Many people associate air quality in the home solely with the right temperature, but humidity is just as important. The ideal humidity level affects our sense of comfort and has an impact on our health, our sleep quality and even the condition of our home. The ideal value is not the same in summer and winter, and the role of the air conditioner in regulating it is much more complex than you might think.
In this article, we'll go through what the ideal humidity is for each season, what problems can be caused by differences, and how a well-adjusted, well-maintained air conditioner can help to create balanced indoor air.
What is the ideal humidity?
According to professional recommendations, the ideal humidity level in the home is between 30-60%. This is the range in which most people feel comfortable, the airways do not dry out, and there is no excessive humidity, which can create a favourable environment for mould. It is important to understand that the time of year, the temperature outside, the frequency of ventilation and the heating or cooling system used all affect the condition of the air in the home.
Ideal humidity in summer - when the air is „heavier”
In summer, the air outside is usually more humid, especially during a rainy season or a heatwave. The air entering the home also contains more humidity, which makes the heat feel worse: the air becomes stuffy and often feels „stifling” even at moderate temperatures.
In summer, the ideal humidity is typically between 40-55%. Higher values can lead to sweatier, more uncomfortable conditions, condensation on colder surfaces and, in the longer term, mould growth.
How does air conditioning help control humidity in summer?
When the air conditioner is running, it not only cools the air, it also removes condensation. This process is completely natural: as the warm, moist air passes through the heat exchanger, excess moisture is precipitated and removed. A well sized and properly adjusted air conditioner thus contributes in summer:
- for a comfortable temperature
- to achieve the ideal humidity
- meaning a significant improvement in comfort
It is important, however, that the equipment must be clean, well maintained and that it should be of the right capacity for the space. Otherwise the dehumidification effect may be uneven.
Ideal humidity in winter - when the air is too dry
In winter, we face a different kind of problem. The cold air outside is already low in moisture, and when this air is heated, the relative humidity drops further. The result is the familiar „dry air” feeling that is a constant in many homes in the heating season.
In winter, the ideal humidity is more likely to be between 30-45%. If lower than this, symptoms may be common:
- scratchy throat, dry cough
- dry eyes and skin
- poorer sleep quality
- more frequent respiratory complaints
What is the role of climate in winter?
Modern air conditioners are excellent for heating, but it is important to know that if the system is not properly controlled, the heating mode can further reduce humidity. This is not to say that air conditioning is not a good solution in winter, it is just that it needs to be set consciously and humidity levels should be monitored.
An expert survey to determine exactly how the air conditioning can be used in the home in a way that supports, rather than detracts from, the ideal indoor air quality.
Why is correct setup and maintenance important?
In both summer and winter, air conditioning can only really help to control humidity if it is in the right condition. A neglected unit loses efficiency and can degrade air quality.
Regular inspection and cleaning will help ensure that:
- dehumidification should work evenly
- do not create air that is too dry
- operate the appliance in an energy efficient way
- indoor air is fresher and healthier
Air quality is not just about humidity
Although ideal humidity is key, it does not in itself determine air quality. A truly healthy living environment is the result of a combination of factors.
For example:
- air cleanliness, i.e. the amount of dust, pollen and other pollutants
- adequate ventilation, which brings fresh oxygen into the home
- uniformity of temperature, with draught-free distribution
When these elements are in harmony, we create a more comfortable and, in the long run, healthier living space.