What is the recommended indoor humidity level for homes?
According to ASHREA (American Society of Heating, Refrigeration & Air-Conditioning Engineers) a good range is between 30% and 60% relative humidity. A wider range, from a low 25% to a high of 80%, can be acceptable for thermal comfort (your comfort level). It would depend on the type of clothing worn and your level of physical activity.
A good range is between 30% and 60% relative humidity. You can determine humidity levels with a relative humidity sensor typically referred to as a hygrometer or psychrometer. This level of humidity minimizes the indoor growth of allergenic or pathogenic organisms such as dust mites and molds.1 A wider range of humidity levels, from a low of 25% to a high of about 80%, can be acceptable in terms of thermal comfort (your comfort level) depending on the type of clothing worn and the level of physical activity.
