Where should moisture-generating appliances, such as dryers, be vented to prevent mold growth?

Moisture-generating appliances, such as dryers, should be vented outdoors to effectively prevent mold growth. When these appliances operate, they produce a significant amount of moisture and humid air. If this moisture-rich air is vented indoors, it can raise the humidity levels within the home, creating a favorable environment for mold spores to flourish. High humidity levels, particularly above 60%, can accelerate mold growth on various surfaces, including walls, insulation, and furniture.

By venting appliances outdoors, the excess moisture is removed from the living space, helping to maintain appropriate humidity levels that discourage mold proliferation. This practice is essential in preserving indoor air quality and protecting the structural integrity of the home, as well as the health of its occupants. In contrast, venting into attics or garages does not effectively remove moisture from the home and may create conditions conducive to mold development.