Fortunately, those results also turned out to be out well below worrisome CO2 levels.
There was a little more CO2 wafting around our desks — slightly less than 500 ppm — but that's still an acceptable level for work.
Clearly, we can't blame any lack of productivity on our office air.
But we weren't satisfied with a single result. So we headed into the middle of the crowded newsroom for a second test.
Roughly 100 BI employees were hard at work and breathing steadily.
Our test involved sucking air into a syringe and then pushing it out into a CO2-measuring vile built for greenhouses. As it turned out, our conference room air was performance-friendly.
CO2 concentrations hovered around 300 parts per million — about the same concentration of carbon dioxide found in the great outdoors. Very conducive to good work.
First we tested the CO2 concentrations in a conference room.
We expected that the CO2 level in an empty, confined space like this might differ from our open-office newsroom, where we work and breathe together all day. Because there aren't as many people in conference rooms 'outgassing' into the air, we figured there might be less CO2.
Then again, a meeting room can hold lots of groups throughout a busy day, and all those people expel carbon dioxide along with their opinions and presentations. A poorly ventilated conference room might be a perfect spot for some higher-than-ideal CO2 concentrations to brew.
Ultimately, designers and architects adopted new building ventilation standards to make sure that there's enough fresh air indoors.
We were desperate to know how our office fared.
Indoor carbon dioxide became a problem in the 1970s, when designers began making buildings more airtight. People started reporting feeling ill and less productive at work. The term 'sick building syndrome' was born.
Exposure to higher-than-average levels of carbon dioxide, concentrations upwards of 2%, can leave exposed individuals feeling faint, breathless, and dizzy.
In more serious cases, taking in too much carbon dioxide can put people in a coma or kill them.
In the study, 24 workers spent six days working at different CO2 concentrations. The participants were plucked from a range of professions, including engineers, marketers and programmers. The results from the small group suggested that even a slightly elevated CO2 level can have an impact on how well people work.
The researchers tested the participants with a range of decision-making tests at the end of each day.
On some days, workers went about their business in rooms where CO2 was circulating at 550 parts per million. On others, the concentration hovered at 945 ppm, and on the rest, they subjected participants to a high-carbon dioxide condition, at 1400 ppm. (The Centers for Disease Control generally considers places with CO2 levels above 1200 ppm 'inadequately ventilated.')
Study participants working under the heaviest concentration of CO2 performed 50% worse on cognitive tasks than they did in the low 550 ppm scenario. And when the workers were working in rooms with the medium CO2 concentrations (945 ppm), their cognitive test scores were 15% lower.
In other words, the researchers found that a little extra CO2 can make you act a lot dumber.
