Humidity
Proper humidity levels (30-50%) are essential for comfort and health. Too low humidity can cause respiratory issues, dry skin, irritated eyes, and cracking or warping of wood furniture and floors. Too high humidity creates a favorable environment for mold, mildew, and dust mites to thrive, which can lead to health issues, particularly for people with asthma or allergies, and damage to furniture, electronics, and even structural components of your home over time.
Optimal
30-50%
Cautionary
51-65%. During warmer months, higher humidity levels (60-65%) are more common and often unavoidable, especially in regions with humid climates. Consider dehumidifiers to reduce discomfort and prevent mold. In colder months, elevated humidity (65% and above) can still be a concern due to condensation and mold risks in poorly ventilated spaces, especially in homes with inadequate insulation. Monitor for mold or mildew.
Hazardous / Out of Range
<30% or >65%. Year-round, consistently high humidity levels (>65%) can lead to mold growth, wood damage, and dust mites, so it’s important to consider using a dehumidifier, improving ventilation, or checking for leaks. In winter, indoor humidity can drop too low (<30%), causing discomfort, dry skin, and respiratory issues.