Air Quality Awareness Week- Day Two (Smoke Damaged Ducts) A fire damage, no matter big or small, can spread smoke into every room of your home. Even after the fire has been put out, there are still concerns. Smoke particles can get into your air ducts and HVAC system which, if it goes uncared for, can cause lung irritation and other heath problems. Smoke damage is only of the sneakiest effects of a house fire. Smoke can travel all throughout your home.