Asbestos floor tiles can be dangerous for health especially in a closed environment if they are in bad condition. 

In the past, asbestos was widely used as insulating material for boilers. Nowadays it is being replaced by other more safe materials.

Being exposed to asbestos in bad condition can increase chances of getting cancer of the lung tissue or other internal organs.

Asbestos removal needs be done by a professionaly trained workers. Affected areas needs to be sealed to prevent material being released to the air.