Air Duct Cleaning Process - Direct Contact & Negative Air

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Air Duct Cleaning Process

There are several different procedures to clean air ducts, however Comprehensive Mold Management only uses the proper techniques to ensure it is done correctly and efficiently. We use two different methods depending on the design and layout of the home, these methods include direct contact and negative air. (Both methods are equally efficient.)

These are the steps we use to ensure the air ducts in each home are cleaned properly:

Step 1: Clean the furnace/air conditioner.
  • After testing the system for proper operation, we will disconnect the power before opening the unit for safety.
  • Vacuum the interior surfaces of the Furnace/Air Conditioner.
  • Clean the cooling coils with a HEPA vacuum and a coil cleaner.
  • Clean the Blower unit
Step 2: Clean the supply and return registers and grills.
  • Remove wall, ceiling and Floor registers.
  • Wash Register with cleaner and rinse.
Step 3: Clean the supply and return ducts.
  • Clean all air ducts using powerful duct cleaning equipment.
Direct Contact Method:
This method involves the use of a vacuum with High Efficiency Particulate Air (HEPA) filtration. There is direct contact between the brush head that rotates through the ducts and the interior of duct surfaces to dislodge and remove dirt and debris. 

Negative Air Method:

This method uses compressed air into the duct system through a hose with a special nozzle, while the duct system is under negative air pressure. This nozzle is designed so that the compressed air propels it inside the duct while dislodging dirt and debris. The dislodged dirt and debris become airborne and are drawn down through the duct and out of the system by the high power vacuum equipment. 

Step 4: Install electrostatic air filter and odor control products. (Optional)
  • Decontaminate cleaned ducts with sealant, and Odor Deodorizer
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