Humidity calculator for ventilation

This tool is used to calculate and monitor the humidity indoors after ventilation. It often happens that high humidity levels persist in a room despite ventilation, which can lead to an unpleasant indoor climate. Especially in the bedroom, where good humidity in rooms is crucial for healthy sleep, high humidity can lead to problems such as mold growth.

The tool helps to take into account the humidity outside and the temperature differences between indoors and outdoors in order to better assess the effects of air exchange. This is particularly useful if you want to reduce humidity by ventilating, but are not sure whether the outside air is actually contributing to it. The tool can be used to specifically check whether it makes sense to ventilate at this moment in order to avoid high humidity in the rooms.

It also helps you to plan measures to reduce humidity by showing how the humidity in the room could change. This makes it easier to achieve and maintain the optimum humidity for healthy living.

The optimum humidity in rooms is between 40 % and 60 %, depending on the use of the room and individual requirements. This range ensures a healthy and pleasant indoor climate. Humidity that is too low or too high can have a negative impact not only on well-being, but also on health and the fabric of the building. Here is a detailed explanation:

Optimum humidity in living spaces

A relative humidity of 40 % to 60 % is considered ideal for most living spaces such as living rooms, dining rooms or studies. Most people feel comfortable in this range, the air is not too dry and not too humid.

• Below 40 %: If the humidity is too low, mucous membranes and skin dry out, which can lead to irritation of the respiratory tract and an increased risk of infection. In addition, wooden furniture and other materials can become brittle or cracked.
  Above 60 %: Permanently high humidity can promote mold growth, which can endanger health and damage the building fabric. High humidity combined with poor ventilation can promote the formation of condensation on walls and windows, which is a perfect breeding ground for mold.

Humidity in the bedroom

It is particularly important to maintain a good level of humidity in the bedroom. A humidity level of 40 % to 60 % is also ideal here, as it ensures a restful sleep. However, excessive humidity in the bedroom, often caused by breathing or sweating during sleep, can impair the quality of sleep. If the humidity in the bedroom needs to be lowered, it should be aired regularly and a dehumidifier used if necessary.

High humidity can occur despite ventilation if the outside air is also very humid. In such cases, the use of technical aids such as dehumidifiers is particularly useful to reduce the humidity to a comfortable level.

Humidity in the bathroom and kitchen

In damp rooms such as the kitchen and bathroom, humidity can quickly rise above 60% due to cooking fumes or water vapor from showers. Regular ventilation or the use of an exhaust air system is crucial here to reduce the humidity. Short-term high humidity is normal in these rooms, but the values should not rise above 70 % in the long term in order to prevent mold growth.

Humidity in winter

During the cold season, the relative humidity indoors can drop quickly, especially if heating is used. The dry heating air often leads to humidity levels below 40%, which irritates the airways and leads to dry skin. It is therefore important to ensure sufficient humidity in winter, for example by using humidifiers or hanging damp cloths over the heating.

Humidity in summer

In summer, the humidity outside can often be very high, which makes ventilation more difficult. If the humidity outside is high, you should be careful not to air the room for too long so as not to let too much moisture into the room. In very hot and humid weather, it can be useful to use a dehumidifier or air conditioning to control the humidity in the room.

Airing in the rain: Does it make sense?

The humidity calculator can also help you decide whether you should ventilate in the rain by comparing the humidity outside with the temperature difference and calculating the expected humidity in the room after ventilation. It is often assumed that ventilation in the rain increases the humidity in the room, but this is not always the case. If the outside air is cooler despite the rain, it may contain less absolute humidity and therefore help to reduce the high humidity in the room. The calculator offers a simple way of checking this and determining whether ventilation is also useful when it is raining.

Influence on health

A humidity level of 40 % to 60 % helps to keep the respiratory tract healthy. Air that is too dry encourages colds and respiratory infections, while an environment that is too humid promotes the growth of mold and dust mites, which in turn can aggravate allergies and asthma.

Conclusion: good humidity in rooms

The optimum humidity in rooms is between 40 % and 60 %, which is ideal for both well-being and health. Values that are too low cause dry air, while values that are too high can promote mold growth.To ensure good humidity levels in rooms, it is important to regularly check and adjust the humidity by ventilating, using humidifiers or dehumidifiers.