Abstract: There is disclosed a fluid adapter for a breathable gas delivery device, such as a facemask, for delivering breathable gas to a user. The fluid adapter comprises an adapter body defining an adapter chamber; a pressurized gas inlet port in fluid communication with the adapter chamber and arranged to be fluidically coupled to a source of pressurized breathable gas and an ambient air inlet port arranged to provide fluid communication between the adapter chamber and ambient air outside of the fluid adapter. The adapter also comprises an adapter outlet port in fluid communication with the adapter chamber and arranged to be fluidically coupled to a delivery device gas inlet port of the breathable gas delivery device; and an adapter connector arranged to connect the fluid adapter to the breathable gas delivery device such that the adapter outlet port is fluidically coupled to the delivery device gas inlet port.

Abstract: There is disclosed a fluid adapter for a breathable gas delivery device, such as a facemask, for delivering breathable gas to a user. The fluid adapter comprises an adapter body defining an adapter chamber; a pressurised gas inlet port in fluid communication with the adapter chamber and arranged to be fluidically coupled to a source of pressurised breathable gas and an ambient air inlet port arranged to provide fluid communication between the adapter chamber and ambient air outside of the fluid adapter. The adapter also comprises an adapter outlet port in fluid communication with the adapter chamber and arranged to be fluidically coupled to a delivery device gas inlet port of the breathable gas delivery device; and an adapter connector arranged to connect the fluid adapter to the breathable gas delivery device such that the adapter outlet port is fluidically coupled to the delivery device gas inlet port.

Abstract: There is disclosed a valve assembly for controlling the supply of breathable gas to a user, comprising a valve assembly inlet port for a source of breathable gas and a valve assembly outlet port for delivering breathable gas to a user. The valve assembly also comprises a pressure reduction valve disposed between the valve assembly inlet port and the valve assembly outlet port and configured to reduce the pressure of breathable gas supplied at the valve assembly inlet port in use; and a flow control valve disposed between the pressure reduction valve and the valve assembly outlet port and having a flow adjuster. In use, the flow adjuster can be used to adjust the gas flow rate of the breathable gas delivered from the valve assembly outlet port.