Heat sources, such as hot water pipes, fixed space heaters, hot water heaters and radiators, exceeding 120°F that are accessible to children, shall be equipped with protective guards or insulation to prevent children from coming in contact with the heat source.
55 Pa. Code § 3800.83
This section cited in 55 Pa. Code § 3800.292 (relating to exceptions for transitional living); and 55 Pa. Code § 3800.302 (relating to exceptions for outdoor and mobile programs).