Following is an overview of the four steps required to clean and decontaminate a residential furnace/air conditioner and it's associated duct system:

• The system is tested for proper operation, then the power is disconnected for safety purposes;
• The interior of the furnace/air conditioner is vacuumed;
• The cooling coils are cleaned with a HEPA vacuum and a coil cleaner;
• The blower is cleaned;
• An automist fogger is used to decontaminate the interior surfaces with Sporicidin, an EPA registered biocide.

• The wall, ceiling and floor registers are removed;
• Registers are washed with Dynamite cleaner and rinsed;
• The supply duct openings are blocked;
• The filter is placed in a plastic bag and installed in the return to block the air flow.

• A negative air machine is attached to the system, either at a duct opening or the furnace plenum with an adapter plate;
• A power brush will aggressively remove duct debris or an air powered tool can be used to remove duct debris more gently;
• Ducts will be decontaminated with Sporicidin, Soot Set sealant, and an Odor Kill deodorizer.

• *The bagged filter from the return should be replaced with an electrostatic air filter;
• The plugs are removed and the registers reinstalled;
• *Solid Odor Kill should be placed in he return to control odors for up to 3 months.
• The power to the system will be reconnected and the system tested to verify that everything is working properly.
  
  * = recommended but optional