A vapor transfer cartridge comprising: a center tube (116, 316) extending along a first axis from a first end to a second end, having a continuous inner diameter throughout; a first header piece (118, 318) coupled to the first end of the center tube, the first header piece configured as a cap and comprising: a first channel (130, 230) about an inner circumference of the first header piece (118,318), the first channel (130, 230) accepting the first end of the center tube (116,316) to couple the first header piece (118, 318) to the center tube (116, 316), a first port (122,222) providing a water inlet into the vapor transfer cartridge, and a baffle disposed inside the vapor transfer cartridge at the first port (122, 222), a second header piece (120, 320) coupled to the second end of the center tube the second header piece (120, 320) configured as a cap and comprising: a second channel about an inner circumference of the second header piece (120, 320), the second channel accepting the second end of center tube (116, 316) to couple second header piece (120, 320) to center tube (116, 316), a second port (124, 224), a first end cap (140, 340) coupled to the first header piece (118, 318), the first end cap (140, 340) comprising a third port (144, 344), a second end cap (142, 342) coupled to the second header piece (120, 320), the second end cap (140, 340) comprising a fourth port (146, 346); and a plurality of fibers arranged inside the center tube (116, 316) along the axis of the center tube from the first end to the second end. a center tube (116, 316) extending along a first axis from a first end to a second end, having a continuous inner diameter throughout; a first header piece (118, 318) coupled to the first end of the center tube, the first header piece configured as a cap and comprising: a first channel (130, 230) about an inner circumference of the first header piece (118,318), the first channel (130, 230) accepting the first end of the center tube (116,316) to couple the first header piece (118, 318) to the center tube (116, 316), a first port (122,222) providing a water inlet into the vapor transfer cartridge, and a baffle disposed inside the vapor transfer cartridge at the first port (122, 222), a first channel (130, 230) about an inner circumference of the first header piece (118,318), the first channel (130, 230) accepting the first end of the center tube (116,316) to couple the first header piece (118, 318) to the center tube (116, 316), a first port (122,222) providing a water inlet into the vapor transfer cartridge, and a baffle disposed inside the vapor transfer cartridge at the first port (122, 222), a second header piece (120, 320) coupled to the second end of the center tube the second header piece (120, 320) configured as a cap and comprising: a second channel about an inner circumference of the second header piece (120, 320), the second channel accepting the second end of center tube (116, 316) to couple second header piece (120, 320) to center tube (116, 316), a second port (124, 224), a first end cap (140, 340) coupled to the first header piece (118, 318), the first end cap (140, 340) comprising a third port (144, 344), a second end cap (142, 342) coupled to the second header piece (120, 320), the second end cap (140, 340) comprising a fourth port (146, 346); and a second channel about an inner circumference of the second header piece (120, 320), the second channel accepting the second end of center tube (116, 316) to couple second header piece (120, 320) to center tube (116, 316), a second port (124, 224), a first end cap (140, 340) coupled to the first header piece (118, 318), the first end cap (140, 340) comprising a third port (144, 344), a second end cap (142, 342) coupled to the second header piece (120, 320), the second end cap (140, 340) comprising a fourth port (146, 346); and a plurality of fibers arranged inside the center tube (116, 316) along the axis of the center tube from the first end to the second end.