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Caire Companion 5 Oxygen Concentrator Review

October 16, 2023
Caire Companion 5 Stationary Oxygen Concentrator Review Caire Companion 5 Stationary Oxygen Concentrator Review

This post was originally published on June 18, 2020 and updated on October 16, 2023.

What is the Caire Companion 5 Oxygen Concentrator?

The Caire Companion 5 is a home oxygen concentrator that offers a continuous flow of up to 5 liters of oxygen per minute (LPM). Weighing only 36 lbs, this compact unit rests on sturdy castors and comes with an integrated top handle that make it easy to move from room to room.

Key Features of the Caire Companion 5 Oxygen Concentrator

The Caire Companion 5 combines ease of use with high performance. A simple on/off toggle switch, flow control knob and LED indicators make up the user interface for this concentrator. In addition to the ease of use, ultraSILENT Technology and a number of built-in mufflers help to reduce the amount of noise generated by the Companion 5. At 2 LPM, this concentrator runs at roughly 40 dbA–quieter than a conversation and perfect for those with noise sensitivities!

Benefits of Using the Caire Companion 5 Oxygen Concentrator

For many patients, daily oxygen therapy is required and home oxygen concentrators can drain a lot of energy. The Caire Companion 5 features autoFLOW™ Technology which reduces power by 15%. Even at its highest setting, it uses less than 350 watts of power. This makes it one of the most energy efficient home concentrators on the market. 

The Caire Companion 5 intake filters only need to be replaced every two years. If you experience dried-out nasal passages from therapy, the Companion 5 works with standard humidification bottles that secure directly to the front of the machine.

How Does the Caire Companion 5 Compare to its Competitors?

On a scale of 1-10 with 10 being the best, the Caire Companion 5 Oxygen Concentrator ranks high for important features. 

FeaturesCaire Companion 5 Oxygen ConcentratorInogen At Home Stationary Oxygen ConcentratorDeVilbiss Compact 525 Oxygen ConcentratorPhilips Respironics EverFlo Q Oxygen Concentrator
Power Consumption 10766
Sound Level1010610

Caire Companion 5 Oxygen Concentrator Design

The Caire Companion 5 is designed for easy use. As previously mentioned, the interface comes outfitted with LED lights, on/off toggle switch, and a simple rotating flow control knob offers effortless operation. Audible alarms will sound in the event of power failure, general system malfunctions, or oxygen purity levels below 85%.

Power Consumption

At only 285 watts of average power consumption, the Caire Companion 5 maintains a low energy profile for daily home use. 

Sound Level

At 40 dBA, the Caire Companion 5 is comparable in noise level to most continuous flow home oxygen concentrators. The intake filter combines with a two-chamber muffler, reducing the intake sounds.

Liter Flow

The versatile air flow of the Caire Companion 5 offers more options to patients at high oxygen purity levels, delivering up to 5LPM continuous flow oxygen, in 0.5LPM increments.


The easy access two-year filter makes the Caire Companion 5 one of the most low-maintenance oxygen concentrators on the market. Fewer filter changes means less work for patients. 

How Much Does the Caire Companion 5 Oxygen Concentrator Cost?

The Companion 5 Oxygen Concentrator is currently available for $800. The reasonable cost is much lower than many home concentrators. Prices are subject to change.

Ease of Use

The simple interface makes changing settings and responding to alerts easier. Patients will find operating their oxygen concentrator an intuitive hassle-free experience.

Is There a Warranty?

The Caire Companion 5 Oxygen Concentrator comes with a standard three-year warranty.

Where Can You Buy It?

You can purchase the Caire Companion 5 at The Oxygen Concentrator Supplies Shop.

Is There Any Discount on the Caire Companion 5 Oxygen Concentrator? 

There are currently no discounts on the Caire Companion 5 Oxygen Concentrator. Be sure to sign up for email notifications to receive the latest updates on pricing.

If you have questions about the Caire Companion 5 or oxygen therapy in general, please feel free to contact our expert customer care team. We are available to assist you via phone at 888-941-1688 or via email at

This post is based on the author’s sole review. Being a trusted online retailer, we sell only top-rated oxygen concentrators. We also want to hear your reviews and comments if you have used this product. Please ask any questions you may have regarding this product.

Jose Acosta

Jose Acosta, CRT, is a certified respiratory therapist with 15+ years of experience delivering both institutional and home-based respiratory care. Skilled in Medical Devices, Software Implementation, Healthcare Information Technology (HIT), Software Test