Smoke damage and odor are difficult to eliminate from homes. Whether from heavy indoor cigarette smoke or smoke damage from a house fire, smoke lingers in the home long after the flame is extinguished. Smoke will adhere to walls and surface material easily in the form of tar and sometimes a yellowish resin. Removing the accompanying odor can take some time depending on how heavy the damage is. However, erasing a lingering smoke odor that has circulated through the home via air vents can be accomplished without consulting a professional fire restoration service.
Locate all vent covers. Take the covers off of all vents inside the home.
Soak the vent covers in a solution of warm water and bleach overnight. This will rid the covers of any sticky smoke residue.
Spray Nok-Out or any other reputable smoke odor remover into vents generously, or soak a rag with the remover, and wipe the interior of the vents. Spray Nok-Out directly onto filters, as well.
Turn the air conditioner or heater fan on to circulate the air, and let it run for 24 hours. The smoke odor should be removed after 24 to 36 hours.