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A day in the office with DESI Monitor

One day in our office

We want to show you how the air values in the office change over the course of a working day. Our key data:

Office size: 32m spread over two interconnected rooms. 

Number of employees: 4

At 09:40 we switched on our monitor. As you can see, everything is fine. The CO2 values ​​are very good.

We talk on the phone, talk to each other ... the laptops and printers are running. Every now and then someone gets a coffee or makes a tea. The small tea kitchen is located in the office.


An hour has passed. As you can see, the CO2 value increases significantly and the TVOC value (highly volatile foreign matter) also becomes noticeable. With the TVOC values, even the smell of coffee in the freshly brewed coffee can cause an increase in value. But even a strong perfume can be responsible for increasing values, the printing of documents, etc ...





Another hour later. Our everyday office life continues as normal. However, one eye is fixed on the monitor and registers the increasing numbers. Let's see how long we can sit warm. Incidentally, due to the heating air, our humidity is not optimal. At this low humidity we will never have problems with mold, but our mucous membranes are not necessarily comfortable. They become so much more vulnerable to colds because they dry out. So drink a lot.


So now the time has come - our values ​​require targeted action. In our case, that means opening doors and windows and setting them to a draft. This is of course not so pleasant at first, because it is cold - minus 8 degrees Celsius outside temperature.



After exactly 5 minutes of ventilation, the CO2 values ​​are back in the green area. But we leave a little longer open in order to further reduce the TVOC value. After 5 minutes the room temperature has not dropped yet.



So now the TVOC value is back in the green and we are closing the windows and doors. The internal temperature only dropped 1 degree. However, our humidity continued to decrease due to the dry, cold air. We still have to remedy this, because a healthy air humidity between 50 - 60% would be ideal for our mucous membranes.



Another hour has passed. And the values ​​are increasing significantly. They're still ok, but we're still keeping an eye on them.



After two hours with four people in the office, the numbers are pretty high again. From a CO2 value of 2000 we have to ventilate again. As you can see, the humidity has remained consistently low. The TVOC value is also increased again.



About 30 minutes ago two colleagues left for the evening. Now the two of us are sitting in the office. The CO2 value has fallen. Certainly also due to the fact that the door was open briefly when the colleagues left, and that now less oxygen is simply used. Since it is Friday, we are now also going to end the workday. Conclusion: Thanks to the monitor, we know when the air needs to be refreshed. It makes us feel good knowing we are doing something to reduce the risks of aerosol contamination in addition to keeping our distance and putting on a mask when we get up.