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This HumidAire™ H2i replacement humidifier tub assembly (water chamber) is intended for use with the S7 AutoSet™ Spirit, VPAP III & S7 Systems.
These models of CPAP an bi-level devices are older and have been succeeded by the S8 and S9 Series and now the all new AirSense™ 10 series of sleep apnea therapy devices.
If you are currently using the S7 series and you are looking to upgrade please contact our staff today about specials on new models.