What is the primary reason to control moisture in indoor environments?

• A. To prevent mold growth that degrades IAQ
• B. To eliminate all humidity completely
• C. To increase humidity as much as possible
• D. To only manage temperature

Answer: (A)

Controlling moisture matters because excess moisture creates an environment where mold and other microbes can grow, which degrades indoor air quality by releasing spores and irritants that can trigger allergies and respiratory issues. Keeping humidity in a moderate range—neither too dry nor too damp—helps suppress mold growth and protects building materials, comfort, and overall IAQ. Simply eliminating all moisture isn’t practical or desirable, and increasing humidity would actually worsen mold risk. Moisture management isn’t limited to temperature alone; it involves ventilation, drainage, and source control to maintain appropriate humidity levels.