Summary of Oxygen Concentrator Liter Flows

The oxygen provided by home and portable concentrators is measured in LPM (liters per minute) for continuous flow, or the equivalent thereof in ml/min (milliliters per minute) in pulse dose oxygen. If you require oxygen therapy, your doctor will prescribe you a given oxygen flow rate such as 2 liters per minute. An oxygen flow rate of 2 LPM means the patient will have 2 liters of oxygen flowing into their nostrils over a period of 1 minute. Oxygen prescriptions generally run from 1 liter per minute to 10 liters per minute with 70% of those patients being prescribed 2 liters or less.

Continuous flow oxygen always flows from the cannula and never stops until the unit is turned off. Pulse dose oxygen is released in puffs of air, often referred to as a "bollus". Many portable models only have pulse dose settings, while some also offer continuous flow in lower settings.

Below is a summary of various liter flows for home and portable oxygen machines.

Portable Oxygen Concentrator Liter Flows

3 Liter/LPM Portable Oxygen Concentrators

The AirSep Focus and AirSep Freestyle are two very small yet powerful portable oxygen concentrators. Even though they're very small, they can put out up to the equivalent of 3 LPM of pulse dose oxygen. They are also ideal for those who need oxygen therapy while exercising, and those who do a lot of traveling.

4 Liter/LPM Portable Oxygen Concentrators

The Inogen One G3 and the Lifechoice Activox by Inova Labs are two more portable oxygen concentrators in the more lightweight category. Since they are a little bigger than the models previously mentioned, they are capable of having a higher oxygen output.

5 Liter/LPM Portable Oxygen Concentrators

The larger and slightly heavier models, The Inogen One G2, AirSep Freestle 5 and Invacare XPO2, have a maximum output of the equivalent of 5 LPM. The Freestyle 5 is a great portable concentrator, because it still manages to stay small while still delivering this amount in the pulse dose equivalent.

Educate yourself with our Free Oxygen Therapy Guide

6 Liter/LPM Portable Oxygen Concentrators

These larger portable models have a total maximum capacity of 6 LPM (equivalent) – The Respironics EverGo and SimplyGo (pulse dose only), Sequal Eclipse, and the Igo by DeVilbiss. The Eclipse, for example, is one of the portable models that also features continuous flow settings up to 3 LPM. They also feature a high purity rate.

Home Oxygen Concentrator Liter Flows

2 Liter/LPM Home Oxygen Concentrators

Our one 2 LPM stationary oxygen concentrator, is the Respironics SimplyFlo. It only has two settings, 1 LPM and 2 LPM, but if this is all you need for a few hours daily or overnight, you can enjoy the small size and light weight of this concentrator, which weighs less than 9 lbs.

5 Liter/LPM Home Oxygen Concentrators

With the 5 LPM stationary oxygen concentrators, the Respironics EverFlo, Invacare Perfecto, and AirSep Visionaire, we're getting into the larger and heavier stationary oxygen concentrators that can only be used at home, while plugged into an AC power source. These are the concentrators necessary for those who need a higher dose of oxygen.

10 Liter/LPM Home Oxygen Concentrators

Sometimes it's necessary for a patient to receive anywhere from 5 LPM to 10 LPM of oxygen therapy, and that's where the AirSep Intensity 10, The Respironics Millenium 10, and the Invacare Platinum 10 come in. These powerful stationary models often offer other features, such as the ability to run a nebulizer as well.

20 thoughts on “Summary of Oxygen Concentrator Liter Flows”

  • Jonathan A. Hines
    Jonathan A. Hines May 11, 2017 at 3:47 pm

    My wife is at end stage copd. She needs between 5 and 8 liters of oxygen depending on her activity. Do they offer machines that produce more than 10 liters ? That is as high as her machine will go.

    Reply
    • Danielle Jason
      Danielle Jason May 16, 2017 at 5:58 am

      Unfortunately, we do not offer any units that produce more than 10 liters however, there is a possible solution. We can tether 2 concentrators together to produce the higher flow that your wife requires. If you'll give our Oxygen Specialists a call at 877-774-9271 they'll be able to work with you to find a solution.

      Reply
  • tsubasa ozora

    My grandmother needs 6-7 ltrs oxygen so we've merged two months concentrators together At what setting does the airsep visionaire concentrator give max O2 output %? Is it 3ltr, 3.5ltr or 4ltr?

    Reply
    • Danielle Jason

      Thank you for your comment. If you'll give our Customer Service Department a call at 877-303-9289, they'll be able to work with you to better understand concentrator tethering.

      Reply
  • Barry Drske

    Hi. I have an InogenOne G3 and have been told by a friend in the UK that the highest setting gives only 2Lpm. Is that true? On an American site it says 1050ml. What is that equivalent too?
    Regards
    Barry Drake

    Reply
    • Danielle Jason

      Great question, Barry. The Inogen One G3 manual indicates that it delivers roughly 14ml per bolus per flow setting at 15 breaths per minute so approximately 210ml/min per flow setting. Depending on your model, if the settings go up to a flow setting of 5, it can deliver upwards of 1050ml.If you'd like to know more about the specifications and specifics of the machine, feel free to view the online user manual here: https://www.oxygenconcentratorstore.com/manuals/portable/inogenoneg3/Inogen_G3_User_Manual.pdf

      Reply
      • john vasey

        In order to help a confused rather simple non technical person can you please say if 3lpm equivalent is possible from inogen one g3 yes or no?
        with thanks JV

        Reply
        • Margaret Goodman
          Margaret Goodman March 30, 2018 at 4:55 am

          Thank you for your inquiry, John. I have passed along your information to a specialist who will reach out regarding your request. For more immediate assistance feel free to give our specialists a call at 888-360-9628 or if you prefer email [email protected]

          Reply
  • MASiddiqui

    I am prescribed 4LPM (continuous) at what setting should I set respironics simplygo so that the pulse setting will be equivalent to 4LPM continuous.

    Reply
    • Danielle Jason

      Thank you for your question, MASiddiqui. The Respironics SimplyGo can only perform up to 2LPM on the continuous flow setting. You will not be able to achieve 4LPM with your machine's continuous flow.

      Reply
  • Jacky

    How do you no how many liters to run my wife's o2 at night goes from low 80s to 99 while sleeping

    Reply
    • Danielle Jason

      That is something your doctor would have provided you when you received your prescription. Your prescription will indicate how much oxygen you require.

      Reply
  • kinley

    is it possible to have 15lpm oxygen concentrator.

    Reply
    • Danielle Jason
      Danielle Jason March 1, 2018 at 1:36 am

      Thank you for your inquiry, Kinley. We do not curretly offer any concentrators that produce 15 LPM of oxygen, however, it is possible to tether two concentators together in order to produce the high level of oxygen you require.

      Reply
  • Lacy

    I have someone that needs continuous flow oxygen. She is currently at 2 liters continuous. She must stay on continuous as the conserving devices do not keep her oxygen saturations high enough. Do you have a machine that would support her oxygen need but that is light enough to carry?

    Reply
    • Margaret Goodman
      Margaret Goodman March 7, 2018 at 6:13 am

      Thank you for your inquiry, Lacy. I have passed along your information to a specialist who will reach out regarding your request. For more immediate assistance feel free to give our specialists a call at 888-360-9628 or if you prefer email [email protected]

      Reply
    • Gerald Miller

      The 4 luggable pocs may have a setting that is equal to a LPM setting, the rest of them and almost all the conservers do not. Get one that goes at least 2 settings above the highest setting you may want to use. you will need to go between 1.5 to 3 poc settengs above what you need in Liters Per Minute. Encourage the Food and Drug Administration to begin regulating poc settings and make them equal to LPM.

      Reply
  • Alana Forsyth
    Alana Forsyth April 2, 2018 at 4:46 am

    Can you create a chart that shows what bolus equals what LPM?

    Reply
    • Margaret Goodman
      Margaret Goodman April 2, 2018 at 6:57 am

      Unfortunately, bolus size does not directly relate to LPM. Here is a little background information that may be helpful.

      Bolus size (in oxygen lingo) refers to the size of the “puff” of oxygen delivered to a
      patient via a pulse delivery system. Most pulse delivery machines provide between 12 - 30
      “puffs” in a minute based upon the setting. The higher the setting, the larger the bolus size and the fewer of them delivered per minute.

      Liters per minute (or LPM) on the other hand, refers to the flow rate of continuously flowing oxygen via a continuous (or traditional) oxygen delivery system. Many people are familiar with the terminology of 2 or 3 LPM flow.

      The relationship between the two is as follows: Pulse delivery systems have settings (typically
      1-2-3 etc) which ROUGHLY correlate to the amount of oxygen a patient on a continuous flow machine using continuous flow would require. For example, if a patient typically uses 2LPM on a continuous flow machine, MOST doctors would recommend a patient start with a setting of 2 on the pulse delivery machine. It is very important to note that a setting of 2 on a pulse delivery machine DOES NOT mean
      2 LPM is flowing (or even available from the machine) and that actual settings are both patient and disease dependent.

      Although bolus size is machine dependent (i.e. different machines have different bolus sizes),
      all manufacturers are consistent in that the bolus size INCREASES with the setting (i.e a setting of 2 has a larger bolus than a setting of 1).

      If you have specific questions, feel free to contact one of our oxygen experts or customer support for additional information.

      Reply

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