If you work outside the home while your spouse works at home, you probably enjoy walking into the home in the evenings after work and smelling a pot roast or baked chicken cooking in the oven. “Honey it is hot in here,” you might say while you turn on the air conditioning system. Within minutes, however, you may smell something else besides what is baking in the oven. This could be as a result of pollen, dust mites, mold and dirt in your air ducts.