Staying in a closed room with no air circulation can be extremely dangerous and potentially life-threatening. The time a person can survive in such conditions depends on several factors, including the size of the room, the number of occupants, the level of activity, the initial air quality, and the available oxygen supply.
In a room with no air circulation, oxygen levels will decrease, and carbon dioxide levels will rise as occupants consume oxygen and produce carbon dioxide through respiration. If the oxygen levels drop significantly below the normal atmospheric level of around 21%, it can lead to hypoxia (oxygen deficiency) and cause various symptoms such as dizziness, shortness of breath, confusion, rapid heart rate, and, in severe cases, loss of consciousness and organ failure.
The time it takes for oxygen levels to become dangerously low and carbon dioxide levels to rise to hazardous levels can vary depending on the factors mentioned above. In small, airtight spaces with a limited number of occupants, these changes can occur more rapidly compared to larger spaces with fewer people.
It's essential to avoid such situations altogether. If you find yourself in a closed room with no air circulation, it's crucial to take immediate action to open windows, doors, or vents to allow fresh air to enter. If the situation cannot be resolved quickly, it's essential to contact emergency services for assistance.
In summary, staying in a closed room with no air circulation is extremely risky, and it's vital to ensure adequate ventilation and access to fresh air to maintain a safe environment for all occupants.