Oxygen (O₂) and Air Supply Systems for Shelters: Compressed Air, Overpressure Control and Emergency Oxygen Generation
Introduction
Maintaining suitable atmospheric conditions is an important part of operating shelters designed to remain isolated from the external environment. According to Atmas Group, shelters operating in complete isolation mode (“lock-up mode”) for extended periods require air-regeneration systems to help maintain safe levels of carbon dioxide (CO₂) and oxygen (O₂), as well as positive internal pressure.
Atmas Group offers oxygen and air supply solutions, alongside systems for monitoring and controlling safe gas levels. Positive pressure inside a protected shelter helps prevent contaminated air from entering the internal space.
These solutions are intended for shelters, emergency chambers and other isolated areas where the supply and management of air are important to the operating environment.
Official source: Oxygen (O₂) & Air Supply Systems — Atmas Group
Compressed Air and Overpressure Systems
Compressed air and overpressure systems are designed to help maintain oxygen levels and positive pressure in shelters and chambers isolated from the external air supply.
According to Atmas Group, these systems commonly use compressed air stored in dedicated tanks. The release of compressed air can be controlled manually or automatically with the use of sensors.
The page identifies two principal functions:
Oxygen-level management: supporting the maintenance of appropriate oxygen levels within the isolated shelter or chamber.
Overpressure maintenance: helping maintain positive internal pressure in the protected space.
The control arrangement may be manual or sensor-based and automatic, depending on the system configuration. The source does not specify universal operating pressures, tank capacities, oxygen concentrations, sensor models or response times, so these values should be established from the requirements of the particular installation rather than assumed.
For more information, visit the official Atmas Group Oxygen and Air Supply Systems page.
Oxygen Candles — Emergency O₂ Generators
Atmas Group also presents oxygen candles as an emergency means of generating oxygen inside a shelter. Unlike the compressed-air systems described above, these devices release oxygen through a chemical reaction.
The source explains that oxygen candles typically use a mixture of sodium chlorate and iron powder. When ignited, the chemical mixture releases breathable oxygen.
The page identifies similar products as being commonly used for emergency air supply in:
Civil defence shelters;
Rescue chambers;
Submarines;
Aircraft;
Other applications requiring emergency oxygen supply.
Oxygen candles are presented as an emergency oxygen-generation option. The source does not provide specific output rates, operating durations, activation procedures, storage requirements or model-specific performance figures. These details should therefore be confirmed against the documentation for the selected equipment.
Official source: Oxygen Candles — Emergency O₂ Generators
Air Supply and Atmospheric Management in Isolated Shelters
Oxygen supply is one component of a broader air-management approach. Atmas Group describes systems intended to help maintain safe levels of CO₂ and O₂ and preserve positive pressure inside shelters operating in isolation.
The company’s wider shelter filtration and ventilation portfolio also includes CO₂ and CO removal systems, air filtration and ventilation equipment, overpressure-maintenance systems, gas detection and air-quality monitoring solutions.
These systems address different functions within a protected environment. The precise combination required depends on the shelter design, operating conditions and technical requirements of the installation.
Explore the related official resources:
Shelter Filtration & Ventilation Solutions — overview of Atmas Group’s air-management and filtration solutions.
Oxygen (O₂) & Air Supply Systems — compressed-air and overpressure systems, and emergency oxygen generators.
Atmas Group — Official Website — company information and protective-technology solutions.
Selecting a Suitable Solution
The two technologies described by Atmas Group serve different purposes:
Feature | Compressed Air & Overpressure Systems | Oxygen Candles — Emergency O₂ Generators |
Main purpose described | Maintaining oxygen levels and overpressure in isolated shelters and chambers | Emergency oxygen generation inside a shelter |
Operating principle | Release of compressed air stored in dedicated tanks | Chemical reaction that releases oxygen when ignited |
Control or activation described | Manual control or automatic control using sensors | Ignition of the chemical mixture |
Applications mentioned | Shelters and chambers isolated from external air supply | Shelters, rescue chambers, submarines and aircraft |
This comparison reflects the information published on the Atmas Group website. It does not establish that the two technologies are interchangeable or that either solution is suitable for every installation.
Equipment selection and system integration should be based on the requirements of the specific protected facility and the manufacturer's technical documentation.
Conclusion
Oxygen and air supply systems are important components of the atmospheric-management infrastructure used in isolated shelters. Atmas Group describes two relevant approaches: compressed-air systems designed to support oxygen-level and overpressure management, and oxygen candles intended for emergency oxygen generation.
The appropriate solution depends on the intended application and the technical requirements of the protected space. For detailed information about the available options, consult the official Atmas Group resources or contact the company directly.
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