Why humidity matters

The simple explanation

• ✓Relative humidity describes how close air is to saturation at its current temperature.
• ✓Warm humid air can feel more stressful than equally warm dry air.
• ✓Air conditioning can cool and remove moisture.

Why it works

This advice follows US Department of Energy guidance and the underlying principles of humidity and evaporation.

Important exceptions

Safety, health, weather and the design of your home can change what is appropriate. Stop if an action makes conditions worse.