The Refrigeration School, Inc. (RSI) offers training in HVAC & Refrigeration, Welding, Electrician, Electro-Mechanical and Mechanical Maintenance Engineering. The institution has been educating individuals to become entry-level heating, ventilation, air conditioning, and refrigeration (HVAC/R) professionals for nearly 50 years. The campus is located at 4210 East Washington Street near the junction of highways 202 and 143 in Phoenix, Arizona.