You can get one for $60-$100 on amazon. I'd say it's worth it. What gets measured gets managed. If you can deduct such expenses, even better. And the effects on

You can get one for $60-$100 on amazon. I'd say it's worth it. What gets measured gets managed. If you can deduct such expenses, even better. And the effects on cognitive function of high co2 are stark, according to the linked article. These two had good reviews on amazon. Same company, one keeps a log, one just displays current. I ordered the one with a log. https://www.amazon.com/Autopilot-Desktop-Monitor-Data-Logger/dp/B01FYWU2IS/ https://www.amazon.com/Autopilot-Desktop-Monitor-Data-Logger... https://www.amazon.com/Autopilot-APCEM-Desktop-CO2-Monitor/dp/B008NPA18A/ https://www.amazon.com/Autopilot-APCEM-Desktop-CO2-Monitor/d...