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A blower unit for use as part of an integrated blower/humidification system is described. The blower unit has an outer casing, which encloses and forms part of the blower unit, the casing including an air inlet vent. The blower unit further includes a humidifier compartment for receiving a humidifie

A blower unit for use as part of an integrated blower/humidification system is described. The blower unit has an outer casing, which encloses and forms part of the blower unit, the casing including an air inlet vent. The blower unit further includes a humidifier compartment for receiving a humidifier unit with a separate gases inlet and outlet, the compartment having a heater base for heating the contents of the humidifier unit. The compartment also has a blower inlet port which aligns with the humidifier unit inlet in use, the blower providing a gases path through the casing between the inlet vent and the inlet port. The blower unit also includes a fan for providing a pressurized gases stream along the gases path, and a power supply unit for powering the fan. The gases path is routed over the power supply unit in order to provide a cooling air flow.

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1. A humidifier unit for fitting within an enclosed compartment of an assisted breathing unit, the humidifier unit comprising a humidifier chamber that comprises a top surface with a top fill aperture, wherein the humidifier chamber is configured to be inserted into the enclosed compartment of the a

1. A humidifier unit for fitting within an enclosed compartment of an assisted breathing unit, the humidifier unit comprising a humidifier chamber that comprises a top surface with a top fill aperture, wherein the humidifier chamber is configured to be inserted into the enclosed compartment of the assisted breathing unit with the top fill aperture open, wherein an axis defined by a flow-through direction of the top fill aperture extends vertically through a centre of the top fill aperture to a bottom surface of the humidifier chamber such that a liquid is allowed to flow in a vertical direction through the top fill aperture to the bottom surface of the humidifier chamber, wherein the top fill aperture is configured to be at least partially closed by a member defining at least a portion of the enclosed compartment such that liquid is not allowed to flow in the vertical direction through the top fill aperture when the top fill aperture is at least partially closed by the member, the humidifier chamber comprising a wall sized to fit within the enclosed compartment of the assisted breathing unit, wherein the humidifier chamber comprises a gases inlet and a gases outlet separate from the gases inlet such that gas enters and exits the humidifier chamber when the humidifier chamber is disposed within the enclosed compartment of the assisted breathing unit, the humidifier unit further comprising at least one heat conducting surface that defines at least a portion of the bottom surface of the humidifier chamber. 2. The humidifier unit according to claim 1, further comprising: an inlet port and an outlet port in the wall; anda baffle supported in the humidifier chamber of the humidifier unit between the inlet port and the outlet port to prevent air that enters the humidifier chamber from the inlet port directly exiting the outlet port. 3. The humidifier unit according to claim 2, wherein the wall of the humidifier chamber is flattened to correspond with a ledge on a side of the enclosed compartment when the humidifier unit is placed in position in the enclosed compartment to align the inlet and outlet ports with corresponding ports in the enclosed compartment. 4. The humidifier unit according to claim 2, wherein the wall of the humidifier chamber is shaped to correspond with a structure on a side of the enclosed compartment when the humidifier unit is placed in position in the enclosed compartment to align the inlet and outlet ports with corresponding ports in the enclosed compartment. 5. An assisted breathing unit comprising: an outer casing comprising an enclosed humidifier compartment with a heater plate,a humidifier chamber that comprises a top surface with a top fill aperture, wherein, in use, an axis defined by a flow-through direction of the top fill aperture extends vertically through a centre of the top fill aperture to a bottom surface of the humidifier chamber, wherein the humidifier chamber is configured to be inserted into the enclosed humidifier compartment with the top fill aperture open such that a liquid is allowed to flow in a vertical direction through the top fill aperture to the bottom surface of the humidifier chamber, wherein the top fill aperture is configured to be covered by a member defining at least a portion of the enclosed humidifier compartment such that liquid is not allowed to flow in the vertical direction through the top fill aperture when the top fill aperture is covered by the member, wherein the humidifier chamber comprises a gases inlet and a gases outlet separate from the gases inlet such that gas enters and exits the humidifier chamber when the humidifier chamber is disposed within the enclosed humidifier compartment of the assisted breathing unit, the humidifier chamber further comprising at least one heat conducting surface that defines at least a portion of the bottom surface of the humidifier chamber and a wall sized to fit within the enclosed humidifier compartment. 6. The assisted breathing unit according to claim 5, further comprising: an inlet port and an outlet port in the wall of the humidifier chamber positioned for aligning with corresponding ports in the enclosed humidifier compartment of the assisted breathing unit; anda baffle supported in the humidifier chamber between the inlet port and outlet port to prevent air that enters the humidifier chamber from the inlet port directly exiting the outlet port. 7. The assisted breathing unit according to claim 6, wherein the wall of the humidifier chamber is flattened to correspond with a ledge on a side of the enclosed humidifier compartment when the humidifier chamber is placed in position to align the inlet and outlet ports of the humidifier chamber with the corresponding ports in the enclosed humidifier compartment. 8. The assisted breathing unit according to claim 5, further comprising a lid to enclose and retain the humidifier chamber in the enclosed humidifier compartment. 9. The assisted breathing unit according to claim 8, further comprising: an inlet port and an outlet port in the wall of the humidifier chamber positioned for aligning with corresponding ports in the enclosed humidifier compartment of the assisted breathing unit; anda baffle supported in the humidifier chamber between the inlet port and outlet port of the humidifier chamber to prevent air that enters the humidifier chamber from the inlet port directly exiting the outlet port of the humidifier chamber. 10. The assisted breathing unit according to claim 9, wherein the wall of the humidifier chamber is flattened to correspond with a ledge on a side of the enclosed humidifier compartment when the humidifier chamber is placed in position to align the inlet and outlet ports of the humidifier chamber with the corresponding ports in the enclosed humidifier compartment. 11. The assisted breathing unit according to claim 8, wherein the lid is lockable into a closed position. 12. The assisted breathing unit according to claim 11, further comprising: an inlet port and an outlet port in the wall of the humidifier chamber positioned for aligning with corresponding ports in the enclosed humidifier compartment of the assisted breathing unit; anda baffle supported in the humidifier chamber between the inlet port and outlet port of the humidifier chamber to prevent air that enters the humidifier chamber from the inlet port directly exiting the outlet port of the humidifier chamber. 13. The assisted breathing unit according to claim 12, wherein the wall of the humidifier chamber is flattened to correspond with a ledge on a side of the enclosed humidifier compartment when the humidifier chamber is placed in position to align the inlet and outlet ports with the corresponding ports in the enclosed humidifier compartment. 14. A humidifier unit adapted for use in conjunction with an assisted breathing unit comprising a heater plate, the humidifier unit comprising: a humidifier chamber that has an open top fill aperture, a wall, and a base that is adapted to contact said heater plate in use, said humidifier chamber having a gases inlet and a gases outlet that is separate from the gases inlet, wherein the humidifier chamber is configured to be inserted into the assisted breathing unit with the top fill aperture open, wherein a lid is configured to cover the entire top of the humidifier chamber after the humidifier chamber is inserted into the assisted breathing unit;an elongate entry passage extending from said gases inlet, said elongate entry passage having a first opening in an end of said elongate entry passage, an elongate exit passage extending from said gases outlet, said elongate exit passage having a second opening in an end of said elongate exit passage, said first and second openings aligned to face upwards,a baffle located between said first and second openings and adapted to prevent gases that enter said humidifier chamber from said elongate entry passage from directly entering said elongate exit passage. 15. A humidifier unit for fitting within an enclosed compartment of an assisted breathing unit, the humidifier unit comprising: a humidifier chamber that defines a cavity, the humidifier chamber comprising a heat conductive lower surface, the heat conductive lower surface being configured such that during use heat is transferred from a heater base into a body of liquid contained within the cavity defined by the humidifier chamber, a side wall extending upwardly from the heat conductive lower surface, at least one gases flow path extending through the side wall and the humidifier chamber including an orienting surface that guides a desired orientation between the humidifier chamber and the enclosed compartment, the orienting surface extending along at least half of a total vertical height of the humidifier chamber,a removable lid overlying the humidifier chamber, wherein the humidifier chamber is configured to be inserted into the assisted breathing unit with the lid removed, wherein the removable lid is configured to cover the entire top of the humidifier chamber after the humidifier chamber is inserted into the assisted breathing unit such that liquid is not allowed to flow in a vertical direction when the removable lid is overlying the humidifier chamber. 16. The humidifier unit of claim 15, further comprising a latching component, wherein the latching component comprises a handle. 17. The humidifier unit of claim 15, wherein the at least one gases flow path extending through the side wall is offset towards a front corner of the humidifier unit when the humidifier chamber and the enclosed compartment are in the desired orientation for use. 18. The humidifier unit of claim 17, wherein the at least one gases flow path that extends through the side wall comprises a gases inlet and a gases outlet extends out of the humidifier chamber, the gases outlet extending at an angle relative to the gases inlet. 19. The humidifier unit of claim 18, wherein the gases inlet and the gases outlet extend in a horizontal direction. 20. The humidifier unit of claim 19, wherein the gases inlet and the gases outlet are separated by a baffle.