After the fire has been extinguished, smoke damage lingers, becoming the most pressing issue. Standard cleaning methods or masking the fire smell are ineffective, because the problem is chemical in nature. The smell from “smoke damage” is due to an on-going chemical reaction that is releasing very low concentrations. Many of these chemicals by themselves are not offensive until they combine and start reacting, then the smell can linger for months or even years.
The best way to eliminate and remove smoke odors is by using high output ozone generators.
The concentration of Ozone is really important as low concentrations means that the strength of Ozone isn't high enough to kill and remove the smoke smell.