Exceptions: Exhaust air ducts and portions of the air distribution system within appliances or equipment.” “N1103.4 Duct sealing: All ducts shall be sealed in accordance with Section M1601.3.1.” ...

Question: How do you clean the air-conditioning ducts in your car? Deanne Tom: The best way to do it is with a spray product, Deanne. The ducts are a nightmare to take apart. Ray: I’m assumin… ...

Homefix: Dwight Barnett answers home-improvement questions. This week's topics are on water from air-conditioning ducts and dealing with mold spores.