As shown, the two channels are in a counterflow relationship with one another such that the fluid in moisture accepting fluid channel 920 enters the left side as shown with little or no humidity, and leaves on the right side with {HEAD ~ an increased level} of {TAIL ~ humidity} after having accepted water from the right to left flowing fluid in moisture donating fluid channel 910 
As shown , the two channels are in a counterflow relationship with one another such that the fluid in moisture accepting fluid channel 920 enters the left side as shown with little or no humidity , and leaves on the right side with { HEAD ~ an increased level } of { TAIL ~ humidity } after having accepted water from the right to left flowing fluid in moisture donating fluid channel 910
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