This class is offered in the Hyflex format, meaning the work can be accomplished online with the opportunity to attend weekly classes either In-person or via Zoom. HVAC Apprentice Year 2: Course A; This is one of four 8-week courses that comprise the Year 2 HVAC Apprentice training. Year 2 of the HVAC Apprentice training covers appliance Installation, 24 hours, intro to Blueprints & Specifications, 24 hours, Basic Electricity, 60 hours, Indoor Air Quality, 15 hours, and Residential Load Calculations, 33 hours.