# The Oil Heaters (Safety) Regulations 1977, Regulation 18: Flame creep


An oil heater shall be so constructed that, if it is filled, lit and adjusted as specified in Appendix C to the British Standard Specification of 1974, its flame will not increase in size at any time during the four hours following its final adjustment as specified in that Appendix.

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Source: https://www.legislation.gov.uk/uksi/1977/167/regulation/18 (the official version)
Page: https://openlegislation.uk/oil-heaters-safety-regulations-1977/regulation-18
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.