What is the ideal indoor relative humidity percentage for comfort and health?

The ideal indoor relative humidity percentage for comfort and health is between 30% to 50%. Maintaining humidity levels within this range is crucial for several reasons. It helps to provide a comfortable living environment by reducing the likelihood of air feeling too dry, which can irritate the respiratory system and skin. Additionally, this range inhibits the growth of mold, mildew, and dust mites, which thrive in higher humidity conditions, contributing to improved indoor air quality.

When relative humidity is too low, below the recommended levels, it can lead to discomfort, such as dry skin and irritated eyes. On the other hand, if humidity levels rise above 50%, it can create a conducive environment for allergens and pathogens. Therefore, keeping humidity between 30% to 50% is not only optimal for comfort but also plays a key role in maintaining a healthy indoor environment.