Harvia Pro 20 SL Wood-Fired Sauna Heater

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The Harvia Pro 20 SL Classic Wood-Fired Sauna Heater is a durable and practical heater designed for medium-sized sauna rooms, offering the convenience of loading firewood from an adjacent room or from outside the building. This setup helps keep the sauna space quiet, clean, and free from ash or wood debris during use.

Built with Harvia’s trusted craftsmanship, the Pro 20 SL features a large stone compartment holding up to 88 lb (40 kg) of stones, paired with a 10 mm thick fire chamber cover for added strength and efficient heat retention. This construction supports steady, long-lasting heat throughout each sauna session. A cast-iron framed glass door allows the fire to remain visible from the loading side, adding warmth and visual appeal while maintaining practical operation.

Installation is straightforward thanks to adjustable legs, which provide stability on uneven floors and assist with proper chimney alignment. The reversible door hinge offers additional flexibility to suit different layouts, while the graphite black steel casing gives the stove a clean, modern appearance that fits seamlessly into a variety of sauna designs.

For added functionality, the Pro 20 SL can be paired with a chimney-mounted water tank (sold separately), allowing water to be heated while the sauna is in use.

Please note: Chimney pipe not included. Sauna stones sold separately.

Key Features

• Stainless steel front and top surfaces for easy cleaning

• Chimney connection options on both the top and rear

• Adjustable feet for stable installation

• Graphite black steel housing

• Made in Finland

• Certifications: CE, EAC

• Warranty: Up to 3 years for residential use (2 years + 1 year with registration)

The Harvia Pro 20 SL is a reliable choice for sauna owners who want the performance of a wood-burning heater with the added convenience of external loading and long-term durability.

• Model: WKPR20SLM

• Recommended Sauna Room Size: 283–706 ft³ (8–20 m³)

• Stone Capacity: 88 lb (40 kg), Ø 10–15 cm

• Heater Dimensions: 17? W × (20? + 8.7?) D × 30? H (430 × 510 + 220 × 760 mm)