How dry is the air humidity?

The relative humidity is less than 30%.

The most comfortable indoor temperature and humidity is: (people who feel comfortable in this range account for more than 95%, the upper limit of relative humidity should not exceed 80%, and the lower limit should not be less than 30%)

1, winter temperature 20-25℃, relative humidity 30%-80%;

2. In summer, the temperature is 23 to 30℃ and the relative humidity is 30% to 60%.

In an air-conditioned room, people will feel most comfortable when the room temperature is 20-25℃ and the humidity is 40-50%.

4. Room temperature with high working efficiency: 20℃ and relative humidity of 40% ~ 60%. At this time, people's mental state is very good and their thinking is the most agile.

When the extended data air gradually dries (the relative humidity percentage decreases), static electricity will be generated.

The drier the air is, the easier it is to generate static electricity, and the relative humidity (RH) has a direct impact on the performance of surface charge accumulation. The higher the relative humidity, the shorter the time for an object to store charge, and the way to reduce the surface charge (because the relative humidity increases) can be through recombination or conduction. When the relative humidity increases, the electrical conductivity of air also increases.

When the air gradually dries (the percentage of relative humidity decreases), the change of electrostatic capacity is definite and obvious. When the relative humidity is 10% (very dry air), when walking on the carpet, it can generate 35kV charge, but when the relative humidity is 55%, it will drop sharply to 7.5kV.

The optimum range of relative humidity in working environment is 25%-50%. Some clean places generally require 50% relative humidity, while other environments require lower relative humidity because the equipment is sensitive to corrosion and humidity.

Relative humidity is more commonly used in weather forecast. Reflects the possibility of rain and fog. In hot weather, high relative humidity will make people (and other animals) feel hotter because it hinders the evaporation of sweat. Humans can therefore calculate the heat index.

Baidu encyclopedia-relative humidity