AirVisual Node – Car


Inside the Car

Been inside the car doesn’t keep you safe from the air pollutants of the street and traffic at least if you don’t own a Tesla Car with Bioweapon Defense Mode activated.

I made a trip from my city Almeria to Malaga and back. The journey was approximately 4h long in total via the highway. The graphs are divided into two pieces. The first one is the trip from Almeria to Malaga and the second piece is the way back. On my way to Malaga the weather was rainy throughout the whole trip which I think worked as an air cleaner because the rain droplets trap PMs and don’t allow them to flow freely in the air. On my way back to Almeria there wasn’t any traffic at all on the road due to late hour of the trip (01:00am-03:00am), so there wasn’t any particular pollution in the air either.


Now let’s see what happens when you drive a car at pick hours at the city center and without raining to settle down air pollutants.

PM Dashboard CAR

There were two spikes over the recommended limit of 25μg/m3 and both times the car was still waiting behind a conventional bus on the traffic lights and some other cars were around as well.

In conclusion the air quality inside the car will decrease when you drive in busy streets due to Particulate Matter emissions by tyres, burning of fossil fuels in vehicles, asphalt rubber friction etc… Your car has got an air filter remember that you have to replace it and ask your mechanic if there is a better quality filter that you can install.


Do Zeolite Rocks absorb VOCs?


I was doing a research for ways to remove VOCs from the atmosphere without using electronic devices like air purifiers but through passive material. As a result I found about Zeolite Rocks which are claimed that can absorb formaldehyde, ammonia and other VOCs from the air or water passively.

As you may expect I purchased 500gr of small Zeolite Rocks to conduct an experiment. I want to mention here that is hard to find these rocks because they aren’t commercialized, it’s easier to find them as filters for aquarium because in general are used to remove ammonia from the water.

They also claim that the rocks are “rechargeable” by heating them in the oven in 200°C/400°F for 30min they can be used again and again.

I took daily measurements for 6 days without having the rocks anywhere near the sensor and the average result for the VOCs was 524ppb. After a week I placed under the AQI monitor 400gr of Zeolite Rocks and again I logged the measurements for a week. The average result for a week of VOCs with the rocks is 461ppd. A difference of 63ppb less VOCs.

After that I repeated the experiment, 6 days without rocks and 6 days with rocks but this time I isolated the room and I kept it without ventilation. The values were higher in this case and the rocks seemed like they couldn’t absorb VOCs any more.

In conclusion the rocks may absorb gases but you need a great quantity of rocks to achieve a good result, for example 100ppd less VOCs something which make it hard. Remember by opening the windows for a few minutes you can refresh the air quality immediately in case the outdoor air is in better conditions than the indoor.

Zeolite chart

AirVisual Node – Gym

On my complete review for AirVisual Node I expressed my gratefulness about the device’s ability to function off-the-grid which allows me to move it around places without any problem. In this article I will talk about my experience with the device in the Gym.


The last three months I am practising crossfit which is an intense workout and it does require a lot of deep and fast breaths, so I decided to check the air quality at the crossfit facility with the permission of the owner. The facility is quite big with an area of 105m²/1130,21ft² and a height of 4m/13ft. At the moment of the measurements there were 18 people working out in the facility. The results were very good, the CO2 didn’t pass the 466ppm during the whole workout session and there was only one big spike of Particulate Matter due to the use of powdered chalk. If you check the graphs you will notice some similarities between the CO2 and PMs, when the intension of the exercises were high the CO2 went up and the PMs as well.

There is a red part on the beginning of each graph, don’t pay attention in that area, I had my face close to the device as I was setting it up and the CO2 is normally high.

Airy DashboardAiry Dashboard

Stay tuned for the next article about the AirVisual Node in the car.