Approved Document J provides guidance on the safe installation and usage of heat producing appliances, including boilers, chimneys and flues, and offers advice on safe fuel storage installations, including solid fuel, liquid oil fuels, and gas-fired heating. 

It outlines safe construction and procedures in the adequate provision of air, the detection of carbon monoxide and suitable warning systems, protection against pollution by managing hazards and sources appropriately, and the control and ventilation of combustion by-products e.g. smoke. 

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