Heating and air-conditioning systems control the temperature, humidity, and total air quality in residential, commercial, industrial, and other buildings. Heating, ventilation, air conditioning, and refrigeration technicians install, maintain, and repair such systems. Students will attain a fundamental understanding of basic commercial refrigeration and heating systems including circuit wiring, reading schematics, brazing, and soldering. After demonstrations of refrigeration software, students will build a basic refrigeration system.