Anyone who lives in a colder region knows this moment well: the first truly cold day of fall, when you decide to turn on the heating system for the first time. And along with the warmth comes that characteristic smell of burning dust that spreads through the house. This odor is more than just a minor annoyance. It's the result of months of dust, pollen, pet dander, and other particles that have accumulated in the ducts and on the elements of your heating system during the