What’s CAP-AI

The most crucial thing to avoid infection
such as COVID-19, flu, cold, etc
is to keep the room well-ventilated at all times.

Carbon dioxide (CO₂) concentration in the room
tells whether ventilation is good or bad

The CO₂ concentration can be measures by CO₂ monitor

CO₂ monitors

When ventilation is sufficient
CO₂ concentration is 1,000 ppm or less
When ventilation is insufficient,
it exceeds 1,000 ppm.

When the CO₂ level in a room is always below 1,000 ppm,
Infection risk remains low.
When it exceeds 1,000 ppm,
Infection risk is high.

How to use CAP-AI

❶ Basal values
　Enter the following five values in

Infecter

Number of infected people

Non-Infecter

Number of non-infected people

Occupied

Total number of people in the room

Body Weight

kg

Room size

㎥

Duration

min

❷ Questions
　Entry the following values in

❸ Answers
　CAP-AI’s illustrates the following answers.

Entries

CO₂

Enter the value (ppm) displayed on the CO₂ monitor or an arbitrary CO₂ ppm.

Infecter

Enter the number of infected people in the room.
If the number is not specified, enter1person or the expected number.

Non-infecter

Enter the number of uninfected people in the room.

Occupied

The total number of people in the room (infecter + non-infecter).
Enter the number of infecters and the number of non-infecters, and then the total number of people in the room is automatically displayed.
If the number is not specified, enter the capacity or estimated numbers

Body weight (kg)

Enter the weight of one individual.

• Ex.1:Enter 60 kg as the Japanese average weight ( or entry your country’s av.wt.).
• Ex.2:Enter 40 kg as approx. value of 10- and 11-year-olds in the case of elementary school classroom.

Room size (㎥)

=Room area (frontage x depth) x ceiling height in ㎥

Duration (min)

Enter the (estimated) amount of time you are in the room.

Ventilation volume

Entry the ACH (Air Changes per Hour)
ACH is the number of times the total amount of air in the room or space is completely removed and replaced by outside air in one hour.

CO₂ (carbon dioxide) monitor

CO₂ monitor visualize infection risk and indoor air quality by using CAP-AI.

• In fresh air, the CO₂ concentration in the air is less than 1,000 ppm (0.1%).
• The breath we exhale contains CO₂. Its concentration is about 3% of exhaled air when doing light work.
• If people gather in a poorly ventilated room, the concentration of CO₂ will rise quickly.
  Ventilation discharged CO₂ to the outside, and the concentration of CO₂ decreases.
• If you always replace the room with fresh air through ventilation, viruses such as SARS-CoV-2, influenza,
  and colds will be discharged outdoors and disappear, resulting in low infection risk.
• In order to always breathe fresh air, it is necessary to keep the CO₂ concentration in the room below 1,000 ppm.
• If the CO₂ concentration exceeds 1,000 ppm, ventilation is insufficient.
• If you breathe fresh air with a CO₂ concentration of 1,000 ppm or less, you don't have to worry about the health effects of CO₂ (drowsiness, headaches, fatigue, tinnitus, productivity-decision-making/problem-solving, learning, etc.) or harmful air pollutants.