How we reviewed this: HHZ didn’t test this device hands-on. This review is written from the manufacturer’s user manual and published specifications, linked below, plus a U.S. retail price checked on 13 October 2026. We don’t report comfort, noise or reliability impressions we haven’t measured.
Key specs
| Spec | CAIRE Companion 5 | Source |
|---|---|---|
| Price (U.S.) | $995 | DME Supply USA |
| Flow | 0.5–5.0 LPM continuous | CAIRE manual |
| Oxygen purity | 90% (+5.5/−3%) | Manual |
| Power | 285 W at 2 LPM; 350 W max | Manual |
| Sound | 50 dB(A) at 2 LPM | Manual |
| Weight | 36 lb | Manual |
| Size | 21.5 x 12.5 x 13.5 in | Manual |
| Operating temperature | 41–104°F; 15–90% humidity | Manual |
| Altitude | −1,253 to 9,879 ft | Manual |
| Duty | Up to 24 hours a day | Manual |
| Oxygen monitor | OCSI on some models | Manual |
| Service life | At least 5 years | Manual |
| Warranty | 3 years | CAIRE |
Running cost
At 285 W for 24 hours a day, the Companion 5 uses about 6.8 kWh a day (285 W x 24 h), or roughly 208 kWh in a 30.4-day month. Multiply by your utility’s rate; our electricity cost guide uses EIA averages.
Compared with a 10 LPM unit
| Companion 5 | DeVilbiss 1025DS | NewLife Intensity 10 | |
|---|---|---|---|
| Price | $995 | $1,399 | $1,299 |
| Flow | 0.5–5 LPM | 2–10 LPM | 2–10 LPM |
| Weight | 36 lb | 42 lb | 58 lb |
| Power | 285 W at 2 LPM | 639 W average | 600 W |
| Sound | 50 dB(A) at 2 LPM | Under 59 dBA | 58 dB(A) |
See 5 LPM vs 10 LPM for who needs which.
Safety points from the manual
- Keep at least 12 in of clearance around the unit.
- Don’t use extension cords.
- No smoking or open flames near oxygen (home oxygen fire safety).
Verdict
From the documents, the Companion 5 is a lighter, lower-power choice for anyone prescribed 5 LPM or less, with a low 0.5 LPM minimum and a high altitude rating. If your prescription could rise above 5 LPM, look at a 10 LPM model instead.
Related: oxygen concentrator buyer’s guide, Medicare oxygen coverage, used and refurbished concentrators.