55 Pa. Code § 2380.54
Heat sources, such as hot water pipes, fixed space heaters, hot water heaters, radiators, wood and coal burning stoves and fireplaces, exceeding 120°F that are accessible to an individual, shall be equipped with protective guards or insulation to prevent an individual from coming in contact with the heat source.
The provisions of this § 2380.54 adopted January 15, 1993, effective January 16, 1993, 23 Pa.B. 343.