view, diagnose and repair a variety of complex equipment within the HVAC-R trade; read building construction plans, blue prints, and equipment instruction manuals; demonstrate sufficient strength, agility and dexterity to perform the work of the position; prepare cost estimates and bid specifications; maintain accurate records; communicate effectively with others encountered in the course of the work; safely use and care for tools and equipment. methods, tools and materials used in the HVAC-R trade and in residential, commercial and industrial building maintenance and repair; preventive maintenance procedures; codes and regulations applicable to the specialty system and building maintenance in general; purchasing and bid requirements; computer systems used in building system diagnosis; occupational hazards and safety precautions associated with HVAC-R.