This HVAC/R class offers experience with residential split systems, packaged heat pump systems, air conditioners, gas furnaces, and evaporative coolers. The Refrigeration School students are tasked with building schematics for air conditioning/heating systems and wiring the same systems having only the components of the system as reference. A further study of mechanical and electrical troubleshooting turns more hands-on in this class as students see the equipment come to life by their own hand. Gas piping, sizing, and installation are studied as it applies to furnace operation.