ResMed Replacement Tub for HumidAir H4i CPAP Humidifier humdifer Filters out troublesome particles like

Filters out troublesome particles like household dust

is designed to be worn loosely to adapt to individual facial contours

the heated tube can be set to one of five heat settings

SmartRamp: SmartRamp will monitor the user and increase pressure only if an event occurs

ResMed Replacement Tub for HumidAir H4i CPAP Humidifier humdifer Filters out troublesome particles likeReplacement tub for the H4i Humidair Humidifier, used on S8 machines. The Humidair 4i is an optional upgrade for ResMed S8 CPAP, Autoset Spirit and Autoscore flow generators. The H4i clips onto the front of the S8, replacing the front sound baffle. Make sure your Humidifier is an H4i before you order this replacement tub.