15%
Lower cognitive test scores at about 945 ppm CO₂ than in well-ventilated air, in a controlled study of 24 office workers. At about 1,400 ppm, scores were 50% lower.
Allen et al. 2016, Environmental Health Perspectives
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Office CO₂ levels: find out why the air gets stuffy
Office CO₂ levels are easy to track today. Many offices have a monitor, but few people look at the data it collects. I analyze your readings, find the pattern behind the stuffy afternoons, and give you clear steps to fix it.
Why office CO₂ levels creep up during the day
Office CO₂ levels rise whenever people sit in a room and breathe. You can't smell CO₂. But it's a good signal for how much stale air is in the room. When ventilation can't keep up, the number climbs all morning and peaks in long meetings.
A monitor alone doesn't solve this. A red light tells you the air is bad right now. It doesn't tell you why. Is the HVAC set too low? Is the conference room booked for too many people? Do the windows stay shut all winter? You only see the answer when you look at weeks of data side by side.
700 ppm
Above outdoor air is a long-standing ventilation benchmark. With outdoor air near 420 ppm, that means roughly 1,100 ppm indoors.
ASHRAE Standard 62.1 guidance; NOAA Global Monitoring Laboratory
90%
Of their time Americans spend indoors, on average.
U.S. EPA, Indoor Air Quality
How I analyze your office CO₂ data
Upload your data
Send me the exports from your sensors through a secure upload link. CSV, Excel, or app exports all work. No site visit needed.
Find the cause
I look at when CO₂ rises, how fast it drops after ventilation, and which rooms cause trouble at which times. That shows whether the issue is occupancy, HVAC settings, or both.
Get a clear report
Within 1–2 weeks you get a plain-English report with charts and specific recommendations. Examples include new HVAC schedules, room capacity limits, or a ventilation check.
Thought about it but never got around to it? Getting started takes two minutes.
- 01
Tell me what's going on
Use the inquiry form to tell me which room it is and what bothers you. It takes two minutes.
- 02
Send data or start measuring
If you already have a monitor, send me the export through a secure upload link. If not, I'll tell you which device is enough and where to put it.
- 03
Get your answer
Within one to two weeks, you get a short report: what's going on, why, and what to do first. No site visit needed.
Questions
Do I need to buy equipment?
Usually not. If your CO₂ monitors already log data, that's enough. If they don't, I help you plan which sensors to use and where to place them.
How much does it cost?
It depends on the number of rooms and how much data you have. You get a clear quote before any work starts.
Is my data safe?
Your files come in through a secure upload link and are used only for your analysis. I don't need employee names, just timestamps and readings.
Can HR or facility managers use the report?
Yes. The report is written so you can share it with leadership or your building manager. It shows the problem in charts, not jargon.