BMC RESMART CPAP Accessories Resmart G2 Water ChamberBMC RESMART CPAP Accessories Resmart G2 Water Chamber Product Features: The Water Chamber is the replacement chamber used with the H60 Heated Humidifier which is the integrated humidifier for use with the BMC GII CPAP Series Machines. Please Note: The water chamber is not filled from the top. To refill the water, locate the small dial located on the front corner on the bottom of the chamber. This water chamber is only compatible with the BMC GII CPAP