This class includes the installation, repair and maintenance of plumbing, heating and air-conditioning systems, including additions and alterations. This class includes: - installation, maintenance and repair of: • heating systems (e.g. heat pumps, solar thermal collectors) • furnaces, cooling towers • plumbing and sanitary equipment • ventilation and air-conditioning equipment and ducts • gas fittings • steam piping • sprinkler systems (e.g. fire and lawn sprinkler systems) - construction or installation of masonry heater stoves - ductwork installation
This class also includes: - installation of medical gas distribution systems in hospitals
This class excludes: - installation of electric baseboard heating, see 43.21 - camera inspections in air ducts, water and gas pipes, and other liquids without repair or installation, see 71.20