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