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Fans and Resistances Park in Drying Technologies Appropriate for Tropical Environment. To design a dryer, it is necessary to master its elements. Fan and resistance are parts of heated and convective dryer. Catalogues analysis of 33 and 14 french suppliers of fans and resistances respectively showed 773 fans and 226 resistances suitable for drying technologies. Fans are classified as follows in decreasing order : axial (58 %), centrifugal (42 %) and tangential (1 %). Specifications of fans used in pilots dryers adapted for developing countries in the literature are presented. Centrifugal fan appeared to be the most used. Optimisation of fan parameters (rating fan, air circulation) are presented as a function of drying time.