An HVAC Technician IV is primarily responsible for performing installs, repairs and maintenance to a variety of equipment including: refrigeration, air conditioning, electric motors, heating units, heat pumps, hermetic compressors, light commercial furnaces, boilers, burners, intake and exhaust fans, economizers, humidifiers, capacity controls, semi-hermetic compressors, split systems, flame safeguard controls, air compressors, air driers, pneumatic control systems, air cooled/water-cooled chillers, centrifugal chillers self-contained, packaged units, and basic knowledge of control systems. This position also requires work at extreme heights, in areas that are under construction, or in restricted areas such as a switchgear room, manhole, utility tunnel, crawl space, or attic, in confined spaces, and on slippery or uneven surfaces; works on ladders, scaffolds, aerial lifts, catwalks, in ditches and excavations; works in and around single and multi-story buildings with all exposures typical of a heavy construction site, including portable sanitary facilities.