Harvia Linear WL425 16 Protective Sheath (side)Harvia Linear WL425 16 Protective Sheath (side) The Harvia WL425 protective sheath is designed and approved for wood heated Harvia stoves (Harvia 16 Linear 16). The protective sheath considerably reduces the safety distance to combustible materials in practice, this makes the stove fit in a smaller space. The protective sheath is attached to the stove and conforms to the shape of the stove, making the combination sleek. As the Harvia protective