Systems, devices, and methods are disclosed herein for ultraviolet saunas. Systems include a plurality of walls of an enclosure, the enclosure being a sauna enclosure configured to accommodate a user. The systems further include a plurality of heating elements coupled to the plurality of walls, a plurality of emissive elements configured to generate ultraviolet (UV) light, and a controller coupled to the plurality of heating elements and the plurality of emissive elements. The controller includes one or more processors configured to generate activation properties for each of the plurality of heating elements and the plurality of emissive elements, activate at least one of the plurality of heating elements based on the plurality of activation properties, and activate the at least one emissive element based on the plurality of activation properties.