Steam hairstyling appliance having a reduced-size base

A steam appliance intended to style hair, includes: -a base having a fluid reservoir including a component for demineralizing the fluid that is arranged upstream of the reservoir, -an intermediate chamber for raw fluid, the intermediate chamber being arranged upstream of the demineralizing component, -a cover intended to closed the intermediate chamber, -a portable unit for styling the hair, the unit being remote from the base and having a component for outputting steam in the direction of the hair, -a line including at least one duct intended to put the base and the portable unit into fluid communication, -a component for vaporizing the fluid and a component for outputting steam in the direction of the hair. The intermediate chamber includes in its interior a splitter intended to increase the flow cross section of the fluid through the inlet of the demineralizing component.