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CAP-AI

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
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.

CAP-AI helps you prevent infection and live with healthy, fresh indoor air.
❶ Infection risk for occupants from CO₂ and ventilation level
❷ CO₂ and ventilation level for preventing infection
❸ Ventilation volume for healthy and fresh air

How to use CAP-AI

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

Questions
 Entry the following values in

 CO₂ concentration (ppm) for CAP-AI-CK

 Ventilation volume (ACH) for CAP-AI-VK

 Ventilation volume (ACH) for CAP-AI-SN

Answers
 CAP-AI’s illustrates the following answers.

CAP-AI-CK:ACH, Infection Risk
CAP-AI-VK:CO₂ level, Infection Risk
CAP-AI-SN:Air freshness/Contamination

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.
CO₂ monitors make indoor air pollution visible.
Clean, fresh air maintain a CO₂ concentration below 1,000 ppm through ventilation.
Under such indoor air quality, infection risk is low.
The higher is the CO₂ level than 1,000 ppm in the indoor air environment,
the more infection risk and adverse effect of CO₂ on health.
You can estimate these by using CAP-AI, respectively !

CK
CO2 ➡ Infection risk

  • CO₂(ppm)
  • Infecterperson
  • Non-Infecterperson
  • Occupiedperson
  • Body weightkg
  • Room size
  • Durationmin

Ventilation Vollum0ACH (times/ hr)

Infection Probability0%

Infection Risk

VK
Ventilation ➡ CO2 , Infection risk

  • VentilationACH(times/ hr.)
  • Infecterperson
  • Non-Infecterperson
  • Occupiedperson
  • Body weightkg
  • Room size
  • Durationmin

CO₂0ppm

Infection Probability0%

Infection Risk

SN
Ventilation ➡ Indoor air quality

  • VentilationACH(times/ hr.)
  • Occupiedperson
  • Body weightkg
  • Room size

CO₂1000ppm

Air quality