Month: January 2024

Ventilation Is Not Always An Option & Ventilation Needs to Be Done Correctly

Sotirios Papathanasiou1 Comment


Part 1: Ventilation Is Not Always An Option

Ventilation isn’t always an option in all areas and indoor spaces. Here are some key reasons why:

Environmental challenges:

  • Extreme weather: In very hot or cold climates, opening windows can be impractical or counterproductive. In scorching temperatures, opening windows might invite more heat in, while in freezing temperatures, it can cause heat loss and discomfort.
  • Air pollution: In areas with high levels of outdoor air pollution (e.g., traffic fumes, industrial emissions, wildfires), opening windows can actually worsen indoor air quality by bringing in the polluted air.

Space limitations:

  • Windowless rooms: Basements, interior rooms, and some commercial spaces like server rooms often lack windows, making natural ventilation impossible.
  • Small or airtight spaces: Tiny apartments, trailers, and even some modern, energy-efficient houses can be so tightly sealed that natural ventilation is insufficient.
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Let’s Talk about the Elephant in the Room, Carbon Dioxide (CO2)

Sotirios PapathanasiouLeave a comment

As an indoor generation, we spend our lives between walls, making the quality of the air we breathe there essential for our health and well-being. While many pollutants lurk within our buildings, carbon dioxide (CO2), often associated with climate change, might be closer than you think – impacting not just the environment, but also your cognitive abilities.

In low concentrations, CO2 is naturally present in the air we breathe, primarily released from our own respiration. However, poorly ventilated indoor spaces can lead to a buildup of this colorless, odorless gas, potentially reaching levels detrimental to occupants. The effects go beyond drowsiness or headaches, potentially impacting our ability to think clearly and perform tasks effectively.

Studies have shown a clear link between elevated CO2 levels and declines in cognitive function. In one study, researchers exposed healthy adults to various CO2 concentrations while they performed cognitive tasks. They found that even at moderate levels (around 1,000 parts per million, ppm), compared to fresh air conditions, participants experienced:

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Ventilation Challenges and Pathogen Spread in High-Polluted Environments

Sotirios Papathanasiou3 Comments

Indoor air quality (IAQ) is a crucial aspect of human health and well-being. However, achieving adequate ventilation in homes and other indoor spaces can be challenging, particularly when outdoor air pollution levels are elevated due to smoke from wood-burning stoves. This article explores why poor ventilation in polluted environments poses a heightened risk of pathogen spread.

Factors Hindering Ventilation in Polluted Environments

Wood-burning stoves, used for heating and cooking, release particulate matter (PM), nitrogen oxides (NOx), and carbon monoxide (CO) into the atmosphere. These pollutants can accumulate in extended areas, especially under certain weather conditions. Normally, warm air rising from the ground carries pollution upwards, dispersing it into the atmosphere. However, during the winter, a warm layer of air can settle over a city like a lid, trapping cold air and pollutants near the ground. This phenomenon, known as a thermal inversion, occurs when a warm air mass above restricts the upward movement of cold, denser air, trapping it along with pollutants close to the surface. Thermal inversions are particularly prevalent in cities like Los Angeles, Mumbai, Granada, and Mexico City, where cold, dense air gets confined within mountain basins or valleys.

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Air Pollution Chronicle (Granada, Spain Edition)

Sotirios PapathanasiouLeave a comment

They say that good air quality is a fundamental right for all, and at the same time, they say that 99% of the population worldwide is exposed to air pollution above WHO Air Quality Guidelines. Mixed messages here. Even though I have already shared the story on a Tweet thread, I decided to write an article as well because of the permanence of the article and because it is easier to share.

December 17th, 2023

I arrived in Granada, Spain for the holidays. A blanket of smoke was covering Granada and the small towns around with a total area of over 100 km2. Although I was super tired, the intense smell of smoke inside the apartment and the fact that I knew that there was a lot of particulate pollution indoors didn’t permit me to sleep well.

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