Without ventilation it is possible that carbon dioxide, water vapour, organic impurities, smoking, fumes and gases could reduce the air quality by humidity, dust and odours and also reduce the percentage of oxygen in the air to make the building less comfortable to work or live in. Ventilation of a building is required to maintain air quality and so contribute to the health and comfort of the occupants. 3.1 Site preparation – harmful and dangerous substancesģ.2 Site preparation – protection from radon gasģ.8 Private wastewater treatment systems – treatment plantsģ.9 Private wastewater treatment systems – infiltration systemsģ.17 Combustion appliances – safe operationģ.18 Combustion appliances – protection from combustion productsģ.19 Combustion appliances – relationship to combustible materialsģ.20 Combustion appliances – removal of products of combustionģ.21 Combustion appliances – air for combustionģ.22 Combustion appliances – air for coolingĪppendix B.
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