CO2 Monitors
CO2 Monitors
Monitoring the carbon dioxide (CO2) levels in your home or office can help you decide if you need to improve ventilation to reduce health risks associated with poor ventilation, which has been shown to cause symptoms like headaches and tiredness.
What’s in the kit:
- Aranet CO2 monitor
- Aranet4 User Manual
Tips for using CO2 monitors
*Information adapted from Toronto Public Library’s CO2 Monitoring for Indoor Air Quality Fact Sheet.
How much indoor CO2 is acceptable?
There are several factors that can cause fluctuating CO2 levels indoors, like increases in the number of people gathered in a space.
Generally, CO2 levels should be kept below 1,000 parts per million (ppm) whenever possible.
| Indoor CO2 in ppm | Ventilation performance with respect to the number and activity level of people in the space |
| 600 or under | Excellent ventilation |
| 601-800 | Good ventilation |
| 801-1000 | Fair ventilation |
| 1001-5000 | Poor ventilation |
| Over 5001 | Dangerous ventilation |
Other resources
- Residential Indoor Air Quality Guidelines – Health Canada
- Carbon dioxide in your home – Health Canada
- Improve indoor air quality in your home – Health Canada