# The Building (Scotland) Regulations 2004, Paragraph 3.20: Combustion appliances – removal of products of combustion


Every building must be designed and constructed in such a way that the products of combustion are carried safely to the external air without harm to the health of any person through leakage, spillage, or exhaust nor permit the re-entry of dangerous gases from the combustion process of fuels into the building.

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Source: https://www.legislation.gov.uk/ssi/2004/406/schedule/5/paragraph/3.20 (the official version)
Page: https://openlegislation.uk/building-scotland-regulations-2004/schedule-5/paragraph-3.20
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.