US Patent 12130097 Crossflow heat exchanger with stacked distribution tubes

A heat exchanger having: an inlet header having inlet tubes stacked against the first side of the heat exchanger; an outlet header having outlet tubes stacked against the second side of the heat exchanger, first inlet and outlet tubes have a same length as each other, second inlet and outlet tubes have the same length as each other and are longer than the first inlet and outlet tubes, and third inlet and outlet tubes have a same length as each other and are longer than the second inlet and outlet tubes; core channels extend from the first side to the second side of the heat exchanger, the core channels connect the inlet tubes to the outlet tubes such that: the first inlet tube and third outlet tube are connected; the second inlet tube and second outlet tube are connected; and the third inlet tube and first outlet tube are connected.