Which condition is most likely to promote mold growth in a home?

Mold growth is predominantly influenced by moisture levels in the environment. Poor air circulation creates stagnant air, which can lead to higher localized moisture levels as humidity is not evenly distributed throughout the space. This stagnation can occur in areas where airflow is restricted, allowing dampness to linger on surfaces.

Additionally, without sufficient air movement, moisture from everyday activities such as cooking, showering, or drying laundry can condense in certain areas, creating an ideal habitat for mold spores to thrive. Therefore, poor air circulation becomes a significant factor in promoting mold growth, especially in conjunction with other conditions such as humidity and moisture.

In contrast, low indoor humidity and excessive ventilation typically work against mold development. Low humidity reduces the amount of moisture available for mold. Excessive ventilation helps to mitigate moisture levels since it increases airflow and ensures that humidity is distributed and managed more effectively. Consistent indoor temperatures can create stable conditions, but without proper airflow, stagnant areas might still develop, leading to moisture issues conducive to mold growth.