For 8 hours from a station’s AC outlet, about 66 Wh for a ResMed AirSense 10 without its humidifier, 208 Wh with it, and 320 Wh with the heated tube as well.
ResMed’s figures, and the station for a night
| AirSense 10 AutoSet | Wh for each hour | Station for 8 hours |
|---|---|---|
| Device only | 7 Wh | 66 Wh |
| With the humidifier | 22 Wh | 208 Wh |
| With the humidifier and ClimateLineAir heated tube | 34 Wh | 320 Wh |
ResMed measured these at 8 to 15 cm H2O with the humidity at 6. In its battery guide, the draw rises with pressure, humidity setting and tube temperature: with the humidifier at 8 and ClimateLineAir at 30 °C, from 4.71 A at 6 cm H2O to 5.61 A at 20.
| Setting | Draw at 12 V | ResMed’s battery |
|---|---|---|
| With SlimLine tubing, no humidifier | 0.93 A (about 11 W) | 12 Ah |
| With the humidifier at 4 | 2.30 A (about 28 W) | 28 Ah |
| With the humidifier at 8 | 3.66 A (about 44 W) | 44 Ah |
| With ClimateLineAir at 30 °C and the humidifier at 8 | 4.92 A (about 59 W) | 60 Ah |
ResMed’s battery sizes are for 8 hours through its DC-to-DC converter and include a 50% safety margin. For another number of hours, the power station size calculator does the station sum from your machine’s watts.
The humidifier
On ResMed’s power sheet the humidifier takes the AirSense 10 from 7 to 22 Wh an hour, and the heated tube adds more. Anker SOLIX also says heated humidifiers significantly increase power draw and shorten runtime.
ResMed’s AirSense 11 guide says not to use the machine with water in the humidifier tub while in transit, such as in a vehicle.
Running it from a battery
ResMed’s battery guide strongly recommends a ResMed DC-to-DC converter, the Air10 DC/DC converter for the AirSense 10, over an inverter. Where it allows an inverter, it recommends a pure sine wave one rated 300 W continuous and 500 W surge, and it says modified sine wave inverters can damage sensitive electronics.
ResMed Australia’s camping page names a marine or deep cycle battery of 50 Ah or more, with a ResMed converter or a modified sine wave inverter of 150 W or more, for the AirSense 10.
AirSense 11
ResMed rates the AirSense 11’s power supply at 65 W output; it lists the supply’s typical draw from the outlet as 56.1 W and its peak as 73.2 W. That’s a power supply rating, not a night’s measured use, so the station sizes above don’t cover it. ResMed lists an Air11 DC/DC converter among its accessories.
Philips DreamStation Go
Philips says the DreamStation Go’s own battery lasts 1 to 2 nights depending on pressure, and ran 13 hours at 10 cm H2O in its test, recharging in under 5 hours. To run it from an external battery, Philips recommends a DC to AC inverter of 150 W or more with an output of 100 to 240 V.
For the full-size DreamStation, the label on its power supply lists its rating.
Check with your equipment supplier
This page gives makers’ power figures, not medical advice. Check with your equipment supplier before you rely on a power station for your therapy. For a power cord to use abroad, ResMed says to contact your care provider.