High CO2 in Meeting Rooms Degrades Developer Decision Quality

Research on CO2 and cognition points to a consistent finding: elevated indoor CO2 levels correlate with measurable drops in decision-making quality, focus, and working memory. Office meeting rooms, particularly those with poor ventilation and high occupancy, routinely hit CO2 concentrations that impair the kind of reasoning engineers and founders rely on during high-stakes sessions.

For developers, this is an operational concern. Architecture reviews, incident postmortems, sprint planning, and technical interviews all happen in rooms. If CO2 is high during those sessions, participants are not operating at baseline. The decisions that come out of those meetings are downstream of a variable most teams never measure.

The post from Mike Bowler's blog makes the case that this effect is underappreciated in technical organizations, where slowdowns get attributed to process or people before environment is considered. A CO2 monitor is cheap. Replacing a bad architectural decision made in a stuffy room is not.

Practical remediation is straightforward. Open a window or prop a door before a decision-heavy meeting. Run a portable CO2 monitor and set a threshold above which you reschedule or move outside. Prefer asynchronous written decision records for anything consequential, since written reasoning is produced and reviewed under variable conditions that can at least be self-selected.

For remote-first teams, this is less of a daily concern but still relevant during in-person offsites and planning sessions. The same physics applies in hotel conference rooms and co-working spaces.

The takeaway is narrow and actionable: treat room air quality as part of meeting hygiene the same way you treat agenda prep. Measure CO2. Ventilate. Move the important conversations to conditions where participants can actually think.

Source