The HumidAire 2iC Tub Assembly is the water chamber that can be integrated into the ResMed S7 series CPAP machines. This is the replacement water chamber for the HumidAire 2iC cold passover humidifier. This water chamber has a plastic bottom (not a metal bottom like part number 30951). Click here for the replacement water chamber for the HumidAire 2i heated humidifier, which is part 30951.

This is a genuine ResMed replacement part and is brand new, like all the CPAP supplies we sell.

The HumidAire 2iC Tub Assembly is only compatible with the ResMed HumidAire 2iC cold passover humidifier. At the air outlet port is is compatible with all standard CPAP tubing and all CPAP masks.