Underground shelters and bunkers

The major pollutant in our living premises is carbon dioxide which people produce while breathing. An average human exhales around 1 kg of carbon dioxide (CO2) per day. In a sealed environment such as underground shelters and bunkers or in the safe rooms the most dangerous thing is not the lack of oxygen, but the build of carbon dioxide up to lethal levels. This is the reason why controlling carbon dioxide (CO2) levels in the air of underground shelters and bunkers or in a safe room by using carbon dioxide air scrubbers is crucial.

Equipping underground shelters and bunkers with a carbon dioxide scrubber is a good investment as after the first hours of a nuclear attack, smoke, carbon monoxide as well as radiation particles could overpower the ventilation and filtration systems. By using a proper portable carbon dioxide air scrubber people may stay without ventilation for several days in the underground shelters and bunkers or in a safe room.

Ventilation air blowers should not be switched on to bring in fresh air in case of ground fires. In this situation people in the shelters have to breath the sealed atmosphere air inside the shelter.

Tightly sealed unventilated safe rooms or underground bunkers and shelters cannot be used for a long period without the risk of lethally high carbon dioxide levels if they are not fitted with carbon dioxide scrubbers.

In case there is need to take in more people into the underground shelter and bunker than it can accommodate, a carbon dioxide scrubber is essential.

The safely sustainable time in the same sealed shelter for different number of adults is shown below.

Safe hours in the shelter

Some companies offering underground shelters, bunkers and ventilation for shelters claim that carbon dioxide levels in their bunkers and shelters are safe. However if the carbon dioxide (CO2) level rises up to 1% inside the shelter, it becomes life threatening for people and especially for children, elderly and people in generally poor health, for asthmatics and people suffering from cardiovascular diseases.

By using a carbon dioxide scrubber the level of carbon dioxide may be kept well below 0,1% (1000ppm) in the underground shelters and bunkers, the same amount as in a well ventilated room.

The Alfaintek Carbon Dioxide Scrubbers have special charcoal filters that purify the indoor air from dust, smells, particles and VOC. They consume little power and can be run on batteries in case of a power cut.

With the Alfaintek Carbon Dioxide Scrubber people do not have to suffer from poor air quality inside the shelter and safe room at all!

Learn more about carbon dioxide (CO2) in Publications by clicking here.