Humidity For Human Comfort

Humidity is a factor in thermal comfort.

Humidity for human comfort. For some individuals low relative humidity rh may. Meaning high or low relative humidity can be uncomfortable. Comfort humidity ranges were 7 9 15 1 g kg 3 3 18 8 g kg and 2 9 12 8 g kg humidity ratio in spring summer and winter respectively.

A heat index chart factors relative humidity into temperature to provide a more accurate assessment of what the temperature feels if you look at the chart below it shows you will feel at specific temp and relative humidity prefered human comfort conditions are 7. Very high levels of humidity contribute to the growth of mold funguses dust mites and other pests. Ideally between 30 and 50.

The ideal is somewhere around 45 55. According to the environmental protection agency indoor relative humidity should be kept below 60. Indoor humidity between 30 70 rh is essential in spaces that human beings occupy as it allows them to function optimally.

That condition of mind which expresses satisfaction with the thermal environment. Relative humidity above 60 feels uncomfortable wet. But at a humidity up to 65 and that same 95 feels like a whopping 117.

Overall our results indicate that different comfort humidity limits should be considered for different seasons in the hot summer cold winter zones of china. Human comfort requires the relative humidity to be in the range 25 60 rh. According to the american society of heating refrigerating and air conditioning engineers ashrae the ideal humidity range for humans is between 30 to 60 percent relative humidity.

At lower relative humidity rh less than 30 occupants might experience eye irritation or a stuffy nose. At higher relative humidity rh levels more than 60 can encourage the growth of mold and mildew. Human thermal comfort thermal comfort is defined in british standard bs en iso 7730 1 as.