Inogen One G2 vs G3: Comparing Portable Oxygen Concentrators

When it comes to portable oxygen concentrators, adapting to the user’s lifestyle while providing the necessary oxygen therapy is key. Inogen, a company recognized for its innovations in oxygen therapy, offers a range of portable oxygen concentrators, including the Inogen One G2 and the Inogen One G3 models. These devices are engineered to provide oxygen to patients with respiratory conditions, allowing for greater mobility and independence.

The Inogen One G2 and G3 sit side by side, showcasing their sleek, compact designs and advanced technology

The G2 and G3 models are particularly noted for their portability. The Inogen One G2, the older of the two, has a higher pulse dose capacity of up to setting 5, making it suitable for users requiring a more extensive range of oxygen delivery. The Inogen One G3, on the other hand, is lighter and more compact, offering up to pulse setting 4. It is the smaller of the two, although it produces a slightly louder noise when purging non-oxygenated air. Deciding between these two models involves a careful trade-off between the higher pulse dose settings offered by the G2 and the improved portability of the G3.

Key Takeaways

  • The Inogen One G3 is designed for enhanced portability and ease of use, while the G2 offers a higher pulse dose setting.
  • Both the G2 and G3 models facilitate mobility for users requiring oxygen therapy, with distinct features catering to different needs.
  • When choosing between the Inogen One G2 and G3, considerations include oxygen dose requirements, size and weight preferences, and noise sensitivity.

Comparing Inogen One G2 and G3

Two Inogen One portable oxygen concentrators side by side, labeled G2 and G3. G3 slightly smaller with updated design features

In this section, we focus on the distinctions between the Inogen One G2 and G3 models in terms of their design, portability, and power options, which are crucial for users relying on portable oxygen.

Design and Dimensions

The Inogen One G2 and the Inogen One G3 have been designed with portability in mind. However, the G3 stands out as the smaller unit. It measures less in volume and is the more compact of the two models. Specifically, the G2 has a bulkier profile than the G3, making the latter an advancement in reducing size without sacrificing oxygen delivery.

  • Weight:

    • G2: 7.25 pounds (with 12-cell battery)
    • G3: 5 pounds (with 8-cell battery)
  • Dimensions:

    • G2: Larger than the G3, exact dimensions unspecified
    • G3: Smallest in the series, exact dimensions unspecified

Portability Features

Both models are equipped for travel, coming with a carry bag and being FAA approved, which means they can be used on airplanes. Despite both being portable, the G3’s lighter weight and smaller size give it a slight edge in terms of travel convenience. Users can move around more freely with the G3, thanks to its minimal heft and space requirement.

Battery and Power Options

The battery life and power options for these portable oxygen concentrators are paramount for users who are often on the move. The G2 and G3 offer different battery size options and battery life.

  • Battery Options:

    • G2: Can use a larger 16-cell battery for extended use.
    • G3: Typically uses an 8-cell battery but has options for different sizes.
  • Battery Life:

    • G2: Up to 10 hours with 16-cell battery (varies with flow setting)
    • G3: Up to 4.7 hours with 8-cell battery (varies with flow setting)

Both units can be charged using AC power or DC power, and an external battery charger is available, which can recharge batteries separately from the concentrator. The G3’s batteries are lighter which complements its overall portability. The G2, on the other hand, while heavier, offers a longer battery life with the larger battery option, making it potentially more suitable for users who need longer periods of oxygen therapy while away from power sources.

Performance Specifications

The Inogen One G2 and G3 are displayed side by side, with clear labels highlighting their performance specifications

In this section, we compare the performance characteristics of the Inogen One G2 and G3 portable oxygen concentrators, focusing on oxygen delivery and operation and maintenance.

Oxygen Delivery

Inogen One G2:

  • Pulse Dose: Offers settings from 1 to 6
  • Oxygen Concentration: Varies between 87% to 96% at all settings
  • Pulse Flow Setting: Provides up to 10.5 mL per breath at setting 1 and adjusts with Intelligent Delivery Technology

Inogen One G3:

  • Pulse Dose: Offers settings from 1 to 5
  • Oxygen Concentration: Consistent at 87% to 95.6% across all settings
  • Pulse Flow Setting: Delivers a maximum of 1050 mL of oxygen per minute at setting 5

Operation and Maintenance

Noise Level:

  • Inogen One G2: Known for a quieter operation
  • Inogen One G3: Emits a noticeable purging sound during the exhaust of non-oxygenated air


  • With Intelligent Delivery Technology, both the G2 and G3 adjust the oxygen delivery to the user’s breathing rate.


  • Regular maintenance is minimal, involving filter cleaning and replacing as needed. Both units are designed for easy access to user-serviceable parts.

Usability and Functionality

The Inogen One G2 and G3 are compared side by side, showcasing their usability and functionality in a sleek and modern design

In choosing between the Inogen One G2 and G3, the decision often boils down to their usability and functionality for an individual’s lifestyle and oxygen needs.

Ease of Use

Both Inogen One G2 and G3 are designed to be user-friendly with clear LCD Displays and an intuitive Control Panel. The G2 and G3 offer flexibility with multiple pulse settings—the G2 going up to 6 and the G3 to 4—providing users with a range of oxygen delivery options. The settings can be easily adjusted to accommodate the user’s oxygen requirements during various activities throughout the day.

Travel and Mobility

Traveling with oxygen is more convenient with the lightweight and compact design of the Inogen One G3, which weighs around 5 pounds. In contrast, the G2 is a bit heavier at 7.25 pounds with a 12-cell battery. Both units have been approved for Airline Travel and come with a carry bag. Additionally, their respective batteries facilitate movement without constant reliance on a power source. The G2 typically offers a larger battery, which could be a factor for those needing longer use without recharging. Both can be utilized with a nasal cannula, offering freedom for users on the go.

Accessories and Additional Options

The Inogen One G2 and G3 are displayed side by side, showcasing their various accessories and additional options. The G2 features a smaller size and simpler design, while the G3 boasts a sleeker look and more advanced features

For users of the Inogen One G2 and G3, enhancing the portability and convenience of their oxygen concentrators is key. This section outlines the range of accessories and power options designed to complement the active lifestyles of oxygen therapy patients.

Available Accessories

The Inogen One G2 and G3 models come equipped with a selection of accessories aimed at improving user experience. Notable amongst these are:

  • Carry Bag: A custom bag designed for easy transport, providing a combination of style and functionality.
  • Cannula: An essential accessory for delivering oxygen from the concentrator to the user.
  • Cart: The G2 model includes a wheeled cart to facilitate movement without lifting the unit.

Additional accessories for both models may include:

  • Extra batteries
  • External battery chargers
  • Replacement parts such as filters

Power Sources and Charging

Both Inogen One models offer various power sources and charging options to ensure continuous oxygen supply.

Batteries and Battery Options:

ModelBattery TypeBattery Life
G212-cellUp to 4 hours
G224-cellUp to 8 hours
G38-cellUp to 4 hours
G316-cellUp to 8 hours

Charging Systems:

  • AC Power Supply: Allows for charging through any standard electrical outlet.
  • DC Adapter: Facilitates charging in a vehicle, useful during travel.

Both concentrators can be used while charging, ensuring no interruption in therapy when near a power source.

Health and Lifestyle Impact

A person using Inogen One G2 and G3, feeling more active and healthy with G3

Inogen One G2 and G3 portability options significantly influence the daily life of oxygen users, offering freedom from heavy oxygen tanks and supporting those with respiratory conditions such as COPD, asthma, and other lung diseases. These devices cater to the varying needs of oxygen-dependent patients, focusing on independence and convenience.

Quality of Life Enhancement

The Inogen One G2 and G3 portable oxygen concentrators are designed with the user’s quality of life in mind. Independence is a critical consideration for oxygen therapy users, and these devices facilitate an active lifestyle. Unlike traditional heavy oxygen tanks, both the G2 and G3 models are lightweight and come with various battery options, making them much easier to carry around.

  • Inogen One G2: With options including a wheeled cart, patients gain the ability to move more freely.
  • Inogen One G3: At under 5 pounds and FAA approved for air travel, it ensures patients maintain a high mobility level.

Respiratory Conditions Support

Supporting a wide array of respiratory conditions, the Inogen One G2 and G3 concentrators deliver oxygen effectively, which can be critical for conditions like COPD and asthma. With different pulse settings, the devices match the oxygen requirements prescribed for various lung diseases.

  • Inogen One G2: It offers up to pulse setting 5, suitable for patients who require a higher flow rate.
  • Inogen One G3: Provides up to pulse setting 4, which suffices for oxygen users requiring intermediate flow levels.

These concentrators offer a means to manage respiratory conditions without the restrictions imposed by stationary oxygen delivery systems, enhancing the user’s quality of life and providing robust support for those dealing with chronic lung diseases.

Safety and Regulations

The Inogen One G2 and G3 are displayed side by side, with prominent safety and regulatory symbols and labels visible on both devices

In discussing the Inogen One G2 and G3 Portable Oxygen Concentrators, it’s imperative to consider their adherence to safety regulations and industry standards, specifically when it involves travel and the assurance of quality manufacturing.

FAA Regulations

The Federal Aviation Administration (FAA) has specific guidelines for portable oxygen concentrators used during air travel. Both the Inogen One G2 and Inogen One G3 models are FAA approved for in-flight use. This approval allows patients requiring oxygen therapy to travel with these devices on board commercial aircrafts. The specific regulations include:

  • Portable Oxygen Concentrators must be stowed under the seat or in the overhead bin for takeoff and landing.
  • The device must fit within the airlines’ carry-on baggage dimensions.
  • Passengers must have a sufficient battery charge for 150% of the expected maximum flight duration.

Medical Standards Compliance

Quality and reliability are essential in medical equipment. Both the Inogen One G2 and G3 comply with medical standards that ensure these devices are safe for use and effectively deliver the required oxygen therapy. The machines maintain oxygen concentration levels between 87% to 95.6% across all settings, which aligns with medical requirements for supplemental oxygen.

Furthermore, these concentrators have undergone rigorous testing for quality manufacturing to minimize service issues, adhering to:

  • International standards for the safety of electrical equipment and electromagnetic compatibility.
  • Quality management systems that guarantee consistent performance and reliability.

By complying with both FAA regulations and medical standards, the Inogen One G2 and G3 ensure safe and reliable oxygen delivery for users both during ground-level daily activities and while traveling by air.

Warranty and Support

A table with two portable oxygen concentrators, one labeled "Inogen One G2" and the other "Inogen One G3." A customer service representative is handing a warranty and support manual to a customer

When considering the Inogen One G2 and G3 portable oxygen concentrators, consumers find peace of mind knowing they are backed by a dependable warranty. Additionally, knowledgeable customer support ensures users have access to expert advice for any service issues that may arise.

Warranty Details

Both the Inogen One G2 and G3 models come with a 3-year limited warranty. This warranty covers any defects in materials and workmanship under normal use. The warranty is indicative of Inogen’s confidence in their product’s reliability in the market. It’s important to note that the warranty does not cover:

  • Routine service items
  • Disposable items, such as nasal cannulas or nasal interfaces
  • Issues arising from the use of unauthorized accessories or parts

Customer Support and Service

Inogen provides customers with comprehensive support and service options. Their team includes certified respiratory therapists available to assist with any technical or medical inquiries related to the use of the G2 and G3 models. The customer support is tailored to address service issues effectively and includes:

  • Full manuals and user guides for each model
  • Direct access to customer care representatives who can guide through troubleshooting steps
  • Service centres that handle maintenance and repairs

The company aims to ensure users experience minimal disruption in their oxygen therapy, maintaining Inogen’s commitment to delivering dependable respiratory care solutions.

Comparative Analysis

Two Inogen portable oxygen concentrators side by side, labeled "G2" and "G3", with their respective features and specifications displayed for comparison

This section offers a detailed look into how the Inogen One G2 and Inogen One G3 stand within the market and what customers feel about these oxygen concentrators. Specifics on market trends and consumer insights will be emphasized.

Market Positioning and Pricing

The Inogen One G2 and Inogen One G3 have established themselves as competitive portable oxygen concentrators in an evolving market. The G2 is positioned for users requiring a higher pulse dose of oxygen, with settings up to six, while the G3 caters to those who need settings between one and four. In terms of pricing, both models align with Inogen’s reputation for producing high-end devices, but the specific cost may vary depending on factors such as battery size, additional accessories, and retailer promotions.

User Experiences and Feedback

For the Inogen One G2, customers have generally appreciated the device’s capability to provide a higher pulse dose setting. However, there have been mentions of a noisy purging sound associated with its operation. Alternatively, the Inogen One G3 is often praised for its quieter motors, improving user comfort, especially in quiet environments. The design improvements, including a lighter weight and longer-lasting battery options, have contributed to positive feedback for the Inogen One G3, making it a preferred choice for active users seeking portability without sacrificing oxygen delivery performance.

Frequently Asked Questions

The Inogen One G2 and G3 units sit side by side, displaying their sleek designs and compact sizes. The G3 appears slightly smaller, with a more modern and streamlined appearance compared to the G2

When considering the Inogen One G2 and G3 portable oxygen concentrators, potential buyers often inquire about their differences in weight, battery life, oxygen delivery, technological advancements, portability, and unique accessories.

What are the weight differences between the Inogen One G2 and G3 portable oxygen concentrators?

The Inogen One G3 is notable for its reduced weight of 5 pounds compared to the Inogen One G2, which weighs 7.25 pounds with the 12-cell battery installed.

How do the battery life spans compare between the Inogen One G2 and G3 models?

Battery life span varies based on the setting used, but generally, the Inogen One G2 offers a longer battery duration than the G3 due to its larger size and capacity.

Can the Inogen One G3 deliver more oxygen per minute than the G2?

The Inogen One G3 is efficient in delivering oxygen, with maximum output at setting 5 of up to 1050 ml per minute. However, the G2 now offers pulse settings up to 6, potentially providing a higher oxygen output per breath at a matching or higher breath rate.

What advancements in technology are present in the Inogen One G3 when compared with the G2?

The Inogen One G3 is designed to be lighter and more user-friendly, with an intuitive interface and improved ergonomics for ease of use compared to the older G2 model.

Are there any size and portability advantages of the Inogen One G3 over the G2?

The Inogen One G3 is smaller and lighter, thus enhancing its portability. It was crafted with an emphasis on ease of transport for users who require mobility.

What accessories are unique to the Inogen One G3 that are not available with the G2?

While both models share several common accessories, the Inogen One G3 has been updated with newer, enhanced accessories designed for its form factor and functionality, aligning with the model’s overall more modern design.

The team at are experts when it comes to oxygen concentrators. We are dedicated to providing as much help as we can for people who are undergoing oxygen therapy and need help with oxygen concentrators. We research and immerse ourselves in the industry and are assisted by our team of medical experts.

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