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Purifying the Air in a Phone Booth

Take care of the air quality inside the phone booth to prevent allergies and pathologies

In July 2022 we tested the air inside a phone booth installed in a coworking space. Many people use it for their daily meetings, but it’s obvious to think about the air quality in such a small space. Also consider the danger of contagion from Covid that can be spread to people who will come to the phone booth later.

So, we grabbed an air quality monitor and placed our portable air purifier inside. We entered the phone booth, closed the door and started working.

In the first 10 minutes the appliance was turned off and the increase in formaldehyde (HCHO) and volatile organic compounds (VOC) increased dramatically.

From the 10th minute onwards the device was switched on and the positive effects were noted, briefly reaching an acceptable air quality in 10 minutes. After 20 minutes the values are stable. It is interesting to note that fine particles (PM2.5 and PM10) remain constant and CO2 increases slightly, remaining well below the problematic threshold.

SpazioSafe™ does not cause a significant increase in noise inside the phone booth. At speed 1 the fan is only 25dB, at speed 2 it is 32dB, which is similar to rustling leaves. And with a power consumption of 22W only.

It was intuitive, but after this test we have proof: in such a small space, we need to pay attention to the quality of the air we breathe, and also limit the spread of viruses and bacteria. Installing an air purifier in a telephone booth is a decision that needs to be seriously considered.

SpazioSafe™, our air purifier, has a dual function: in addition to purifying the air from dust and allergens, it inactivates viruses and bacteria. The tests conducted by the University of Bologna, in Italy, with our device have demonstrated efficacy against Coronaviruses at 99.998%. Thus, you can always have your telephone booth sanitized and purified, without any intervention by the cleaning staff.

Test Aria Phone Booth con Safetily

Formaldehyde (HCHO) causes eye, nose and throat irritation, sneezing, coughing, fatigue, and skin rash; subjects susceptible or immunologically sensitized to formaldehyde may have adverse reactions even at lower concentrations. The WHO has set a guide value of 0.100 mg/m3 (average over 30 minutes).

VOCs can cause a wide range of effects: from sensory discomfort to serious changes in health. At high concentrations in indoor environments, they can cause effects on numerous organs or systems, in particular the central nervous system. Some of them are recognized as carcinogens by the WHO. Acceptable levels range from 0.300 to 0.500 mg/m3.

High carbon dioxide (CO2) levels range from 2000 ppm upwards for offices. High CO2 concentrations have a direct impact on people’s overall well-being, health, and cognitive skills.

Exposure to fine particles (PM2.5 and PM10) can cause short-term health effects such as eye, nose, throat and lung irritation, coughing, sneezing, runny nose, and shortness of breath.

We recorded a video during the test, from which we extracted the data that has been inserted into the graph above. As you can see, the levels of HCHO and VOC rise up to dangerous limits for health and then return to normal after turning on the SpazioSafe™, while fine particles (PM2.5 and PM10) remain constant and CO2 increases slightly, remaining well below the problematic threshold.