Harvia 20 DuoEnjoy the best of both worlds with the innovative and versatile Harvia 20 Duo. Both a wood fired sauna stove and a fireplace! A unique solution to heating two rooms with one stove. Relax in an intense, steamy sauna room, then move to the next room to enjoy the warm glow of a fireplace. The Harvia 20 Duo lets you load wood into the sauna stove from an adjoining room so you don't need to bring messy cordwood into your sauna. Harvia wood fired sauna