Men and women usually had separate sections; apart for the more modern Central baths and Suburban baths there was no separation between women and men. Usually they had an apodyterium (dressing room) used also as a tepidarium (for medium temperature baths), a frigidarium (for cold baths) and calidarium (for hot baths). The heating was guaranteed by a piping system in the walls and double floors, and from mobile braziers.