Offered in three formats: in-person, hybrid, or 100% online NTI’s HVAC industry training programs work with you to prepare for a new career. Scroll down to learn more about our two programs and their course delivery options! Our HVAC technician program is totally flexible to fit your schedule: we offer 3 and 4-month programs with morning, afternoon, and evening class schedule options. Moreover, NTI offers a totally unique Fusion Training Program that allows students to learn online, and apply their skills one day a week in our HVAC labs. Contact admissions now to learn more. Take advantage of National Technical Institute’s unique “Immersion” training Entry Level HVAC Technician Program offered mostly online. Total program hours: 100.