Word History: The word stove first referred not to a cooking or heating device but to a room for taking a hot-air or steam bath (first recorded in 1456).
I'm not sure if I was going to a spa (and I've been to quite a few) I'd like the idea of sitting in a stove! Perhaps the idea is that you're in a dry heat area? Try looking at this http://spas.about.com/od/spaglossary/g/laconium.htm
Si pero en el mismo artículo dice: Sauna, Estufa, Baño Turco etc. entonces no puede ser! También dice "estufa de vapor".. steam room? ... Stove - no sé, es que nunca he oído eso en inglés (y soy escosés)