GCE Zen-O Portable Oxygen Concentrator Review

GCE Zen-O Portable Oxygen Concentrator Review

If you are looking for a portable oxygen concentrator that will cater to your needs wherever you go, you better read this GCE Zen-O Portable Oxygen Concentrator Review

All you need to know about it is in this article, as well as additional information that you surely don't want to miss. If you are ready, let's get to it!

Bottom Line Up Front

The GCE Zen-O portable oxygen concentrator is an amazing device that can deliver oxygen in both pulse flow and continuous flow.

It is effortless to use and has a large LCD screen that displays the current flow mode you are using, its battery life, and the output setting.

With such a compact size, you can travel with your GCE Zen-O anywhere without worrying about the inconvenience. You can regain your active and outgoing lifestyle with this great portable oxygen concentrator!

What You'll Like

Here are some of the advantages that you will find highly beneficial with GCE Zen-O:

  • Large LCD control and display screen
  • Dual flow technology: pulse flow and continuous flow
  • Audio and visual alarms that prompt the patient when an action is required
  • Easy to replace sieve beds

What You Won't

Even though the GCE Zen-O is an excellent portable oxygen concentrator, there are still some shortcomings you need to consider:

  • Heavier than other portable oxygen concentrators

Many portable oxygen concentrators out there weigh around 3 to 10 lbs or less, but this machine weighs 10.25 lbs. That is much heavier, which may not be ideal for some people like elderly oxygen patients. 

Aside from this, you will need to read the whole article to learn more!

What is GCE Zen-O?

The GCE Zen-O is an exceptional portable oxygen concentrator recommended by oxygen specialists. Its dual mode provides continuous oxygen and pulse flow settings in one compact device.

It uses advanced technology which adjusts the amount of oxygen delivery based on the patient's breathing rate. It may automatically increase the flow rate of the machine whenever the patient seems to need it the most, especially during walking and outdoor activities. 

Due to its size, you can bring your GCE Zen-O in a travel cart or a carrying case whenever you are out. This is perfect for respiratory patients who require supplemental oxygen, which they can get with a doctor's prescription.

It is also great for people with COPDCOVID, elders, and others with breathing issues and lung disease. If you are one of these individuals, this portable oxygen concentrator is the one for you.

How Does GCE Zen-O Work?

Zen-O portable oxygen concentrator delivers up to 2 liters of oxygen per minute to cater to the respiratory needs of the patients. Other devices may have a fixed amount of oxygen delivery, which is not convenient for people's different needs, but that is where the GCE Zen-O sets itself apart. 

Similar to an oxygen tank, it delivers oxygen to the patient using a nasal cannula. The Zen O POC takes the air around it, then filters that through its sieve beds to get high concentrated oxygen of up to 90%. It removes all the unnecessary gasses in the air, such as nitrogen, methane, carbon dioxide, and more. 

What makes portable oxygen concentrators more efficient than oxygen tanks and other forms of ventilation is that it doesn't require refilling ever. It always utilizes ambient air to provide continuous oxygen output, perfect for home and on-the-go oxygen therapy treatments.

GCE Zen-O Features

The GCE Zen-O has more to offer than a regular portable oxygen concentrator. To get to know it better, browse the features here and see what makes it an exceptional model to consider:


The Zen-O has a sleek and modern design that you will love. It doesn't look tacky at all, so you will be happy to bring it whenever you go.

The interface is straightforward to understand, even if you are a beginner for POCs. Of course, it still comes with a manual you can follow.

Size and Weight

As mentioned, this particular portable oxygen concentrator weighs relatively higher than other models out there. It weighs 10.25 lbs with 8.3" x 6.6" x 12.3" dimensions.

The weight may also differ depending on the battery that you are using. The 10 lbs only have a single battery, but it can become 11.45 pounds if you add an extra battery. Still, it is easy to transport and mainly safe to bring wherever.


Even though this model can be on the heavier side, it doesn't mean it is not portable anymore. A carrying case is included in every purchase of the GCE Zen-O, and you can use that to carry your POC around. You can get a travel cart if you do not like taking a 10-pound device around. It is a trolley specifically made to hold your Zen-O.

It is also small, so there would be little to no problem bringing it even in crowded spaces or a smile walking around your area. 

LCD Screen

One of the great features of the GCE Zen-O is its large LCD screen that displays the current setting of your POC, battery life, and output flow. That is where the buttons are also located, so you can easily manage the device based on your respiratory needs.

It also displays large texts, making it easy to navigate even for elderly patients. 


The controls of the Zen-O come in five (5) buttons: the power key, alarm mute key, mode key, and the two (2) flow setting selection keys. Unlike other models, they are much softer and easier to operate.

They are located at the top of the machine under the LCD screen. This is ideal because you won't have to raise the device when setting up the flow rate of your portable oxygen concentrator.


The GCE Zen-O features an alarm that alerts the user when the device requires action, like when the battery is low, no breath is detected, or it needs service. In addition to the sound alarm, the LCD also displays a visual warning for such situations.

This enables the user to respond immediately.


This device has two options available for the batteries: 1 or 2 batteries operation. 

Using one (1) battery on a pulse dose setting of 2 LPM allows the device to last up to 4 hours, while it only takes 45 minutes when it is on a 1.5 LPM continuous setting.

On the other hand, using a 12-cell battery can last up to 8 hours of constant usage on a pulse dose setting of 2 LPM, while 2 and a half hours on a 1.5 LPM continuous flow setting. 

Battery Life

For a better understanding of the battery life of the GCE Zen-O portable oxygen concentrator, you can refer to the guide below:

Pulse Flow Setting

Expected life on 1 Battery

Expected life on 2 Battery


4 hours

8 hours


4 hours

8 hours


3 hours

6 hours


2.15 hours

4.30 hours


2 hours

4 hours


1.45 hours

3.3 hours 

Continuous Flow Setting

Expected life on 1 Battery

Expected life on 2 Battery


3 hours

6 hours


1.45 hours

3.30 hours


1.15 hours

2.30 hours


0.45 hours

1.30 hours

Charging time

The GCE Zen-O recharge may take 3 to 4.5 hours, depending on the voltage and whether or not you are using it while connected to the power outlet.

Power Sources

The Zen-O has three (3) power sources: External extra batteries, an AC adaptor, and a DC adaptor. Similar to a stationary oxygen concentrator, you can use this machine safely while connected to an AC power source.

However, you can also plug it into cars, SUVs, trucks, and other forms of vehicle. This makes an ideal POC if you travel a lot. It is easy to charge, making it a perfect breathing partner in all places.

Power Consumption

The power consumption of the GCE Zen-O on a continuous flow oxygen setting of 2 LPM is at 133 Watts and 140 Watts while connected to a power source.

For the pulse dose setting of 2 LPM, it can consume up to 25 Watts and 70 Watts while it is recharging.

Flow Type

Most portable concentrators only feature one flow type, specifically the pulse dose, because the continuous setting requires a more powerful structure to work on.

The GCE Zen-O is different because it has a dual flow feature that makes the pulse dose and continuous flow accessible to the user.

The pulse dose is ideal for people who don't need as many breaths per minute, while the continuous flow oxygen output is ideal for those with constant respiratory issues which require more oxygen.

The number of liters per minute in this device is also adjustable, ranging from 1.0 to 6.0 flow rate in pulse dose mode and 0.5 to 2.0 in continuous flow mode. 

Finding a reliable portable oxygen concentrator that delivers the best of both worlds is difficult. You can seamlessly switch modes depending on your needs and what you are doing. 

Sieve Beds

The GCE Zen-O features replaceable sieve beds, making it easier to maintain the device even after hours of constant usage. The sieve beds are perhaps the most essential part of POCs because they filter the air to concentrate the oxygen before delivering it to the user.

However, it will require replacement after a certain period, and you can do that in under 5 minutes only.

Warm Up Time

You can expect the GCE Zen-O to warm up immediately for at least a minute or two after turning on the power control.

Oxygen Concentration

The oxygen concentration of the GCE Zen-O ranges from around 87% to 96% in all settings. 


The GCE Zen-O can deliver up to 2 liters per minute of oxygen in both the continuous and pulse dose flow setting. This is enough for people with mild to moderate respiratory problems. 

Sound Level

The sound level of the GCE Zen-O is only 38 dB(A). This is considered quiet, and you probably would not hear it most of the time, especially during day times. If you are going to use it at night on AC, it will not disturb your sleeping unless it detects irregularities in your breathing pattern and sets off an alarm on a pulse dose setting.


GCE Zen-O's filters are an essential component; you will need to replace them after a considerable amount of time to maintain the oxygen concentration it delivers.

Available Accessories

These are the available accessories for the GCE Zen-O:

  • Zen-O battery
  • Zen-O carry bag
  • Zen-O travel cart
  • DC adapter
  • Filter wrench
  • POC cannula filter (10 per pack)
  • Sieve bed assembly
  • External battery charger (US)
  • External battery charger (EU)
  • External battery charger (UK)
  • AC power supply (US cord)
  • AC power supply (EU cord)
  • AC power supply (US cord)
  • Accessories bag


The GCE Zen-O is FAA Approved, making it a good POC even if you travel a lot. You can bring it across the USA or on an international flight if you have all the requirements before boarding the plane.

International Approvals

The GCE Zen-O meets the standard of the Food and Drug Administration (FDA) in the US and European Medical Device Directive. It is also manufactured to high standards in the UK, making it a global-renowned portable oxygen concentrator. It is available in many locations worldwide, such as China, Latin America, India, the United States, and all across Europe.

On the other hand, the accessories and components of the GCE products are manufactured by their strategic partners in the Middle East and Africa. 


The maximum operating altitude of the Zen-O portable oxygen concentrator is up to 9,000 feet above sea level


Every purchase of the GCE Zen-O portable oxygen concentrator comes with a warranty of three (3) years or equivalent to 15,000 hours. This covers all defects in manufacturing and faulty components. 

Manufacturer Country

The manufacturing country of the GCE products, including the Zen-O, is Britain. GCE is a leading European gas-equipment company that manufactures all sorts of devices. 


GCE Zen-O's price at Sprylyfe is $2,995.

Available GCE Zen-O Discount

If you purchase the GCE Zen-O at Sprylyfe, we offer up to a 25% discount that you don't want to miss. We also have promo packages to help you save more for this portable oxygen concentrator. Call our team at (855) 205-0510 if you have additional questions. 

GCE Zen-O Alternatives

The GCE Zen-O is an undeniably excellent portable oxygen concentrator, but there are some areas where it may be inferior such as its heavier weight than most POCs. With that in mind, you can check out the following alternatives that you can check out as well:

1. Inogen One G4

The Inogen One G4 is a great portable oxygen concentrator for many reasons. At a weight of only 3.29 lbs, it can deliver a pulse flow setting of 1 to 3 LPM. It is a powerful device with such a small structure that it will be handy for your future adventures. 

You can quickly bring it around in a carrying case without the weight that will stop you from enjoying a walk around the neighborhood. This model is great for people who need respiratory therapy, so be sure to check this one out. 

Read our comprehensive product review of Inogen One G4 here.

2. GCE Zen O Lite

If you want a more similar product to the GCE Zen-O model, then you will love this GCE Zen O Lite. It is almost the same product but much smaller and more portable. It only weighs 5.5 lbs, which is relatively lighter than the Zen-O variant. 

This model features five (5) different flow settings adjustable from 1.0 to 5.0. Its battery can last up to 4 hours of constant usage and is still easy to navigate due to the LCD screen and straightforward control keys. 

Read our in-depth review of GCE Zen-O Lite portable oxygen concentrator.

3. CAIRE FreeStyle Comfort

The CAIRE FreeStyle Comfort is another great product to consider. This is specifically designed to be functional while still being portable. It only weighs 5 lbs and has a pulse dose setting from 1 to 5. It is also extremely quiet, with a sound level of only 43 dB(A). 

Most of the products manufactured by CAIRE are world-renowned, so rest assured that this product is an excellent alternative for the GCE Zen-O. 

Read our product review of the CAIRE Freestyle Comfort portable oxygen concentrator.

4. Philips Respironics SimplyGo 

Read our in-depth expert review of the Philips Respironics SimplyGo here.

Watch this video where we compared the GCE Zen-O and the Philips Respironics Simply GO side-by-side.

FAQs About GCE Zen-O Portable Oxygen Concentrator

Still undecided if this model is for you? Browse through these frequently asked questions to find answers to your queries:

Is Zen-O Portable Oxygen Concentrator continuous flow?

Yes. The GCE Zen-O features a dual flow mode setting, one of which is the continuous flow. This is great for oxygen therapy patients who require a constant flow rate, and the amount of oxygen output would not change even if the breathing pattern of the user changes. 

Does Zen-O Portable Oxygen Concentrator consume much electricity?

Like most portable oxygen concentrators, the GCE Zen-O only consumes around 400 running Watts, which is equivalent to the consumption of several small appliances around the home. This includes blenders, laptops, lamps, portable stereos, DVD players, and small televisions of up to 32".

Is Zen-O Portable Oxygen Concentrator good?

Yes. The Zen-O portable oxygen concentrator is an excellent product to consider if you plan to purchase your home oxygen therapy.

Aside from being conveniently portable and easy to use, it also provides many features you will surely benefit from. This is one of the best models to get you supplemental oxygen, much better than oxygen tanks that require refilling every week or so. 

4. Does Zen-O Portable Oxygen Concentrator make noise?

Yes, the Zen-O portable oxygen concentrator makes a noise. However, this is still considered quiet at a sound level of 38 dB.

This is similar to the noise level of a whisper 5 feet away or a quiet library. It will not disrupt your sleep if you plan to use it at night as a sleep apnea treatment.

Bring Back Your Active Lifestyle Today With GCE Zen-O

With the GCE Zen-O, you don't have to compromise on going out and enjoying your favorite activities again. This is designed to allow you to enjoy the beauty of life, even with your oxygen therapy. It also has exceptional features that make everyday life easier and more fun.

If you’re still not sure what device to choose, you can read our complete guide on how to select a portable oxygen concentrator.

If you’re interested in buying a GCE Zen-O concentrator of your own, you may call us at (800) 314-8225 or buy a GCE Zen-O online at Sprylyfe!

We will be happy to assist you anytime.

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Phil Kadow - January 8, 2023

Is this poc suitable for sleeping?

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