Sources: NOAA NCEI 1991–2020 normals for Las Vegas airport; manufacturers’ manuals linked below. HHZ didn’t test any devices; the limits below come from manufacturers’ manuals.
Las Vegas temperatures (airport, 1991–2020)
| Month | Normal high | Normal low |
|---|---|---|
| May | 88.5°F | 66.1°F |
| June | 99.4°F | 75.8°F |
| July | 104.5°F | 82.0°F |
| August | 102.8°F | 80.6°F |
| September | 94.9°F | 72.4°F |
Station elevation: 649.5 m (about 2,131 ft).
Device limits
| Device | Operating temperature | Operating humidity | Source |
|---|---|---|---|
| ResMed AirSense 11 | 41–95°F | 10–95% RH, non-condensing | User guide |
| ResMed AirCurve 11 | 41–95°F | 10–95% RH, non-condensing | User guide |
| Inogen Rove 4 / Rove 6 | 41–104°F | 15–90%, non-condensing | Rove 4, Rove 6 |
| CAIRE FreeStyle Comfort | 41–104°F | 15–95% RH, non-condensing | Manual |
| Oxlife Independence | 50–104°F | 10–95% at 82.4°F | Manual |
What this means
| Situation | Guidance from the documents |
|---|---|
| CPAP at night | Normal summer lows (75.8–82.0°F) are inside the 95°F limit; use air conditioning |
| POC outdoors at midday | July’s normal 104.5°F is just over the 104°F limit; seek shade and cool breaks |
| Device left in a car | Storage ranges go to 158°F (AirSense 11, Rove 6), operation doesn’t; let it cool |
| Dry air | Within the humidity ranges; see CPAP dry mouth and heated tubing |
| Flying in | See flying with a CPAP and FAA POC rules |
Verdict
Las Vegas is a little milder than Phoenix but still exceeds CPAP operating limits in summer daytime. Keep equipment air-conditioned and plan outdoor oxygen use around the heat.
Related: Phoenix heat guide, power outage plan.