Do you desire the warmth, earthy aroma, and genuineness of a classic wood-burning sauna with a Sauna heater? All wood-burning saunas can only be used outside. As long as you have the correct connections, you can use a traditional sauna with an electric stove both inside and outside. Or perhaps you like the calmer, less jarring atmosphere of an infrared sauna? If so, you should only install your infrared sauna inside.