Respiratory Equipment for Astronauts: Breathing in Space


Astronauts embark on extraordinary journeys beyond Earth’s atmosphere, where the absence of breathable air presents unique respiratory challenges. Proper respiratory equipment is not only vital for their survival but also essential for the success of space missions. This guide explores the respiratory equipment used by astronauts to breathe and thrive in the vacuum of space.

The Space Environment

In space, there is no atmospheric oxygen, and the harsh conditions of vacuum require astronauts to rely on advanced technology for life support, including respiratory ventilator.

Essential Respiratory Equipment for Astronauts

1. Space Suit Helmet and Visor

The space suit helmet contains a ventilation system that provides astronauts with a controlled and breathable environment. It ensures a continuous supply of oxygen while preventing exposure to the vacuum of space. The visor protects their eyes from harmful solar radiation and micrometeoroids.

2. Primary Life Support System (PLSS)

The PLSS is a backpack-like device worn on the back of the space suit. It contains a variety of essential components, including:

  • Oxygen Supply: Tanks within the PLSS provide a continuous flow of oxygen for astronauts to breathe during spacewalks or while inside spacecraft.
  • CO2 Removal: The PLSS includes a system for removing exhaled carbon dioxide, ensuring a constant supply of oxygen for breathing.
  • Temperature Control: It regulates the temperature within the space suit to protect astronauts from extreme heat or cold.
  • Communication: The PLSS features a communication system, allowing astronauts to stay in contact with mission control and other crew members.

3. Environmental Control and Life Support System (ECLSS)

Inside spacecraft, astronauts rely on the ECLSS to maintain a breathable atmosphere. It consists of several key elements:

  • Oxygen Generation: Some spacecraft are equipped with systems that can generate oxygen from water through electrolysis, ensuring a renewable oxygen supply.
  • Carbon Dioxide Removal: The ECLSS includes devices that remove carbon dioxide from the spacecraft’s air supply, preventing dangerous levels of CO2.

4. Portable Breathing Apparatus

During extravehicular activities (spacewalks), astronauts carry a portable breathing apparatus, similar to SCUBA gear, in case of an emergency. This device provides an independent oxygen supply and communication capabilities.

5. Exercise Equipment

Regular exercise is crucial for maintaining astronauts’ respiratory health in the microgravity environment of space. Treadmills and stationary bikes are equipped with harnesses to keep astronauts securely in place while they work out, helping to preserve lung function.

Training and Maintenance

Astronauts undergo extensive training to operate and troubleshoot respiratory equipment, as well as to respond to emergencies. Regular maintenance and system checks are performed on all equipment to ensure their reliability in the unforgiving environment of space.


Respiratory equipment for astronauts is a lifeline in the harsh environment of space, allowing them to breathe, communicate, and perform critical tasks while conducting missions beyond Earth’s atmosphere. These advanced technologies demonstrate the remarkable capabilities of human innovation and engineering, enabling humans to explore and thrive in the final frontier.

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