This class includes the installation of plumbing, heating, and air-conditioning systems, including additions, alterations, maintenance and repair.
This class includes: – installation in buildings or other construction projects of heating systems (electric, gas, and oil). furnaces, cooling towers. non-electric solar energy collectors. plumbing and sanitary equipment. ventilation and air-conditioning equipment and ducts. gas fittings. steam piping. fire sprinkler systems. lawn sprinkler systems – ductwork installation