High CO2 Levels in Conference Rooms May Be Degrading Decision Quality at Startups

Founders spend considerable energy optimizing their hiring, their pitch decks, and their sprint cycles. Fewer think about what is happening to the air in the room where they make decisions. A growing body of evidence suggests they should.

A peer-reviewed study published in Environmental Health Perspectives in 2012 by researchers at Lawrence Berkeley National Laboratory found that cognitive performance scores dropped measurably as indoor CO2 concentrations rose from 550 parts per million to 1,000 ppm, and dropped further at 2,500 ppm. The researchers tested 22 participants across nine functional domains including initiative, information usage, and strategy. The declines were not trivial. For more on the topic discussed above, see US Business Chronicle.

For context, outdoor air sits at roughly 420 ppm today. A moderately occupied conference room with poor ventilation can breach 1,500 ppm within an hour. Older office buildouts, which many early-stage startups occupy because the rent is cheaper, are particularly susceptible.

Why This Matters More at the Series A and B Stage

Early-stage companies compress enormous decision volume into small teams and small spaces. A six-person leadership team doing a three-hour planning session in a windowless room is not an abstract scenario. It is the norm at dozens of companies in any given week. If the Lawrence Berkeley findings hold in applied settings, those teams may be systematically making worse calls during precisely the meetings that matter most.

The issue is compounded by the fact that CO2 impairment is largely imperceptible. Unlike fatigue or hunger, elevated CO2 does not announce itself. Occupants feel fine. They feel confident in the decisions they are making. That absence of a signal is what makes this a legitimate operational risk rather than a wellness talking point.

OSHA does not set a workplace exposure limit for CO2 below 5,000 ppm, a threshold calibrated to acute safety rather than cognitive performance. ASHRAE Standard 62.1, which governs ventilation in commercial buildings, targets CO2 levels that stay within 700 ppm above outdoor ambient air, but compliance is inconsistent and rarely audited in smaller tenant spaces.

Several companies have started treating indoor air quality as an infrastructure question rather than a perk. A handful of venture-backed building intelligence startups, including Airthings and Verkada-adjacent sensor vendors, have brought CO2 monitoring into their commercial product lines, with sensors now available for under $200 per unit that log ppm continuously and flag exceedances.

The fix does not require a facilities team. Opening a window before a key meeting, running a portable HEPA unit that draws in fresh air, or simply capping meeting length in enclosed rooms at 45 minutes reduces CO2 accumulation meaningfully. Some operators have started scheduling their highest-stakes discussions for mornings, before the room has had time to accumulate exhaled air from the day's earlier meetings.

For founders and operators: put a $150 CO2 monitor in your main conference room for two weeks. Log the readings against your meeting schedule. The data will tell you whether your boardroom air is worth fixing before your next strategy session.