This fire was contained
This may not look like there was a fire that took place, but there was. This was an unusual situation in which the fire came up through the duct. Could have been the furnace. It caused just as much damage as any other fire even though it does not appear to be the case. Almost every room including the basement wreaked with fire smell or contained soot. Fire in general whether it is an all out burn down or minor can cause considerable amounts of damage to the contents inside. Every situation is completely different and yet the same causes are what determines what stays and what does not.