Carbon monoxide and other combustion by-products are
produced when fuels do not burn completely. All fuel-burning
appliances need air for the fuel to burn efficiently. When a
generous supply of fresh air is available and the fuel is
burning properly there is little danger of poisoning. But
when there is inadequate ventilation or the appliance is not
operating properly carbon monoxide is produced and can
gradually overcome and even kill an unsuspecting bystander. ...
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