Service and repair heating, ventilating, air conditioning and related environmental control systems utilizing knowledge of heating, refrigeration and, pipefitting theory. Class I will work with simple systems and possess a basic understanding of controls and electrical systems. Class II will work with simple refrigerants, circuitry, and air distribution systems. Class III

Service and repair heating, ventilating, air conditioning and related environmental control systems utilizing knowledge of heating, refrigeration and, pipefitting theory. Class III will work with a wide range of refrigerants and complex systems with multiple compressors. Class IV/V will work with compound refrigeration, large built up & reciprocating systems, centrifugal

Service and repair heating, ventilating, air conditioning and related environmental control systems utilizing knowledge of heating, refrigeration and, pipefitting theory. Class III will work with a wider range of DX systems with more advanced controls circuits and multiple compressors. Air cooled DX chiller experience is a plus. Class IV/V will work with compound refriger