http://penncommercial.edu/programs/trade-technical/hvac-r-training-pennsylvania/: At Penn commercial, we are providing enhanced HVAC training program, that will help our students to make their bright career in trade and technical field. Our heating, ventilation, air conditioning, and refrigeration, or HVAC-R, program provides students with an engaging learning experience designed to keep them on top of the latest technology and prepare them for a successful future as an HVAC-R technician. Penn Commercial provides HVAC classes that are both fun and engaging.