Start with the flow rate.
A 10-litre oxygen concentrator is not automatically “better” than a 5-litre machine. The right choice depends first on the continuous oxygen flow prescribed by your healthcare professional, then on practical factors such as power use, size, noise, servicing and your home setup.
What is the difference between a 5L and 10L oxygen concentrator?
The number refers to the machine’s maximum continuous oxygen flow in litres per minute (LPM). A 5L concentrator can provide flow up to approximately 5 LPM, while a 10L concentrator is designed to provide higher continuous flow, up to approximately 10 LPM depending on the model.
A higher-capacity concentrator does not mean every user should receive more oxygen. Your prescribed flow rate should determine the required capacity, and oxygen settings should not be increased without medical guidance.
- 5L machines suit prescribed flow requirements within their rated range
- 10L machines provide additional capacity for higher prescribed flow
- Both are typically stationary, mains-powered home oxygen machines
- Both can be designed for extended or continuous daily operation
- Machine specifications differ by brand and model
- Backup planning matters because home units require electricity
What do “5 litre” and “10 litre” actually mean?
Home oxygen concentrators draw in room air, remove much of the nitrogen and deliver concentrated oxygen through tubing or a nasal cannula. The LPM rating describes how much continuous flow the machine is designed to deliver at its outlet.
LPM is flow capacity
Litres per minute describes the volume of oxygen flow available from the machine. It does not describe the amount every person should use.
5L does not mean five litres at all times
A 5L model normally has an adjustable flow range up to its stated maximum. The user follows the prescribed setting within that range.
10L provides higher maximum capacity
A 10L machine is designed for users whose prescription requires more continuous flow than a 5L unit can provide.
Purity is a separate specification
Do not assume the higher-flow machine automatically produces “better” oxygen. Check the manufacturer-rated oxygen concentration across the relevant flow range.
5L vs 10L home oxygen concentrator
The most important difference is maximum continuous-flow capacity. The larger 10L class also tends to be physically heavier and can use more electricity because it is designed for a higher output.
| Feature | 5L home concentrator | 10L home concentrator |
|---|---|---|
| Maximum flow | Up to approximately 5 LPM, model dependent | Up to approximately 10 LPM, model dependent |
| Main use case | Prescribed oxygen requirements that fall within the machine’s lower-to-moderate flow range | Higher prescribed continuous-flow requirements that need more capacity |
| Physical size | Typically smaller and lighter | Typically larger and heavier |
| Electricity demand | Generally lower than comparable higher-output models | Generally higher because of the larger output capacity |
| Home mobility | Usually easier to wheel between rooms | Still wheeled, but usually heavier to move |
| Best starting point | Your prescribed LPM requirement, followed by purity, power, noise, service support and home setup | |
A 10L machine is not automatically the better machine
Think of 5L and 10L as capacity classes. The correct class is the one that can reliably provide the oxygen flow your healthcare professional has prescribed while fitting the practical needs of your home.
A 5L concentrator may be appropriate when…
- Your prescribed continuous flow is within the machine’s rated range.
- You prefer a smaller stationary unit that is easier to move around the home.
- Lower electricity demand is an important practical consideration.
- You do not require the additional flow capacity of a 10L machine.
A 10L concentrator may be appropriate when…
- Your healthcare professional has prescribed a higher continuous oxygen flow.
- A 5L concentrator cannot provide the required prescribed flow capacity.
- The larger footprint and higher power requirement can be accommodated at home.
- You need a machine specifically rated for higher-flow home or clinical support.
Your oxygen prescription should be reviewed by an appropriate healthcare professional. OxyMed can help with equipment specifications and product selection, but should not replace clinical guidance on oxygen dosage.
Compare a current 5L and 10L home oxygen concentrator
The Aerti AE-5-S and AE-10 show how moving from the 5L class to the 10L class changes more than the maximum flow rate. The higher-capacity machine is heavier and has a higher rated power requirement.
Aerti AE-5-S
Continuous-flow home oxygen concentrator with a 1–5 LPM adjustable range and built-in nebuliser.
- 1–5 LPM
- 93% ±3%
- 300 W
- 14.4 kg
- 24-hour use
Aerti AE-10
Higher-capacity continuous-flow home oxygen concentrator rated up to 10 LPM, with built-in respiratory support features.
- Up to 10 LPM
- 93% ±3%
- 610 W
- 24 kg
- 24-hour use
What happens during a power cut?
Stationary home oxygen concentrators depend on mains electricity. If the power supply stops, the concentrator will stop producing oxygen unless it is connected to a suitable backup power solution.
Backup equipment must be sized for the concentrator’s actual power requirement and start-up behaviour.
Consider how long backup support may need to run and how it will be recharged between outages.
Ask your healthcare provider and oxygen supplier about an appropriate continuity plan for interruptions.
Never change a prescribed flow rate to extend backup runtime without medical guidance.
How to choose between a 5L and 10L oxygen concentrator
Start with the prescription, then compare the practical details that affect everyday home use. This avoids paying for capacity you do not need or choosing a machine that cannot meet the required flow.
Confirm prescribed flow
Know the prescribed litres per minute and whether continuous flow is required.
Match capacity
Choose a machine whose rated flow range safely covers the prescription.
Check power & placement
Review wattage, ventilation space, room layout, machine size and movement between rooms.
Compare features
Look at oxygen monitoring, alarms, noise, nebuliser functions, warranty and included accessories.
Plan after-sales support
Consider filters, servicing, replacement parts, repairs and who you can contact if the machine alarms.
Three specifications worth comparing before you buy
Two machines with the same maximum LPM can still feel very different in daily use. Flow capacity is essential, but it should not be the only specification you compare.
Electricity consumption
- Check rated power
- Factor in backup-power planning
- Consider long daily operating periods
Noise, size & movement
- Bedroom or living-area placement
- Ventilation clearance
- Weight and castor-wheel movement
Service & parts
- Warranty and technical support
- Filters and consumables
- Local servicing and repair access
Need help matching a machine to your prescribed flow requirement?
Browse OxyMed’s current 5L and 10L home oxygen concentrators, compare technical specifications and speak to the team about product features, delivery, accessories and after-sales support.
5L vs 10L oxygen concentrator questions answered
What is the main difference between a 5L and 10L oxygen concentrator?
The main difference is maximum continuous-flow capacity. A 5L unit is designed to deliver up to about 5 litres per minute, while a 10L unit can provide a higher flow, up to about 10 litres per minute depending on the model.
Is a 10L oxygen concentrator better than a 5L?
Not automatically. A 10L machine offers higher flow capacity, but the appropriate machine is the one that matches the user’s prescribed oxygen requirement and practical home needs. A 5L machine may be entirely appropriate when the prescription falls within its rated range.
Can a 10L oxygen concentrator be used at a lower flow setting?
Many 10L concentrators have an adjustable flow range, but the usable range depends on the exact model. Always check the manufacturer specification and use only the flow prescribed by your healthcare professional.
Does a 10L oxygen concentrator use more electricity?
Higher-output machines generally require more power than comparable lower-output models. For example, OxyMed currently lists the Aerti AE-5-S at 300 W and the Aerti AE-10 at 610 W. Check the exact model’s rated power before planning backup electricity.
Can a home oxygen concentrator run 24 hours a day?
Some home oxygen concentrators are designed for 24-hour continuous operation. Both the Aerti AE-5-S and AE-10 are currently specified by OxyMed as suitable for 24-hour use. Follow the machine instructions, keep ventilation openings clear and observe recommended maintenance.
Will a home oxygen concentrator work during a power outage?
Not on mains power alone. Stationary oxygen concentrators require electricity and will stop operating when the power supply fails unless a suitable backup system is available. Discuss an appropriate backup plan with your oxygen supplier and healthcare provider.
How do I know which oxygen concentrator flow rate I need?
Your required oxygen flow should be prescribed by an appropriate healthcare professional. Once you know the prescription, OxyMed can help you compare machines whose specifications cover that requirement.
