How to Prevent Duct Contamination


Whether you want to clean the air ducts in your home or not, it is always wise to maintain some preventive measures to minimize duct contamination. To prevent dirt from entering the system and to ensure long life of your system, it is essential to follow some suggestion that e will be providing in this blog.

Here are some suggestions to prevent dirt from entering the system.


  • Use the best and effective air filter as prescribed by the producer of your heating and cooling system.
  • Change the filters regularly.
  • If the filters are clogged often change them regularly.
  • Make sure any filters are not missed in the system.
  • Make sure that the air cannot bypass the filters through gaps around the filter holder.
  • If you are maintaining or having a regular checkup for your system then make sure to request your service provider to clean cooling coils and drain pans.
  • If you are cleaning your home or if there are any activities that produce dusts and dirt occurring around your home, then make sure to seal off supply and return registers. Do not operate your heating and cooling system until cleaning works are over.
  • Remove the dust from your home regularly and vacuum your home using high efficiency vacuum cleaner.
  • Make sure to maintain the humidifier strictly as recommended by the manufacturer, if your heating system includes in-duct humidification equipment.

Regardless of whether you choose to have the air ducts in your home cleaned, focusing on a decent preventive maintenance program is a key to minimize the duct contamination.


Control the moisture to prevent biological growth in air ducts. Leaks or improper installment and servicing of your system make your duct prone to moisture.

To keep ducts from getting wet and control the moisture around the system, follow the following points:


  • Repair the leaks and water damage as soon as you notice them.
  • Cooling coils are designed to remove the water from the air and which can be the major source of moisture contamination of the system that will lead to mold growth, Pay specific considerations regarding the cooling coils. Also check any insulation near cooling coils for wet spots.
  • Make sure that ducts are properly sealed and insulated in all non-air conditioned spaces like attics and crawl spaces. This prevents moisture that arises due to condensation from entering the system and is also important to make the system work as intended. The heating and cooling system must be properly insulated to prevent water condensation.
  • If you are installing a new air conditioning system or replacing it with a new one, buy the system that is the proper size for your needs and make sure that all ducts are sealed at the joints. A big unit will cycle on and off frequently, resulting in poor moisture removal, especially in the areas with high humidity.

For proper maintenance, checks, repairs and installation of your heating and cooling systems around the area of Boston, remember ACM Service.