Inogen G3 vs G5: Comprehensive Comparison of Portable Oxygen Concentrators

In the realm of portable oxygen concentrators, the Inogen One G3 and Inogen One G5 models present users with high-performance options that cater to varying respiratory support needs. The Inogen One G3 offers dependable service with a single battery lasting approximately 4 hours and a double battery extending to 8.5 hours on a typical setting of 2. The newer Inogen One G5 further pushes the envelope in terms of battery longevity, managing up to 4.5 hours on a single battery and 9 hours with a double battery. This significant advancement in battery life underlines the Inogen’s commitment to improving patient mobility and quality of life.

The sleek Inogen G3 and G5 portable oxygen concentrators sit side by side, with the G5 displaying its larger display screen and user-friendly interface, while the G3 shows its compact size and lightweight design

Not only is battery life a critical factor in choosing the right oxygen concentrator, but so is the performance in delivering oxygen to the patient. The Inogen One G5 introduces a higher maximum pulse dose flow setting compared to the G3, expanding from settings of 1 to 5 to a broader range of 1 to 6. This caters to a spectrum of patients with varied oxygen requirements. Both devices are designed with active lifestyles in mind; however, the G5’s extended flow settings and battery life make it a more versatile option for those with higher oxygen demands or for patients who prefer fewer charging intervals during their day-to-day activities.

Key Takeaways

  • The Inogen One G3 and G5 offer portable oxygen solutions with different battery lives and oxygen flow settings.
  • Increased battery life and higher flow settings in the G5 cater to patients requiring more robust oxygen support.
  • The choice between the G3 and G5 models hinges on individual patient needs and lifestyle considerations.

Comparing Inogen One G3 and G5

The Inogen One G3 and G5 are placed side by side, with their sleek and compact designs highlighted. The G3 is slightly smaller, while the G5 features a more modern and streamlined appearance

When considering a portable oxygen concentrator from Inogen, the G3 and G5 models offer specific features tailored to various needs. They differ in aspects such as oxygen delivery, battery life, and portability.

Key Features

The Inogen One G3 offers users a reliable oxygen delivery with settings ranging from 1 to 5, while the Inogen One G5 advances this range up to a setting of 6. A notable feature is the G5’s increased maximum oxygen output when compared to the G3, enhancing support for those with higher oxygen demands.

Design and Portability

Both models champion portability, but the G5 stands out with its more compact and lighter frame. The G5’s dimensions and weight make it one of the most portable oxygen concentrators on the market. In comparison, the G3 is slightly larger and heavier but still offers a manageable design for everyday mobility.

Oxygen Delivery System

Both the G3 and G5 utilize a pulse dose delivery system. Neither device provides continuous flow options; rather, they offer efficient oxygen delivery synchronized with the user’s breathing rate. This technology is suited for users with active lifestyles who need oxygen therapy while on the move.

Battery and Power Options

Battery options are where these models notably diverge:

  • G3: Approximately 4 hours with a single battery and up to 8.5 hours with a double battery
  • G5: Lasts up to 4.5 hours on a single battery and extends to 9 hours with a double battery

Both models feature an external battery charger, facilitating the use of one battery while charging another. However, the G5’s longer battery life supports users with extended needs without frequent charging.

Performance Metrics

The Inogen G3 and G5 are displayed side by side, with their respective performance metrics highlighted in a comparison chart

When comparing the Inogen One G3 and Inogen One G5, several performance metrics stand out, such as oxygen concentration levels, flow settings, noise level, and battery duration. These are crucial for evaluating the overall functionality and suitability for user needs.

Oxygen Concentration Levels

The Inogen One G3 and Inogen One G5 maintain similar oxygen concentration levels, with both devices capable of providing a high concentration of oxygen to users, which is critical for those with respiratory conditions.

Flow Settings

  • Inogen One G3: Offers flow settings from 1 to 5.
  • Inogen One G5: Broadens the range with flow settings from 1 to 6, accommodating a greater variety of oxygen therapy needs.

Noise Level

Both units operate relatively quietly. The Inogen One G3 has a noise level that is typically around 39 decibels, and the Inogen One G5 slightly betters this with a marginally reduced noise level, thus ensuring a less intrusive user experience.

Battery Duration

  • Inogen One G3: It has an approximate battery life of:

    • 4 hours with a single battery
    • 8.5 hours with a double battery (on a setting of 2)
  • Inogen One G5: It provides extended battery life compared to the G3, lasting up to:

    • 6.5 hours with a single battery
    • 13 hours with a double battery

The increased battery duration of the Inogen One G5 supports a more active lifestyle with fewer interruptions for charging, enhancing user autonomy and convenience.

Patient Lifestyle Considerations

A person using the Inogen G3 and G5 portable oxygen concentrators in different lifestyle settings, such as at home, outdoors, and while traveling

When comparing the Inogen G3 and G5 portable oxygen concentrators, one must consider how these devices align with patient needs in terms of mobility, travel, ease of use, and available accessories.

Mobility and Independence

The Inogen One G3 and G5 both offer patients distinct levels of mobility and independence. The G5, in particular, supports higher flow settings, ranging from 1 to 6, catering to patients with more severe respiratory conditions who require higher oxygen flow rates. It also boasts a longer battery life, with 6.5 to 13 hours of usage on a single charge, which is crucial for individuals leading an active lifestyle without frequent access to charging facilities. The G3, while offering a respectable 4 to 8 hours of battery life, may be more suitable for those with milder conditions and lower oxygen demands.

Travel Compliance

Both the Inogen One G3 and G5 are FAA-approved, meaning they can be used on airplanes, adhering to regulations set by the Federal Aviation Administration. The longer battery life of the G5 can be especially beneficial for those who travel frequently, providing peace of mind during long flights without the need for recharging.

Ease of Use

Ease of use is paramount when it comes to portable oxygen concentrators. Both the Inogen G3 and G5 feature straightforward controls that allow patients to adjust oxygen flow easily. However, the G5’s updated design includes a large LCD screen and intuitive controls, enhancing the user experience for patients who may struggle with visibility or dexterity.

Accessories and Add-ons

The range of accessories available for both models includes external batteries, carry bags, and cart options, increasing portability and convenience. Compatibility with Medicare and other financing options also assists with affordability, allowing patients to select additional accessories that best enhance their quality of life and oxygen therapy experience.

When making a choice between the Inogen One G3 and G5, it is important to consider the degree of mobility, travel needs, the simplicity of operating the device, and the compatibility with necessary accessories, all of which can significantly impact a patient’s quality of life.

Technological Innovations

The Inogen G3 and G5 sit side by side, showcasing their sleek, modern designs. The G3 features a compact size, while the G5 boasts a larger, more advanced look. Both devices emit a soft glow, highlighting their innovative

The Inogen One G3 and G5 portable oxygen concentrators are distinguished by their advanced technology designed to enhance the user experience, particularly in terms of oxygen delivery, monitoring, and device management.

Intelligent Delivery Technology

Both the Inogen One G3 and G5 units employ Intelligent Delivery Technology®, which is a pulse dose system capable of adjusting to the user’s breathing rate. This ensures that oxygen is efficiently delivered within the crucial first 400 milliseconds of the breath, which is the most impactful moment for gas exchange in the lungs. The Inogen One G5, offering six flow settings compared to its predecessor’s five, reflects an evolution in customization to meet diverse user needs.

Inogen Connect App

The newer Inogen One G5 is compatible with the Inogen Connect App, an innovative solution that allows users to monitor their concentrator through a mobile application. It provides real-time status updates and maintenance alerts, enhancing the user’s ability to manage their device’s performance effectively.

Bluetooth Functionality

To facilitate the use of the Inogen Connect App, both the Inogen One G3 and G5 models incorporate Bluetooth technology. This integration enables seamless pairing with a user’s smartphone, leveraging the capabilities of Inogen Connect to monitor the device, check battery life, and access software updates, all contributing to an empowered and informed user experience.

Health Considerations and Therapy

A person using an Inogen G3 or G5 portable oxygen concentrator while engaging in various activities, such as exercising, reading, or spending time with family

Selecting the right portable oxygen concentrator is essential for managing respiratory conditions effectively. The Inogen One G3 and G5 offer different capabilities tailored to varying health needs, focusing on conditions such as COPD, and directly influencing a patient’s quality of life.

COPD Management

Inogen One G3 and G5 concentrators are designed for patients requiring supplemental oxygen for Chronic Obstructive Pulmonary Disease (COPD). The G3 model offers up to a 5 pulse dose setting, suited for mild to moderate COPD. For more advanced stages, especially stages 3 and 4 COPD, where doctors might recommend a higher flow rate, the Inogen One G5 provides a higher pulse dose setting of up to 6, catering to more intensive oxygen therapy needs.

Asthma and Other Conditions

Although primarily tailored for COPD, these devices can also assist other respiratory conditions that require oxygen therapy, such as asthma. It is critical to note that any use of these devices should strictly adhere to a doctor’s prescription, as asthma and other conditions might have specific oxygen level requirements unique to the individual patient.

Quality of Life Improvements

The portability of both Inogen One G3 and G5 units can significantly impact a patient’s quality of life. They allow oxygen patients to maintain an active lifestyle while receiving the necessary oxygen therapy. Longer battery life in the G5, up to 9 hours with the double battery, compared to the G3’s 8.5 hours, affords greater freedom and autonomy during daily activities and travel.

Costs and Warranty

The inogen g3 and g5 models are displayed side by side, with clear labels indicating their respective costs and warranty details

When comparing the Inogen G3 and G5 portable oxygen concentrators, potential buyers should closely consider the differences in pricing and the warranties offered for these devices. Both factors can significantly impact long-term satisfaction and cost-effectiveness.


The Inogen One G3 and Inogen One G5 come with different price points that reflect their capabilities and battery life.

  • Inogen One G3: Prices may vary based on the retailer and package, but generally, it is less expensive than the G5 due to older technology and lower flow settings.

  • Inogen One G5: Typically, the G5 is priced higher as it’s a more advanced model which includes higher flow settings and longer battery life.

Warranty and Service

Inogen offers warranties for their portable oxygen concentrators, which provide users with a safety net for their investments.

  • Inogen One G3: The G3 usually comes with a standard 3-year warranty. Customarily, this covers the device and provides peace of mind to the consumer for a significant period after their purchase.

  • Inogen One G5: The Inogen G5 may include a lifetime warranty through certain retailers, as per the promotional materials, ensuring extended protection that can potentially include drop coverage, filters, and software updates among other services.

Buyers should consult with the retailer to confirm the specifics of each warranty and any additional service packages that may come with their purchase to ensure they are making an informed decision.

Brand and Product Reliability

A side-by-side comparison of Inogen G3 and G5 with reliability indicators and customer reviews displayed

In evaluating the reliability of Inogen’s G3 and G5 portable oxygen concentrators, one must consider the Inogen brand’s reputation, user feedback, and the certifications backing these devices. These facets provide a comprehensive view of the products’ dependability and quality, as well as a side-by-side comparison of their performance.

Inogen Brand Profile

Inogen has established itself as a reputable manufacturer in the medical oxygen industry, noted for its quality and efficiency. The company specializes in portable oxygen concentrators, such as the Inogen One G3 and Inogen One G5, and competes with other brands like Respironics and ResMed. Consumers looking for reliable and quiet operation in oxygen delivery systems have commonly turned to Inogen.

Customer Reviews

Customer testimonials often reflect the reliability of a brand. The Inogen One G3 and G5 models have received positive feedback for their durability and performance. A majority of users report a high level of satisfaction with the battery life and portability, which is crucial for individuals requiring oxygen therapy while leading an active lifestyle.

  • Inogen One G3: Generally well-received for its lighter weight and ease of use.
  • Inogen One G5: Praised for offering increased flow settings and longer battery life, making it suitable for users with higher oxygen requirements.

Certifications and Approvals

Both Inogen One G3 and G5 come with necessary medical certifications and approvals, ensuring that they meet specific safety and health standards for medical devices.

  • Inogen One G3: Holds FDA approval, certifying its safe use as a medical device.
  • Inogen One G5: It also possesses FDA approval, alongside newer technology enhancements to boost its reliability further.

The certifications reaffirm the quality care and diligence Inogen has put into developing reliable medical equipment, further instilling confidence in users about the brand’s commitment to safety and efficacy.

Frequently Asked Questions

The Inogen G3 and G5 units are displayed side by side with a list of frequently asked questions next to them

When comparing the Inogen G3 and G5 portable oxygen concentrators, important distinctions like weight, battery life, and specific user concerns arise. The details presented below address these differences succinctly, providing clarity to prospective users.

What are the weight differences between the Inogen G3 and G5 models?

The Inogen G3 model is known for its lightweight design, weighing 4.8 pounds. In contrast, the Inogen G5 is slightly heavier, with a total weight of 4.7 pounds, making both models suitable for portability.

How does the battery life of the Inogen G5 compare to that of the G3?

The Inogen G5 boasts a longer battery life, lasting up to 4.5 hours with a single battery and 9 hours with a double battery. The Inogen G3, however, provides up to 4 hours of use with a single battery or 8.5 hours with a double battery when set at level 2.

What are some common issues faced by users of the Inogen One G5?

Users of the Inogen One G5 occasionally report concerns about learning the device’s operations, occasional error messages, and the need for regular maintenance to ensure optimal performance.

How do the specifications of the Inogen G3 model compare to those of the G5?

The Inogen G3 offers flow settings from 1 to 5, while the G5 allows users to choose from settings of 1 to 6. The G5 also has a longer battery life and a wider overall flow range, accommodating more severe respiratory conditions.

What is the expected lifespan of an Inogen G3 portable oxygen concentrator?

The Inogen G3 portable oxygen concentrator has a durable build and, with proper maintenance, users can expect a lifespan of several years, varying based on individual usage patterns and care of the device.

Does Medicare provide coverage for the Inogen One G3?

Medicare may cover the Inogen One G3 under durable medical equipment (DME) benefits, but individual coverage varies. Users should consult their specific plan to determine eligibility for coverage.

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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