What is CO2 and importance of ventilation

Table of Contents

• 1. What is CO2? An introduction to carbon dioxide and its importance.
• 2. CO2 concentration – How carbon dioxide appears indoors?
• 3. Indoor air quality and CO2: What does the Department Food & Rural Affairs? ( UK Air, Air Information Resource) say?
• 4. Ventilation strategies: How to effectively reduce CO2 concentrations?
• Ventilation in living spaces

This article offers tips and tricks to get the most out of your ventilation habits.

1. What is CO2? An introduction to carbon dioxide and its importance.

CO2, also known as carbon dioxide, is a colourless and odourless gas found in the Earth’s atmosphere. It is one of the most important greenhouse gases and plays a crucial role in the global climate system. Carbon dioxide is produced by a variety of processes, including the burning of coal and other fossil fuels, as well as natural processes such as respiration and decomposition.

The significance of CO2 is complex. It is not only an indicator of indoor air quality, but also an important factor in global climate change. An increased concentration of CO2 in indoor air can lead to a number of health problems, including fatigue, poor concentration and headaches. It is therefore important to monitor CO2 levels in rooms and to ventilate when necessary.

The CO2 concentration is usually measured in parts per million (ppm). The CO2 content in outdoor air is around 400 ppm, while it can be significantly higher indoors, especially in poorly ventilated rooms. A CO2 level of over 1,000 ppm is considered a health risk and should be reduced by ventilation measures.

When does it become dangerous? At levels above 2,000 ppm, health problems such as tiredness, poor concentration and even shortness of breath can occur. It is therefore important to ventilate regularly to reduce the CO2 concentration.

There are various methods for measuring the CO2 concentration in indoor air, from simple CO sensors to complex ventilation systems. These devices can be used in schools, offices and other indoor spaces to monitor and, if necessary, improve indoor air quality.

During the pandemic, monitoring CO2 levels indoors has taken on added importance. A high CO2 level can be an indication of an increased risk of infection with viruses such as SARS-CoV-2, as it indicates inadequate ventilation and a high proportion of recycled air.

Overall, CO2 is an important indicator of indoor air quality and has a far-reaching impact on people’s health and the state of our planet. It is therefore important to address this gas and its impact on both personal health and the environment.

Avoiding high CO2 concentrations is not only important for the well-being of people, but also for the environment. CO2 is a greenhouse gas and contributes to the greenhouse effect. Regular ventilation and the use of ventilation technology can reduce the CO2 content and thus contribute to climate protection.

2. CO2 concentration – How carbon dioxide appears indoors?

Carbon dioxide (CO2) is produced in rooms mainly through human activity. Breathing, talking and even cooking can increase the CO2 content in indoor air. In offices and schools, where many people work or study in confined spaces, the CO2 concentration can rise particularly quickly.

An increased CO2 content indoors is not only a health risk, but also an indicator of poor indoor air quality. Regular ventilation is therefore important. It helps to reduce the concentration of carbon dioxide and improves the overall air quality.

3. Indoor air quality and CO2: What does the Department Food & Rural Affairs? ( UK Air, Air Information Resource) say?

The DeFRA makes clear recommendations on indoor air quality, particularly with regard to CO2 levels. According to the authority, CO2 concentrations of 1,000 ppm (parts per million) should not be exceeded in rooms. If levels exceed 2,000 ppm, urgent action is required.

Air quality Expert Group – “Indoor air quality” ph. 1.7.1, ph. 3.2.1

These limits are particularly important for schools and offices, where indoor air quality is often poor. High CO2 levels can lead to tiredness, poor concentration and even health problems. Regular ventilation, possibly supported by ventilation technology, is therefore essential.

4. Ventilation strategies: How to effectively reduce CO2 concentrations?

An effective ventilation strategy is essential to reduce the CO2 concentration in rooms. Various factors play a role here, from the type of ventilation to technical solutions such as CO sensors.

Use of CO2 sensors
CO2 sensors can be used as an indicator of indoor air quality. They measure the CO2 content and output a value in parts per million (ppm). Limit values such as 1,000 ppm or 2,000 ppm serve as a guide as to when measures should be taken. Using Sensar helps you to notice changes in the ai quality and react immediately by ventilating the indoor space, your room, office, bed room, kitchen, etc.

Natural ventilation
Opening windows is the easiest way to let in fresh outside air. However, this method is not always sufficient, especially in rooms with a large number of people. You should always ventilate the room until indicator on the Sensar  is in green. Sometimes you have to create a good draught by opening doors and windows and wait for some time. You might to leave room to avoid being affected by draught.

Mechanical ventilation systems
Mechanical ventilation systems are installed in some buildings. These can be more effective than natural ventilation, especially if they are coupled with CO2 sensors that control the ventilation.

Time-controlled ventilation
Another option is timed ventilation. Here, the air is exchanged at set intervals, regardless of the current CO2 concentration.

Importance of ventilation technology
Choosing the right ventilation technology can make a significant contribution to preventing health problems. It is also an important factor in the context of the pandemic, as good ventilation can reduce the risk of infection.

By combining different methods and technologies, the CO2 concentration can be effectively reduced, which not only improves the air quality but also the general feeling of well-being.

Ventilation in living spaces

What does shock ventilation mean?

Shock ventilation refers to a ventilation method in which windows are opened wide for a short period of time – around five to ten minutes. The goal is rapid air exchange, removing stale air, excess moisture and carbon dioxide from the room and replacing it with fresh air. This method is particularly efficient because it does not allow the room temperature to drop too much and still ensures a high level of air exchange.

Why is shock ventilation important?

Throughout the day, activities such as cooking, showering or the presence of people produce moisture and increase the concentration of carbon dioxide in the room. Without adequate ventilation, this can lead to problems such as mold growth on the outside walls or an increase in humidity. This not only affects health, but can also increase energy costs for heating.

Tips and tricks for correct shock ventilation:

1. Ventilate rooms in the morning and evening: A tip is to open all windows wide for a few minutes, especially when getting up and before going to bed. This improves the air quality in the bedroom and other living spaces.
2. Cross ventilation: If possible, open windows in opposite rooms. This creates a draught and accelerates the exchange of air.
3. While cooking and showering: A lot of water vapor is created, especially in the kitchen and bathroom. Here you should ventilate briefly during and after cooking or showering.
4. Avoid ventilation via radiators: If windows are directly above a radiator, ventilation during the heating season can lead to rapid heat loss. Therefore, the heating should be turned down while ventilating.

Frequency of ventilation

Depending on the activity and number of people in the room, the need for ventilation can vary. As a general rule, living spaces should be ventilated two to three times a day. In rooms with high humidity, such as the kitchen or bathroom, it may be necessary to ventilate more frequently.

Shock ventilation in winter:

Winter brings its own challenges when it comes to ventilation. Cold outside and heat inside can lead to condensation and thus mold formation. However, proper ventilation can help save heating costs and create a healthy indoor climate. The key here is shock ventilation: open the window wide and allow a rapid exchange of air for ten minutes. This drives the damp, stale air out of the rooms and allows fresh, cold air to flow in.

Conclusion on the subject of shock ventilation

Shock ventilation is a simple and effective method to ensure a healthy indoor climate. It helps prevent mold growth, improve air quality and even save on heating costs. With the right tips and an awareness of the importance of fresh air, anyone can increase the comfort and health of their home or building.

Proper ventilation in special rooms:

Special rooms require special attention. In the bedroom, for example, it is important to ventilate before going to bed and immediately after getting up to ensure optimal air quality while you sleep. Rooms such as the kitchen and bathroom, where a lot of moisture is generated by activities such as cooking and showering, should be ventilated after each use to prevent mold from forming.

Cross ventilation for efficient air exchange:

Regardless of the season, cross-ventilation can ensure quick and efficient air exchange in all rooms. Opening windows in opposite rooms creates a draught that quickly transports stale air out and lets in fresh air.

Buy Sensar Air Quality Sensor and you will be able to control CO2 quality in your room.