How Oxygen Concentrators Work
Oxygen concentrators are medical devices designed to provide oxygen therapy by extracting oxygen from the surrounding air and delivering it in a concentrated form to the user.
Unlike oxygen tanks, they do not store oxygen. Instead, they continuously process air to provide a steady supply of oxygen.
What You’ll Learn
How oxygen concentrators function
The basic steps inside the machine
Why nitrogen is removed
How oxygen is delivered to the user
The Basic Process
Oxygen concentrators work through a simple but highly effective process:
Air Intake
The machine pulls in surrounding air from the environment.
Filtration
The air passes through filters that remove dust and particles.
Nitrogen Separation
The device removes nitrogen, which makes up most of the air we breathe.
Oxygen Delivery
The remaining concentrated oxygen is delivered through a nasal cannula.

Why Oxygen Needs to Be Concentrated
Air naturally contains:
- 21% oxygen
- 78% nitrogen
Oxygen concentrators increase the oxygen percentage by removing nitrogen, making it suitable for therapeutic use.
Continuous Operation
Oxygen concentrators run continuously while powered on. This ensures:
- A steady oxygen supply
- No need for refilling tanks
- Reliable long-term use
Pulse Flow vs Continuous Flow
Some concentrators deliver oxygen differently:
- Pulse Flow: delivers oxygen when you inhale
- Continuous Flow: delivers oxygen constantly
Why Oxygen Concentrators Are Used
They are commonly used because they:
- Provide consistent oxygen delivery
- Do not require refills
- Are suitable for long-term oxygen therapy
- Offer more mobility than traditional tanks
Where They Are Used
Oxygen concentrators can be used:
- At home
- While traveling (with portable units)
- In clinical or care settings
Maintenance Basics
To keep a concentrator working properly:
- Clean or replace filters regularly
- Keep air intake vents clear
- Follow manufacturer maintenance guidelines
Frequently Asked Questions
Do oxygen concentrators store oxygen?
No, they generate oxygen from ambient air.
How long can you use an oxygen concentrator?
They are designed for continuous, long-term use.
Are portable oxygen concentrators different from home units?
Yes, portable units are designed for mobility, while home units are typically larger and more powerful.
Need Help Choosing the Right Oxygen Machine?
Choosing the right oxygen concentrator can feel overwhelming, but you don’t have to make the decision alone.
Call our team today and we’ll help you find the best option based on your needs, lifestyle, and oxygen requirements.
Related Guides
Portable Oxygen Concentrators: Complete Guide
Pulse Flow vs Continuous Flow Explained
How to Choose the Right Oxygen Machine
Oxygen Therapy at Home Guide