Category: indoor

Thailand School sets the AQ bar high – An example to be followed

Sotirios Papathanasiou4 Comments

On Earth, there are over 7 billion people but very few of them have a clear vision of a future and how important air quality is for our health. You will find politicians that are unwilling to enforce air quality laws, you will find educators scared to share with parents the indoor air quality, and you will find lots of people unaware of what they breathe or what they burn.

Among all of them, you will find very few people that want to make things right for the rest. In this case, the Head of School at Prem Tinsulanonda International School in Chiang Mai, Thailand was brave and educated enough to recognize the power of air quality data.

Chiang Mai is a city in exotic Thailand that always ranks in the top polluted cities in the world between March and April. The reason is the burning season. I was taught about the 4 seasons (Spring/Summer/Autumn/Winter) at school but it turns out that they have a fifth season − normally in March and April − when crop waste burning and forest fires fill the air with particles, PM2.5 levels can reach 300 μg/m³.

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Review: Aranet4 HOME – CO2 Monitor [EN/ES/GR]

Sotirios Papathanasiou12 Comments

Impact-Site-Verification: 8822d984-d7e0-4efd-9190-e8b1d8a8a633

(Scroll down for the Spanish or Greek version of the review/Desplácese hacia abajo para la versión en español o Griega/ Μετακινηθείτε προς τα κάτω για την ισπανική ή την ελληνική έκδοση της αξιολόγησης)

English
Español
Ελληνικά

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It is not a coincidence that everywhere you look nowadays you see a small, square, and white monitor with a screen in the middle that displays some numbers! Well, this is Aranet4 which was developed by a Latvian company.

Aranet4 is a small and mighty CO2 monitor that surprise people for two reasons. First of all, it is very comprehensive, and secondly, most people are intrigued by the technology of the display as it uses an e-ink display and, to the untrained eye, looks like a simple sticker.

The commonly found AA batteries can operate the monitor for up to 2 years so you don’t have to worry about them. It uses a single channel non-dispersive infrared (NDIR) sensor technology for accurate CO₂ measurements, read more here.

Specifications

  • Carbon Dioxide (CO2) NDIR
  • Temperature (ºC/ºF)
  • Relative Humidity
  • Atmospheric Pressure
  • e-ink Display
  • Bluetooth
  • Buzzer (Alarm)
  • AA Battery Operated (up to 2 years)
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Episode 2: Athens, Greece – Wood Burning/Fireplaces

Sotirios Papathanasiou6 Comments

Episode 2: Athens, Greece – Wood Burning/Fireplaces – See The Air | Real Life Stories

[EN]This is a bilingual episode. If you want to listen to the Greek version please go to minute 14:52.In this episode, Andrea, who lives in Athens Greece, will share with us his everyday experience with air pollution.The main source of air pollution in his city during winter is wood burning/fireplaces.Andrea tries to educate the Greek community about the dangerous of air pollution on his blog.Website: https://cleanairingreece.org/Twitter: @cleanairgreeceFacebook: https://www.facebook.com/abonettiphoto/Please share and rate this episode with 5 stars.[GR]Αυτό είναι ένα δίγλωσσο επεισόδιο. Εάν θέλετε να ακούσετε την ελληνική έκδοση, πηγαίνετε στα 14 λεπτά και 52 δευτερόλεπτα.Σε αυτό το επεισόδιο, ο Andrea, που ζει στην Αθήνα, θα μοιραστεί μαζί μας την καθημερινή εμπειρία του με την ατμοσφαιρική ρύπανση.Η κύρια πηγή ατμοσφαιρικής ρύπανσης στην πόλη του κατά τη διάρκεια του χειμώνα είναι καύση ξύλου / τζάκια.Ο Andrea προσπαθεί να εκπαιδεύσει την ελληνική κοινότητα σχετικά με την επικινδυνότητα της ατμοσφαιρική ρύπανση στο blog του.Website: https://cleanairingreece.org/Twitter: @cleanairgreeceFacebook: https://www.facebook.com/abonettiphoto/Παρακαλώ μοιράστε και βαθμολογήστε αυτό το επεισόδιο με 5 αστέρια.

[EN]
This is a bilingual episode. If you want to listen to the Greek version please go to minute 14:52.

In this episode, Andrea, who lives in Athens Greece, will share with us his everyday experience with air pollution.
The main source of air pollution in his city during winter is wood burning/fireplaces.
Andrea tries to educate the Greek community about the dangerous of air pollution on his blog.

Website: https://cleanairingreece.org/
Twitter: @cleanairgreece
Facebook: https://www.facebook.com/abonettiphoto/

Please share and rate this episode with 5 stars.

[GR]
Αυτό είναι ένα δίγλωσσο επεισόδιο. Εάν θέλετε να ακούσετε την ελληνική έκδοση, πηγαίνετε στα 14 λεπτά και 52 δευτερόλεπτα.

Σε αυτό το επεισόδιο, ο Andrea, που ζει στην Αθήνα, θα μοιραστεί μαζί μας την καθημερινή εμπειρία του με την ατμοσφαιρική ρύπανση.
Η κύρια πηγή ατμοσφαιρικής ρύπανσης στην πόλη του κατά τη διάρκεια του χειμώνα είναι καύση ξύλου / τζάκια.
Ο Andrea προσπαθεί να εκπαιδεύσει την ελληνική κοινότητα σχετικά με την επικινδυνότητα της ατμοσφαιρική ρύπανση στο blog του.

Website: https://cleanairingreece.org/
Twitter: @cleanairgreece
Facebook: https://www.facebook.com/abonettiphoto/

Παρακαλώ μοιράστε και βαθμολογήστε αυτό το επεισόδιο με 5 αστέρια.

Spring Clean Your Indoor Air Quality

Sotirios Papathanasiou6 Comments

During Spring (March, April, May) most people in Northern Hemisphere dedicate extra time to clean and organize their house for the warmer months. Many times we start this process unconscious of the dangerous chemicals present in cleaning products that may be released into the indoor environment. What can we do to improve indoor air quality, especially during spring when many people suffer from allergies?

Here I will conclude a few tips and steps in order to make the most out of this process and detox your house from nasty chemicals and other pollutants/allergens.

1st Tip – Bed Linen

It is important to ventilated bed linen and in case this is not an option we can always change them with clean ones. It is hard to tell how often someone should change the bedsheets but I would recommend at least 2 twice a month. Avoid synthetic textiles like Acrylic, Polyester, Nylon, etc, and invest in good cotton or silk (expensive) sheets and pillowcases as they offer the most comfortable experience, and they don’t pollute the environment once they are washed.

Dead skin and hair can build up and we don’t want to feed dust mites. According to House Dust Biology by J. Bronswijk human skin particles make up approximately 53% of household dust which leads me to the next tip.

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Review: XT Mini by Ethera Labs

Sotirios Papathanasiou1 Comment

Managing air quality monitors (AQM) in buildings is not always an easy task especially if you have deployed a lot of them. When there are many rooms that you have to take into consideration it can become very costly, very fast to equip all those rooms. Is there a way to monitor rooms without an AQM?

Well, it turns out there is a way to monitor the environmental and air quality conditions in rooms that do not have physical monitors nowadays. How?

Ethera Labs, which is a French company, with over 10 years of experience in professional IAQ solutions has integrated powerful Machine Learning (ML) algorithms that predict the conditions in rooms where air quality monitors are not installed, yes that’s right, you have read correctly. They have trained special neural networks by taking a lot of parameters into consideration in order to predict accurately the conditions and alerts users in case they need to take actions or even address an AQ/Environmental incident automatically.

By connecting the station to BMS, they manage to achieve energy efficiency while directly managing the ventilation system, as well as portable air purifiers or giving building operator the right information in advance so they can take action at the right time. They achieve two goals, great air quality and energy efficiency.

Hardware-wise Ethera Labs offers an arrange of monitors that can address different building specifications and needs. In this article, I will review the Mini XT Basic (MX-KIT020) and the NEMo Cloud/Supervision Cloud platforms.

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Review: Aether Air HA30 an in-Vehicle Air Purifier

Sotirios Papathanasiou5 Comments

Commuting to work is proved to contribute the biggest daily exposure to air pollutants according to the University of California. Car filters are not very good at filtering out PM1, PM2.5, and PM10 particles from vehicle emissions as they were originally designed to catch large particles like dust and pollen. Gas filtration is non-existence even today in any vehicle, as a result, drivers and vehicle passengers breathe notorious toxic fumes.

Although I believe that if you live in a city and you work in the same city, you should find a better way to commute, for some people this is not an option. Consequently, they need to find a way to protect themselves and mitigate their exposure to air pollution.

Aether Air HA30 is an in-vehicle air purifier capable of filtering particulate matter and eliminating nitrogen dioxide (NO2) among other chemicals.

It uses the same technology as the HA500 domestic purifier but in a smaller package. The D-Orbital Nano Oxide (DNO) filter, which is an innovative filtration system invented by the founding CTO of Oxford Catalyst plc (a leader in novel industrial catalysts)” and a HEPA 13 filter.

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How to Use CO2 Monitors

Sotirios Papathanasiou2 Comments

I see a lot of pictures on social media platforms where people measure Carbon Dioxide (CO2) concentrations in indoor environments incorrectly.

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Review: Kaiterra Sensedge Mini for Business and Green Buildings

Sotirios Papathanasiou7 Comments

There is a demand for Green Buildings lately, which focus on the comfort and health of the building’s occupants. Energy efficiency was the original target for most of the green buildings certifications programs, but they have evolved, and they now focus on many more aspects of the indoor environments. Indoor Air Quality has become the number one priority for many green building certifications, and in order to be certified, there are strict rules for ventilation and AQ monitoring.

Here comes Kaiterra Sensedge Mini, which is a RESET certified indoor air quality monitor. The Sensedge Mini is a calibrated real-time monitor that has to be placed in buildings that wish to obtain a Green Buildings certification.

The Sensedge Mini uses two removable sensor modules to replace the traditional, costly calibration processes for long-term accuracy with minimal maintenance.

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Study: Taking a closer look at the air quality in classrooms

Sotirios Papathanasiou4 Comments

After almost two months of asking local schools for permission to install air quality monitors in their classrooms, on the 4th of December, a local school decided to grant me access.

In my city, Almeria, Spain, there are about 110 schools. I didn’t apply to all of them because each time I managed to find a way to contact them, I had to arrange a meeting in order to explain to them what I wanted to do, and all this process takes time. I managed to contact nine schools.

For this study, schools didn’t have to pay anything, so money wasn’t the issue for their refusal. They were worried about what will happen if the results were disappointing and negative. I tried to explain to them that the aim of the study is to understand what is going on in the classroom, in real conditions, with real students. I don’t want to discredit the school either the local authorities that manage the budget for the school. For this reason, I will keep the name of the school private.

Monitors

The monitors that I have installed for the study are made by Airthings. There are two Wave Plus, which include a CO2 sensor by Senseair. The sensor is called Sunrise, and it is an ultra-low-power, high precision NDIR sensor. Accuracy (CO2) ±30 ppm ±3% of reading. Finally, it features a self-correction system that allows them to auto-calibrate every 180 hours. I also have included a Wave mini monitor in the teacher’s office room. 

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Things no one talks about: Flatulence and Indoor Air Quality

Sotirios Papathanasiou4 Comments

Have you ever wondered if the gases we produce as humans are toxic to those who live with us?

It is a taboo but I think we all have thought about it at one moment in our lives. Scientifically known as flatus but commonly known as a fart, many of us even use funny expressions to cope with this uncomfortable situation they create like Acid-rain maker, After the thunder comes the rain, Baking brownies, Death Breath, Fire a stink torpedo, pass the gas, etc…

Let’s take a step back and analyze the chemical composition of a flatus. More than 99% of the volume of flatus is composed of non-smelly gases. These include oxygen (O2), nitrogen (N), carbon dioxide (CO2) hydrogen (H) and methane (CH4), keep in mind, methane is a colorless, odorless gas and nitrogen is not produced in the gut, but it is a component of environmental air. The remaining trace (<1% volume) compounds give flatus its smell which comes from a combination of volatile sulfur compounds. Hydrogen sulfide (H₂S), methyl mercaptan (CH4S), dimethyl sulfide (C2H6S), dimethyl disulfide (C2H6S2), and dimethyl trisulfide (C2H6S3).Read More »