What does this guide cover?
An oxygen concentrator is a device that concentrates oxygen from ambient air. Its types, liter value, who it is suitable for, and selection criteria.
An oxygen concentrator is an electrically powered medical device that draws in ambient air, separates out the nitrogen, and delivers highly concentrated oxygen to the user. Unlike an oxygen cylinder, it does not contain stored gas; an oxygen concentrator continues to produce oxygen from the air as long as it is running. Only a doctor can decide which user needs an oxygen concentrator and how many liters per minute of flow are required.
How does an oxygen concentrator work?
The device draws in ambient air with a compressor and typically passes it through sieve beds containing zeolite. In this process, most of the nitrogen is captured, leaving high-concentration oxygen, which is delivered to the user via a nasal cannula or mask. Because the process is continuous, the device has an advantage in terms of consistency over systems that require refilling.
Home-type and portable oxygen concentrator types
Home-type models are designed for stationary use, can offer higher flow values, and require a constant power supply. A portable oxygen concentrator (POC), on the other hand, runs on battery, is lighter, and is suitable for use while on the move; however, its flow capacity is generally more limited. Whether the user will use it at home or outdoors determines this choice.
What does the liter/minute value mean?
The liter/minute (LPM) value indicated on the device shows the oxygen flow it can deliver. The required flow value is specific to the individual and is determined by the doctor; a low-capacity device may be insufficient for a user who needs a higher liter flow. For this reason, it is important to know the flow value recommended by the doctor before making a selection.
What to look for when choosing an oxygen concentrator?
Flow capacity, oxygen purity level, noise level, energy consumption, device weight, alarm systems and service/warranty support are the key criteria. For long-term use, quiet operation and low energy consumption provide comfort, while an authorized service network makes it easier to get support throughout the device's lifetime.
Who is it not suitable for, and what should be considered?
An oxygen concentrator should not be used without a doctor's recommendation; whether it is suitable for a person's condition requires medical evaluation. Since the device accelerates combustion, it must be kept away from open flames and heat sources. In areas with frequent power outages, planning a backup solution is recommended.
Symptoms to watch for when using an oxygen concentrator
If a person using an oxygen concentrator experiences symptoms such as increased shortness of breath, discoloration of the lips or nails, or unusual fatigue, a doctor should be consulted. Even if the device's flow value is set correctly, changes in the person's condition require medical evaluation. An oxygen concentrator is a treatment support device; monitoring of symptoms should be done together with healthcare personnel.
Practical tips for choosing a home-type oxygen concentrator
When choosing a home-type oxygen concentrator, evaluate in advance the ventilation of the room where the device will be located, the position of the power outlet, and the noise level. If it will be used at night, quiet models provide comfort. Also, keeping a spare cannula, extension tubing and a spare outer filter on hand makes it easier to maintain continuity of use.
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Oxygen concentrator guide series
- What is an oxygen concentrator? (this page)
- Factors affecting price
- Cylinder or concentrator?
- How is it used?
- Filter cleaning and maintenance
Frequently asked questions
Is an oxygen concentrator obtained by prescription?
The doctor decides on the necessity of the device and the flow value. Always base your purchase or rental decision on the doctor's guidance.
Should I choose a home-type or portable model?
For stationary, long-term use, a home-type model stands out; for use while on the move, a portable oxygen concentrator is preferable.
How many liters does the device need to be?
The liter/minute requirement is specific to the individual and is determined by the doctor; the device should be chosen with a capacity that meets this value.
Is an oxygen concentrator more advantageous than a cylinder?
Since a concentrator produces continuously from the air, it eliminates the need for cylinder refilling; however, it depends on electricity.
Does the device need to run continuously?
The duration of use is specific to the individual and is determined by the doctor; for continuous use, service intervals should also be taken into account.
Prepared by: Medikal Firma content team · Updated: 17.06.2026 · Information is compiled based on general usage guides and manufacturer instructions.
This content is for general informational purposes only and does not replace medical advice. Always consult your doctor or the relevant healthcare personnel regarding device or product use, settings and treatment decisions.
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