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9. Carbon dioxide levels and guidelines
400 PPM Normal outdoor air level
400 ~ 1000 PPM Typical level indoors with good ventilation.
NOTE: If CO2levels are low when building is sealed and occupied, check for
overventilation (too much fresh air = energy wasted).
>1000 PPM ASHRAE and OSHA recommended maximum level in a closed room.
Considered maximum comfort level in many countries.
>1200 PPM Poor air quality - requires ventilation.
>2000 PPM According to many studies this level of CO2produces a significant increase in
drowsiness, tiredness, headache lower levels of concentration and increased
likelihood of spreading respiratory viruses like colds, etc.
>5000 PPM OSHA and NIOSH first threshold for safety. Maximum allowed concentration within
an 8 hour working period.
10. Maintenance
We recommend to manually test CO2Monitor once a month by pressing and holding the test button.
Dust is a major cause of false alarms. Therefore, clean the CO2Monitor once a month. Use a vacuum
cleaner to gently remove any accumulated dust along the sides of the CO2Monitor. Never use a wet cloth
or detergent to clean your CO2Monitor. Clean the device with a soft, damp and lint-free cloth. Make sure
that no moisture enters the housing. Do not use any sprays, solvents, alcohol-based cleaning agents or
abrasive cleaners, but only clean water to moisten the cloth.
11. Warnings
This manual contains important safety information about the CO2Monitor.
Read the manual carefully and keep it in a safe place for future reference.
Do not open the device in case it is damaged.
Do not remove any safety signs, stickers or labels from the device.
Keep all safety signs, stickers and labels legible condition.
This product cannot be used in factories, warehouses and other industrial environments that may be in
high CO2concentration for a long time.
If the product is to be placed in a narrow space, the space should be well ventilated, especially the two
diffusion windows should be in a well-ventilated position.
The product should be away from heat source, and avoid direct sunlight or other thermal radiation.
This product should not be used in the environment with high dust density for a long time.
