Smoke Pipe, Sauna Wood Stove, 1m, 115mm The Harvia Smoke Pipe WZ has a CE certification that ensures the safety of your stove. This 1m smoke pipe is compatible with all Harvia Sauna Stoves, except for the Harvia 50. Black and stainless steel finishes available CE certificationensures the safety of your stove Compatible with all Harvia Sauna Stoves except Harvia 50