of heating tower cells 14 as depicted in fig7 the air inlet duct 302 is preferably rectangular in shape having two end sections 304 and a middle section 306 each of the sections include opposing top and bottom walls connected to two opposing side walls 310 though an air inlet duct 302 having a generally rectangular geometry is depicted inlet ducts 302 of varying geometries may be employed in the illustrated embodiment the air inlet duct defines a dual air flow inlet 312 for the heating tower 300 which and functions to isolate the air inlet 312 from the heating tower air outlets of the individual heating tower cells 14 during operation of the heating tower 300 air is pulled into the heating tower 300 through the heating tower cells viaducts 302 as indicated by arrows g the air proceeds to flow into the wets sections of the respective heating tower cells 14 where the heat exchange occurs similar to the embodiments depicted in fig1 6 as the air flows through the wet sections it imparts its heat upon the falling liquid and the air temperature significantly becomes cooler the cold air or effluent then proceeds to exit each of the individual heating tower cells 14 through the stack 303 of the individual cells 14 as indicated by arrow g u2032 during the aforementioned operation of the heating tower 300 the air flow inlet duct 302 functions to isolate the inlet airflow entering the individual heating tower.