The Harvia M3 is a 16.5 kW wood burning sauna stove for small to medium-sized cabins of 212 to 459 cubic feet, and its wood-fired design makes it a practical fit for off-grid outdoor sauna builds. The stove keeps a classic, traditional look with a black finish, and its tempered glass door lets bathers watch the fire and adds a warm glow to the room.
An optimized airflow system spreads warmth evenly and supports efficient fuel consumption. The M3 stands on adjustable legs for stability, and an ash box makes routine maintenance easier. Harvia specifies a minimum of 66 lbs of sauna stones, with two boxes of AC3020 recommended and a stone size of 4 to 8 inches. The flue connection is 115mm, so standard North American installations require a 6" adapter. A detailed installation and operation manual is included, and the stove is CE marked and tested to EN 15821:2010, the European standard for multi-firing sauna stoves.