Fresh air monitor - Measure fresh air with air-Q
Air quality

Fresh air monitor: Why fresh indoor air is measurable

Why good indoor air quality is not just a feeling: What a fresh air monitor measures, why fresh air indoors is crucial, and how air-Q helps to visualize air quality and improve it in a targeted manner.

Author:

Emily

Date:

26.2.2026

What is a fresh air monitor?

A fresh air monitor is a device for monitoring indoor air quality. It indicates when the air indoors is stale and fresh outdoor air is needed. The CO₂ value is usually used as the main indicator, as it reliably reflects how polluted the air is by the people present.

Modern fresh air monitors also measure temperature and humidity. The air-Q goes one step further: in addition to CO₂, it also measures pollutants such as particulates, volatile organic compounds (VOCs), and radon. This gives users a comprehensive picture of their indoor air quality. 

Why fresh air indoors is so important

People spend most of their day indoors. Without sufficient fresh air, CO₂, moisture, and pollutants often accumulate unnoticed. The consequences range from concentration problems and fatigue to health issues.

A fresh air monitor shows when it is time to ventilate. Devices such as air-Q also help to determine whether poor air quality is solely due to a lack of fresh air or whether there are other pollutants that cannot be removed by simply ventilating the room.

Why fresh indoor air should be measurable

Fresh air is not something you notice by chance. Often, you only notice poor indoor air quality when your concentration and well-being are already suffering. A fresh air monitor makes the air measurable and provides objective data.

A measuring device such as the air-Q can detect not only CO₂ peaks, but also other pollutants that affect health and comfort. Measurable values create transparency and provide clear recommendations for action: open windows, turn on ventilation, or take other measures.

What does a fresh air monitor actually measure?

A fresh air monitor does not directly measure "fresh air," but rather signs of its deficiency. Typical metrics are: 

  • CO₂: as a key indicator of air consumption
  • Temperature: important for comfort and indoor climate
  • Humidity: a factor in well-being and mold risks

The air-Q upgraded measurements to include pollutants such as particulates, VOCs, radon, and more. This means that the device not only indicates when ventilation is required, but also why the air is polluted.

Is a CO₂ monitor sufficient?

A simple CO₂ monitor can help identify when ventilation is needed. However, it does not provide any information about other pollutants or chemical contaminants that also affect air quality.

A fresh air monitor such as the air-Q enables a differentiated assessment. Users can identify causes instead of simply reacting to a single measurement value.

Who would benefit from a fresh air monitor?

A fresh air monitor is particularly useful for: 

  • Offices and conference rooms
  • Schools, daycare centers, and educational institutions
  • Living rooms and bedrooms
  • home office workstations

If you want to know not only when to ventilate, but also why the air is polluted, you will benefit from a comprehensive device such as the air-Q.

Fresh air is not a feeling, but a measurable value

A fresh air monitor provides clarity about indoor air quality. It replaces gut feelings with measurable data and helps you ventilate your home in a targeted manner. The air-Q goes one step further: it reveals which factors are polluting the air and shows when ventilation alone is not enough.

Good indoor air quality does not happen by chance. It can be measured, evaluated, and specifically improved.

References

The images were created using AI.

Check indoor air yourself with our smart air-Q
Measure for yourself with our air measuring device with 14 sensors from Germany

Summary

Why should fresh indoor air be measurable?
keyboard_arrow_down
Fresh indoor air cannot be reliably felt or smelled. Poor air quality is often only noticed when concentration and well-being are already suffering. A fresh air monitor makes indoor air measurable and provides objective data that can be used as a basis for targeted ventilation or further measures.
What is a fresh air monitor?
keyboard_arrow_down
A fresh air monitor is a device for monitoring indoor air quality. It indicates when the air indoors is stale and fresh outdoor air is needed. The most important measurement is usually CO₂, as it reflects the degree of air pollution caused by the people present.
Why is fresh air so important indoors?
keyboard_arrow_down
Since people spend most of their day indoors, CO₂, humidity, and pollutants can quickly build up. A lack of fresh air can lead to fatigue, concentration problems, and health issues. A fresh air monitor helps to detect this stress early on.
What does a fresh air monitor actually measure?
keyboard_arrow_down
A fresh air monitor does not directly measure fresh air, but rather signs of its deficiency. These include primarily CO₂, temperature, and humidity. Devices such as the air-Q also detect pollutants such as particulates, VOCs, and radon, thereby indicating not only the need for ventilation, but also the causes of poor air quality.
Is a CO₂ monitor sufficient for assessing indoor air quality?
keyboard_arrow_down
A CO₂ monitor can indicate when ventilation is needed, but does not provide any information about other air pollutants. For a comprehensive assessment of indoor air quality, a fresh air monitor with advanced measurement functions is more useful, as it can detect various pollutants simultaneously.
Who would particularly benefit from a fresh air monitor?
keyboard_arrow_down
A fresh air monitor is particularly useful for offices, schools, daycare centers, living rooms, bedrooms, and home office workspaces. If you want to know not only when to ventilate, but also why, you will benefit from a comprehensive device such as the air-Q.
air-Q Air Quality Meter

Monitor air quality, all air components and environmental influences with the air‑Q . For your health and performance.