4322 Plumbing, heat and air-conditioning installation

This class includes the installation of plumbing, heating and air-conditioning systems, including additions, alterations, maintenance and repair. [0]

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
- duct work installation [0]

Also includes

[0]

Does not include

- installation of electric baseboard heating, see 4321 [0]

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