You should consider having the air ducts in your home cleaned if:

There is substantial visible mold growth inside hard surface (e.g., sheet metal) ducts or on other components of your heating and cooling system. There are several important points to understand concerning mold detection in heating and cooling systems.

Ducts are infested with vermin.

Ducts are clogged with excessive amounts of dust and debris and/or particles are actually released into the home from your supply registers.

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