What Normal Humidity Should be in the House?

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With humidity of 100%, there is so much steam that air cannot hold water and it can rain. Scientists argue that the normal humidity in the house is a limit of 40-60%.

The relationship between relative humidity and health can take the most unexpected forms. Many scientists claim that people can tolerate stress more easily if the humidity level is about 45%. When humidity rises or falls, the reaction to stress becomes more acute.

humidity in the house

The humidity level is influenced by factors:

  • Season. In summer, humidity is generally higher (warmer air can hold more water vapor), in winter – lower.
  • Place of residence Relative humidity is higher near water bodies than in drier areas. In the tropics – higher than in the northern latitudes.
  • Climatic conditions indoors. Heating appliances inside closed apartments “dry” the room. Heated air can hold more moisture, but the amount of water vapor in the room does not increase, so the relative humidity drops. Humidifiers increase the amount of water vapor in the air – and relative humidity rises.

The danger of high humidity in the house?

  • The risk of allergic reactions increases. Allergic dust mites and fungi begin to multiply when air humidity exceeds 75%. Symptoms of allergies are diverse. An obsessive cough, rhinitis, and skin irritation may appear.
  • The risk of poisoning by toxic fumes is increased. The higher the humidity, the more active the toxic formaldehyde gas is released from the internal building materials (plywood, wood fiberboards, laminate, some insulation materials). The body can respond to an increased concentration of this substance by burning in the eyes, coughing, nausea, and the appearance of irritated areas on the skin.
  • The risk of getting heatstroke increases. It is especially important for those involved in sports or other physical activities. Sweat is part of the thermoregulation system. A person sweats to lower the temperature of a body warmed by heat or activity. If the air around is saturated with water vapor, sweat will not be able to evaporate effectively. This may cause overheating.
Air Dryer

What to do if the air humidity in the house is increased?

Use a dehumidifier. This is a device that draws excess moisture from the air. Such devices are often installed in basements to save them from moisture.
Ventilate and ventilate more often. This is a cheap and effective way to reduce excess moisture.

What is the danger of low humidity in the house?

  • The mucous membranes of the eyes and nose dry out. Dryness in the nasopharynx can lead to a decrease in immunity and increases the risk of catching a respiratory infection. Dry eyes can cause dry eye syndrome. We also suggest reading our article on Eyesight Deteriorated.
  • The risk of getting ARVI is increasing. It has been studied and proved that the concentration of infectious bacteria and viruses transmitted through the air drops to a minimum at a relative humidity of 40% to 70%. Dry air makes viruses and bacteria more active, that is, simplifies their transmission.
  • The skin becomes dehydrated. Dryness is manifested by scaly areas on the open parts of the body (hands, cheeks, nose), irritations.
  • The condition worsens with colds, allergies, asthma. Drying of the mucous membranes leads to a sore throat. Coughing at low humidity becomes more active and tiring.

What if the humidity is too low in the house?

Buy a household humidifier. This device saturates the surrounding air with water vapor and helps to quickly increase the relative humidity in the room.

You can arrange “moisturizing” indoor plants (for example, hibiscus, ficus, dracaena)


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