CO2 monitor

The health and safety team at work have got me a proper CO2 monitor for my office. Unfortunately it turns out to be bot very well ventilated. This is after I had one window open for an hour or so. Hut hey, they're fixing the crack in one of the other windows tomorrow so I'll be able go open that one too. (The other two are a bit hard to reach).

We breathe out CO2, so monitoring it can tell you that lots of people have been breathing in a space with not enough ventilation. An unoccupied room would read near 500. And a well ventilated one more like 700-800. I do also have an air filter, so this is less bad than it could be! Basically i want to avoid getting the flu at work again (or worse).