What is the recommended relative humidity range for homes?

What is the recommended relative humidity range for homes?

• A. 30-50%
• B. 60-70%
• C. 10-20%
• D. 70-90%

Answer: (A)

Keeping indoor humidity in a moderate range helps balance comfort, air quality, and building health. Around 30-50% humidity prevents excessive dryness while avoiding conditions that promote mold, condensation, and moisture-related damage. Higher levels (60-70% or more) can lead to condensation, mold growth, and musty odors, while very low levels (10-20%) can dry out skin and mucous membranes and cause static. So the recommended range is 30-50%.

Keeping indoor humidity in a moderate range helps balance comfort, air quality, and building health. Around 30-50% humidity prevents excessive dryness while avoiding conditions that promote mold, condensation, and moisture-related damage. Higher levels (60-70% or more) can lead to condensation, mold growth, and musty odors, while very low levels (10-20%) can dry out skin and mucous membranes and cause static. So the recommended range is 30-50%.