Practical, relatively simple methods are presented to enhance heat transfer with condensation in a compact, polymer plate heat exchanger. Tilting the exchanger, while adapting the spacers, increases the condensate and heat fluxes by 6-8%, as a function of the inlet mass fraction of the moist air at ambient conditions. Polymer inserts increase convective heat transfer and yield a total heat flux improvement of 20%, at the cost of increased pressure drop.