What step in the smoke odor control program employs thermal fogging?

The step in the smoke odor control program that employs thermal fogging is the third step. This step focuses on addressing and eliminating persistent smoke odors that may remain after initial cleaning efforts. Thermal fogging is a technique that uses heat to vaporize deodorizing agents, allowing them to penetrate porous materials and surfaces where smoke particles have settled.

This method is particularly effective because it mimics the behavior of smoke. The fog particles can reach areas that traditional cleaning methods might not, effectively neutralizing odors by binding with the odor-causing particles and rendering them inoperative.

In contrast, earlier steps in the smoke odor control program typically involve physical cleaning and removal of obvious soot and smoke residues, while the final steps often include deodorization methods that do not involve fogging. Therefore, the third step is where the application of thermal fogging is most appropriate in a comprehensive smoke odor control strategy.