Recommended Relative Humidity

Recommended relative humidity level. Relative humidity above 70% may cause condensation on cold surfaces, while below 25% feels uncomfortable dry. Human comfort requires relative humidity between 25-60% RH.

ConditionRelative Humidity RangeNotes
Human Comfort25% - 60% RHOptimal range for human comfort
Uncomfortable DryBelow 25% RHStatic electricity, paint cracking, wood shrinkage
Uncomfortable WetAbove 60% RHMoisture sensation increases
Condensation RiskAbove 70% RHMold, corrosion, and moisture deterioration on cold surfaces
Special ConditionsBelow 70% RHLower thresholds may apply in specific environments