 0640C - Introduction to HVAC Level 1 s prepare the student for Level I certification in the National Center for Construction Education and Research (NCCER) certification program. Content includes an introduction to HVAC, trade mathematics, copper, and plastic piping practices, soldering and brazing, and ferrous metal piping practices. Semester Hours: 150 clock hours Semester all Fees: Lab Fee Course Designations: Post-Secondary Adult Vocational