Duct cleaning typically refers to the cleaning of the various heating and cooling system components of forced air systems. These include the supply and return air ducts and registers, grilles and diffusers, heat exchangers, heating and cooling coils, condensate drain pans, fan motor and fan housing, and the air handling unit housing.
If these components are not properly installed, maintained, and operated, they may become contaminated with particles of dust, pollen or other debris. If moisture is present, the potential for microbiological growth (like mold) is increased – and spores from this growth can be released into the home’s living space. Some of these contaminants may cause allergic reactions or other symptoms in people that are exposed to them.
In addition to the normal accumulation of dust and dirt found in all homes through regular use, there are several other factors that can increase the need for air duct cleaning:
- Pet hair and dander
- Allergens and irritants
- Microbial growth
- Excessive household dust
- Smoke and cooking odors
- Renovation or construction projects
- Pollen, dust mites and mold