The level of relative humidity can impact human comfort as well as health.
Relative humidity is state of absolute humidity relative to a maximum humidity for the same temperature.
|
Relative Humidity
|
Category
|
Perception
|
|
< 25%
|
low
|
very dry
|
|
25 to 29%
|
low to moderate
|
dry
|
|
30 to 59%
|
moderate
|
normal, comfortable
|
|
60 to 69%
|
moderate to high
|
moist
|
|
>= 70%
|
high
|
very moist
|
Comfort is also affected by temperature. The heat index is based on both temperature and relative humidity.
Other types of humidity measurements:
(1) absolute humidity
(2) specific humidity
(3) dew point
(4) volumetric humidity
