3 ms·
> Some classrooms have over 6x the CO2 concentration than others. Some classrooms have > 2000ppm every day. That's basically the difference between having an o
by antisthenes 4y ago
> Some classrooms have over 6x the CO2 concentration than others. Some classrooms have > 2000ppm every day.
That's basically the difference between having an open window or not. If your ventilation system is designed to get fresh air from the outside, you'll have <600 PPM, if not, you'll have 2000+
How do I know? I bought a CO2 meter and worked in an old office building that didn't get fresh air from the outside.
- dzhiurgis 4y agoMy dad has a shoddy heat recovery ventilation system which he throttled down to a minimum. I bought co2 meter and turns out it barely does anything, but he won’t believe me.
- stuaxo 4y agoSounds counter productive turning it to a minimum ? (I guess it could be shoddy in many other ways too!).
- dzhiurgis 4y agoOver 60% it becomes quite audible, at 100% it can be annoying. It’s a ducted balanced system. If we have 4-5 adults in living room - it doesn’t keep up even at 100%. Ir I keep most doors open at night - it’s okay. Air quality is always good there, it’s mostly to manage humidity and it does it too well once it’s freezing outside.