An airplane leading edge de-icing apparatus having a heat diffuser for heating the leading edges of an airplane is provided. The heat diffuser has a first heat diffuser side having a concave shape and a second heat diffuser side having a convex shape. The heat diffuser is joined to the leading edge of an airplane. A counter current heat exchanger is provided and heats a heat transfer fluid with heat energy absorbed from hot gases. The heat transfer fluid is pumped in and out of a reservoir tank with a first pump. A second pump pumps the heat transfer fluid in and out of the heat diffuser. The heat energy in the heat transfer fluid housed in the heat diffuser is transferred to the convex surface of the second heat diffuser side and prevents and/or melts ice build-up.