Reference table

CPAP Power Consumption by Machine

Select your machine to see estimated power draw at different pressure settings — base, low humidifier, and high humidifier.

Select CPAP machine

Estimated power draw at typical pressure settings. Actual draw varies with mask fit, altitude, and accessories.

Pressure (cmH₂O)	Base draw	+ Low humidifier	+ High humidifier
6	15.8 W	27.8 W	43.8 W
8	16.9 W	28.9 W	44.9 W
10	18 W	30 W	46 W
12	19.1 W	31.1 W	47.1 W
14	20.2 W	32.2 W	48.2 W
16	21.2 W	33.2 W	49.2 W
18	22.3 W	34.3 W	50.3 W
20	23.4 W	35.4 W	51.4 W

Sources: Manufacturer specifications, ResMed Battery Guide, community-tested averages. Draw varies ±15% based on mask leak, altitude, and machine firmware. ResMed Official Battery Guide (PDF)