Which of the following is NOT commonly considered a source of VOCs?

Volatile Organic Compounds (VOCs) are chemicals that readily evaporate at room temperature and are commonly found in various household products. Varnishes, coatings, and cleaning chemicals are all known sources of VOCs. Varnishes and coatings, such as paints and sealants, often contain solvents that emit VOCs as they dry. Similarly, many cleaning products include VOCs to enhance their effectiveness or fragrance.

In contrast, drywall isn’t typically recognized as a significant source of VOCs. While some drywall may contain trace amounts of chemicals, it generally does not release VOCs in the same manner or to the same extent as the other listed products. Thus, while drywall can contribute to other types of indoor air quality issues, it does not commonly serve as a source of VOCs like varnishes, coatings, and cleaning chemicals do.