Technical Specifications, Power Supply

24 dBA with uncertainty of 2 dBA as measured according to ISO 17510-1: 2002

26 dBA with uncertainty of 2 dBA as measured according to ISO 17510-1: 2007

34 dBA with uncertainty of 2 dBA as measured according to ISO 17510-1: 2007

Recommended maximum supplemental oxygen flow: 4 L/min

Problem/Possible Cause	Solution

The following message is displayed on the LCD after you try to update settings or copy data to the Data Card: Settings Invalid Remove Card

The identification details on the	Contact your clinician immediately.
Data Card do not match the
identification details on your device.

Technical Specifications

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Operating pressure range	4 to 20 cm H2O
Dimensions (H x W x D)	112 mm x 164 mm x 145 mm
Weight	1.4 kg
Operating Temperature	+5°C to +36°C
Power Supply	• Input range for S8 Series II with H4i:100–240V, 50/60Hz; 110V,
	400Hz; 2.5A < 140VA (110W) (maximum power consumption).
	Instantaneous peak power consumption <340VA.
	• Refer to the DC-12 converter instructions for DC ratings. Only
	use the ResMed DC-12 converter for DC input.
	• Typical power consumption at 20 cm H20 is 39VA or 20.7W.
Operating Humidity	10%–95% non-condensing
Storage and Transport	-20ºC to +60ºC
Temperature
Storage and Transport	10%–95% non-condensing
Humidity
Operating Altitude	Sea level to 2,591 m
Electromagnetic	Product complies with all applicable electromagnetic compatibility
Compatibility	requirements (EMC) according to IEC60601-1-2, for residential,
	commercial, and light industry environments.
	The electromagnetic compatibility tables for these ResMed devices
	can be found on www.resmed.com, on the Products page under
	Service & Support. Click on the PDF file for your device.
Air Filter	Two-layered, powder-bonded, polyester non-woven fiber
Air Tubing	Flexible plastic, 2 m
Air Outlet	The 22 mm conical outlet complies with EN 1281-1
IEC 60601-1 Classifications	Class II (double insulation), Type CF
Housing Construction	Flame retardant engineering thermoplastic

DECLARED DUAL-NUMBER NOISE EMISSION VALUES in accordance with ISO 4871: Sound Pressure Level

Sound Power Level

Supplemental Oxygen

The manufacturer reserves the right to change these specifications without notice.