Harvia Extension For Chimney WHP1000 mmDescription The Harvia stainless steel chimney kit is suitable for all Harvia wood stoves except the Harvia 50. The WHP1500 chimney kit comes with a 1. 5 m insulated chimney pipe, 1 m non insulated stainless smoke pipe, clamps, lead through the flange, lead through the insulation with protector, rain flange kit, and rain cap. 1 m and . 5 m chimney extensions may be ordered separately. Inside the chimney, the height may be 3 m high unsupported, and the