A method and system of killing objects wherein said objects are selected from the group consisting of pests, insects, fungus and spores wherein said objects have a starting temperature, TO, and said method and system comprising a first step being application of a means of raising the temperature of said objects by the exposure to heat and water vapor until said objects have reached a temperature TH above said starting temperature, and said method and system comprising a second step being application of a means of lowering the temperature of said objects until said objects have reached a temperature TC below the starting temperature, and said objects being rendered lifeless after experiencing the change in temperatures with respect to time.
