Harvia Linear 22 Protective Sheath (side & Rear)Harvia Linear 22 Protective Sheath (side & Rear) The Harvia WL575 protective sheath is designed and approved for wood heated Harvia stoves (Harvia 22 Linear 22). 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