Calibration Pneumotachograph: A simple procedure controlled by the software EXPAIR for a quality value Nasal Pressure Sensor: Calibration performed during the annual maintenance of the device but can be done more often by the user Cleaning and disinfection Sensitive elements are easily removed and cleaned with cold disinfectant General specifications Dimensions (HxWxD)cm: 13x19x29.5 Weight: +/- 4.2 kg Power Requirements: 230/115 VAC 50/60 Hz Power Consumption: +/- 15 VA Warm up Time: 20 minutes minimum