Harvia Pro 36 Duo Pro Series, 31kW, Wood Sauna Stove

The Harvia Pro 36 Duo is a 31kW wood-burning sauna stove designed as a versatile 2-in-1 heating solution for large sauna installations. Combining a wood-burning sauna heater with a fireplace, the Pro 36 Duo allows heat to be enjoyed across two rooms while maintaining a traditional wood-fired sauna experience. It is designed for sauna rooms ranging from 494 to 1,271 cubic feet and accommodates up to 132 lbs of sauna stones, with three boxes required and sold separately. The stove features a durable steel construction with a high-quality stainless steel outer casing and a large steel-framed glass door. Adjustable feet provide installation flexibility, while the top flue connection supports the specified installation configuration. The Pro 36 Duo accommodates firewood up to 15.3 inches long and wood with a diameter of 3–6 inches. Measuring 20 inches wide, 31 inches deep, and 32 inches high, the stove weighs 176.4 lbs and is designed, engineered, and made in Finland.

Key Features

• 31kW Wood-Burning Heating – Designed for large sauna rooms from 494–1,271 cu. ft.

• 2-in-1 Design – Combines a wood-burning sauna heater and fireplace to heat two rooms.

• 132 lb Stone Capacity – Requires 3 boxes of sauna stones , sold separately.

• Steel Construction – Built with a durable steel heater body.

• Stainless Steel Outer Casing – Provides a durable, refined exterior.

• Large Glass Door – Steel-framed design provides a clear view of the fire.

• Adjustable Feet – Floor-mounted design with adjustable legs for installation flexibility.

• 15.3" Maximum Firewood Length – Accommodates logs up to 15.3 inches long.

• 3–6" Firewood Diameter – Designed for firewood measuring 3–6 inches in diameter.

• Top Flue Connection – Flue connection is located at the top.

• Large Sauna Capacity – Suitable for sauna rooms up to 1,271 cu. ft.

• Made in Finland – Designed, engineered, and made in Finland.

• Dimensions – 20"W × 31"D × 32"H.

• Heater Weight – 176.4 lbs.

• Warranty – Limited 1-year warranty for consumer and commercial use.