https://www.pistack.xyz/tags/co2/ Recent content in Co2 on Pi Stack Hugo en-us Sat, 06 Jun 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-06-06-self-hosted-co2-air-quality-monitors-airgradient-enviroplus-canairio/ Sat, 06 Jun 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-06-06-self-hosted-co2-air-quality-monitors-airgradient-enviroplus-canairio/ <h2 id="introduction">Introduction</h2> <p>We spend approximately 90% of our time indoors, yet most people have no idea what&rsquo;s in the air they&rsquo;re breathing. Elevated CO2 levels — common in modern, well-sealed buildings — directly impair cognitive function. Studies show that CO2 concentrations above 1,000 ppm reduce decision-making performance by 15%, and levels above 2,500 ppm can cause a 50% decline in complex reasoning tasks. Volatile organic compounds (VOCs) from furniture, cleaning products, and building materials contribute to &ldquo;sick building syndrome.&rdquo; Particulate matter (PM2.5) from cooking, candles, and outdoor pollution infiltrates indoor spaces.</p>