To provide heat exchanger elements which allow the creation of Enthalpy exchangers whereby the efficiency of sensible energy exchange and latent energy exchange can be varied and controlled and especially improved, a method for the production of heat exchanger elements is provided including a) producing a plate element with defined outer dimensions and corrugations in the area within a border, b) perforating the plate in predefined areas and in predefined dimensions, c) filling the perforations with a polymer with latent energy recovery capability and d) curing the polymer.