Being a Fin, I have had both wood and electric sauna stoves. Electric is slow, does not heat up as hot and is hard on your electric bill. It is also hard to find an electric stove that you can safely put water on the rocks. If you can't put water on the rocks then it is not a sauna. You can regulate the heat with a wood stove by the amount and type of wood you put in, also by the air draft. Wood stove is the way to go and get a hot water tank attachment.