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Many solvent evaporators are routinely sited inside fume extraction hoods because residual solvent vapour, remaining in the chamber at the end of a run, can expose the operator to unwelcome, and potentially harmful, odours when the system is opened. In many cases these situations can be improved significantly by simple changes in programming . “Odour reduction” adds a repeated vent and vacuum cycle to the end of a method, which purges the evaporation chamber of residual solvent vapours. Utilisation of this function may enable the evaporator to be sited on the open bench rather than taking up valuable fume hood space.