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3.20 Combustion appliances – removal of products of combustion - Building standards technical handbook 2022: non-domestic - gov.scot
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3.20 Combustion appliances – removal of products of combustion - Building standards technical handbook 2022: non-domestic - gov.scot
![3.20 Combustion appliances – removal of products of combustion - Building standards technical handbook 2022: non-domestic - gov.scot 3.20 Combustion appliances – removal of products of combustion - Building standards technical handbook 2022: non-domestic - gov.scot](https://www.gov.scot/binaries/content/gallery/publications/advice-guidance/2021/02/building-standards-technical-handbook-2021-non-domestic/chapters/3-environment/3.20.18.jpg)