Chill the ESCO Air Conditioning Exam 2026 – Cool Your Way to Certification!

The recommended residential indoor relative humidity for summer is typically around 50%. Maintaining indoor relative humidity at this level helps ensure comfort while also mitigating the growth of mold, mildew, and dust mites. A humidity level above 60% can create a more oppressive environment and increase the likelihood of moisture-related issues, while levels below 30% might lead to discomfort due to dry skin, respiratory issues, and static electricity buildup.

In summer, when outdoor temperatures are high, controlling humidity becomes crucial for both comfort and health. A relative humidity of 50% strikes a balance that allows for comfortable living conditions without the adverse effects associated with higher or lower humidity levels.