The Season of High Humidity: How to Protect Your Home?

07/ 10/ 2026

Listen to online Stop   It’s the height of fall outside, which means that along with the rain and changeable weather, the microclimate in our homes is also changing. Windows tend to stay closed more often, and regular ventilation is kept to a minimum to prevent heat loss. Over time, this can become a problem: condensation forms on the windows, and dark mold spots appear in the corners of rooms and on window sills. Indoor humidity isn’t unusual in and of itself. It results from everyday activities: breathing, cooking, showering, or drying laundry. The problem arises when this moisture isn’t properly removed from the space. That’s why the issue of energy-efficient and high-quality ventilation becomes particularly relevant in the fall. If the ventilation in a room isn’t working effectively enough, excess moisture remains indoors and begins to settle on surfaces. It’s recommended to keep the relative humidity in the home below 60%, and a range of 30–50% is considered the optimal guideline. One sign of high humidity indoors can be the appearance of condensation.  But why does this happen?  It all comes down to the temperature difference between the outdoor and indoor environments. In the fall, it’s already quite cool outside, but warm indoors. So when the heated indoor air comes into contact with the cold surface of the glass, water vapor begins to condense on it in the form of droplets. But why, then, do some windows fog up while others, for example, don’t? Here’s the thing: the higher the humidity inside the room, the greater the risk of condensation. If this situation occurs regularly, it’s not just the surfaces that remain damp—it also creates favorable conditions for the growth of mold and mildew. People often try to simply cover up black spots in the corners, near windows, or behind furniture with a mold remover or wipe them away with a rag… However, if the source of excess moisture remains, the problem may return. Therefore, it’s important to address the cause first, rather than just the symptoms. Mold should not be ignored, especially because of its extremely negative impact on health. Spending time in a room with this problem can irritate the respiratory tract, trigger coughing, a runny nose, nasal congestion, and irritation of the eyes and skin. According to the World Health Organization, prolonged exposure to moldy indoor environments is associated with an increased risk of exacerbations of respiratory symptoms, allergies, and asthma. So how can you solve the problem of high humidity? You need to ensure effective ventilation to properly remove excess moisture from the room. Leaving a window open in the fall is definitely not the best way to ventilate. That’s why there’s a modern and energy-efficient alternative.  The PRANA heat recovery ventilator is a modern and energy-efficient ventilation system that simultaneously removes stale air and supplies fresh air, ensuring a complete air exchange cycle. In this way, the unit removes excess moisture from the room and prevents it from condensing on cold surfaces. And thanks to its patented copper heat exchanger technology, the system retains up to 98% of the room’s coolness or warmth. In addition, the PRANA Eco Energy and Eco Life models are equipped with a special built-in humidity sensor. It monitors the humidity level in the room and responds promptly to any increase. This is especially important in the fall. And thanks to its automatic modes, the system can independently adjust ventilation intensity based on microclimate conditions. If humidity levels suddenly rise, the heat recovery unit increases airflow, helping to remove excess moisture from the room more quickly. When conditions return to normal, ventilation intensity is reduced accordingly. Fall is the perfect time to take care of the indoor climate in your home, before excessive humidity turns into condensation and mold. Ensure proper ventilation in advance so that during the cold season, you can maintain not only warmth but also comfort and a healthy atmosphere in your home. Read more on the manufacturer’s official website: prana.ua

It’s the height of fall outside, which means that along with the rain and changeable weather, the microclimate in our homes is also changing. Windows tend to stay closed more often, and regular ventilation is kept to a minimum to prevent heat loss. Over time, this can become a problem: condensation forms on the windows, and dark mold spots appear in the corners of rooms and on window sills.

Indoor humidity isn’t unusual in and of itself. It results from everyday activities: breathing, cooking, showering, or drying laundry. The problem arises when this moisture isn’t properly removed from the space. That’s why the issue of energy-efficient and high-quality ventilation becomes particularly relevant in the fall.

If the ventilation in a room isn’t working effectively enough, excess moisture remains indoors and begins to settle on surfaces. It’s recommended to keep the relative humidity in the home below 60%, and a range of 30–50% is considered the optimal guideline.

One sign of high humidity indoors can be the appearance of condensation.  But why does this happen?  It all comes down to the temperature difference between the outdoor and indoor environments. In the fall, it’s already quite cool outside, but warm indoors. So when the heated indoor air comes into contact with the cold surface of the glass, water vapor begins to condense on it in the form of droplets.

But why, then, do some windows fog up while others, for example, don’t? Here’s the thing: the higher the humidity inside the room, the greater the risk of condensation.

If this situation occurs regularly, it’s not just the surfaces that remain damp—it also creates favorable conditions for the growth of mold and mildew.

People often try to simply cover up black spots in the corners, near windows, or behind furniture with a mold remover or wipe them away with a rag… However, if the source of excess moisture remains, the problem may return. Therefore, it’s important to address the cause first, rather than just the symptoms.

Mold should not be ignored, especially because of its extremely negative impact on health. Spending time in a room with this problem can irritate the respiratory tract, trigger coughing, a runny nose, nasal congestion, and irritation of the eyes and skin. According to the World Health Organization, prolonged exposure to moldy indoor environments is associated with an increased risk of exacerbations of respiratory symptoms, allergies, and asthma.

So how can you solve the problem of high humidity?

You need to ensure effective ventilation to properly remove excess moisture from the room. Leaving a window open in the fall is definitely not the best way to ventilate. That’s why there’s a modern and energy-efficient alternative.

 The PRANA heat recovery ventilator is a modern and energy-efficient ventilation system that simultaneously removes stale air and supplies fresh air, ensuring a complete air exchange cycle. In this way, the unit removes excess moisture from the room and prevents it from condensing on cold surfaces. And thanks to its patented copper heat exchanger technology, the system retains up to 98% of the room’s coolness or warmth.

In addition, the PRANA Eco Energy and Eco Life models are equipped with a special built-in humidity sensor. It monitors the humidity level in the room and responds promptly to any increase. This is especially important in the fall. And thanks to its automatic modes, the system can independently adjust ventilation intensity based on microclimate conditions. If humidity levels suddenly rise, the heat recovery unit increases airflow, helping to remove excess moisture from the room more quickly. When conditions return to normal, ventilation intensity is reduced accordingly.

Fall is the perfect time to take care of the indoor climate in your home, before excessive humidity turns into condensation and mold. Ensure proper ventilation in advance so that during the cold season, you can maintain not only warmth but also comfort and a healthy atmosphere in your home.

Read more on the manufacturer’s official website: prana.ua