Harvia 20 Duo Wood-Burning Sauna Stove

Experience the ultimate hybrid of traditional sauna culture and modern luxury with the Harvia 20 Duo. This innovative 2-in-1 solution functions as both a high-performance wood-burning sauna stove and an elegant fireplace. Designed to be installed through a wall, the Harvia 20 Duo allows you to heat your sauna from an adjacent room, transforming that space into a cozy lounge with the warm glow of a real fire, while providing a powerful, vigorous steam experience inside the sauna.

Crafted by the world's leading sauna manufacturer, the Harvia 20 Duo is the perfect centerpiece for medium-sized outdoor or indoor saunas.

Innovative Through-the-Wall Design

The Harvia 20 Duo is engineered for convenience and atmosphere. By feeding the fire from an external room or dressing area, you keep the sauna interior clean of wood debris and ash. The stove features a large, stylish glass door that creates a fireplace-like ambiance in your relaxation room, allowing you to enjoy the soothing sight of flickering flames while the sauna heats up.

Superior Steam and Durability

Built for performance, the Harvia 20 Duo features a high-quality stainless steel outer casing and a massive stone compartment. It holds up to 88 lbs (40 kg) of stones, ensuring a soft, consistent heat and plenty of robust steam (Loyly) whenever water is added. To ensure maximum longevity, the fire chamber cover is made of 10mm thick steel, designed to withstand the rigors of frequent, high-heat use.

Elegant and Functional Craftsmanship

The stove’s sleek stainless steel and black finish complement any modern or traditional sauna aesthetic. It is equipped with adjustable feet, making it easy to level the stove on uneven floors and ensuring a precise alignment with your chimney connection. For added versatility, the Harvia 20 Duo can be equipped with a pipe-mounted water heater, providing hot water for bathing as you heat the room.

Features

• 2-in-1 Hybrid: Functions as both a sauna heater and a stylish fireplace for the adjacent room.

• Through-the-Wall Operation: Conveniently load wood and clean ash from outside the sauna room.

• Large Glass Door: Robust, steel-framed glass door provides a clear view of the fire.

• Durable Construction: High-grade stainless steel casing and 10mm thick fire chamber cover.

• High Stone Capacity: Holds 88 lbs of stones for exceptional heat retention and steam.

• Adjustable Feet: Facilitates easy installation and height adjustment for chimney alignment.

• Versatile Connections: Includes an adapter to convert metric pipe sizes to standard 6" chimney pipe.

Specifications

• Heating Power: 24.1 kW (approx. 82,200 BTU).

• Sauna Room Size: 282 – 706 cubic feet (8 – 20 m³).

• Stone Capacity: 88 lbs (40 kg).

• Dimensions: 17" W x 20" D x 30" H (Extends an additional 11" through the wall).

• Weight: 169 lbs (approx. 77 kg) without stones.

• Smoke Outlet Diameter: 115 mm (adapter included).

• Maximum Firewood Length: 15.3" (39 cm).

• Warranty: Manufacturer's limited warranty included.

Required & Recommended Accessories

• Sauna Stones: High-quality rounded olivine diabase stones (approx. 2-3 boxes).

• Chimney System: Standard 6" stainless steel chimney kit (adapter included).

• Protective Bedding: Recommended for installation on combustible or waterproof tile floors.

• Pipe-Mounted Water Heater: Optional accessory to provide hot water during operation.