Harvia M3 SL 16.5KW Wood Sauna Stove with Sauna Stones [WKM3SL]

The Harvia M3 SL 16.5KW Wood Sauna Stove is a premium wood-burning sauna heater designed to deliver authentic Finnish sauna heat while adding warmth and ambiance to an adjoining room. Engineered with a practical through-wall design, this innovative stove allows you to load firewood from outside the sauna, helping keep your sauna space cleaner while creating a cozy fireplace-style atmosphere in your changing room, lounge, or adjacent space.

Designed, engineered, and manufactured in Finland, the Harvia M3 SL combines traditional sauna performance with durable craftsmanship and elegant visual appeal. Its large cast-iron framed glass door offers a beautiful view of the flames, turning the heater into a striking focal point while allowing you to monitor the fire with ease. With 16.5kW of heating power, this stove is well suited for sauna rooms ranging from 212 to 459 cubic feet, delivering strong and consistent heat throughout your session.

Built for users who value both performance and convenience, the Harvia M3 SL offers the classic experience of wood-fired sauna bathing without bringing bark, ash, and wood debris into the sauna room itself. Its generous stone capacity supports a traditional steam experience, while the through-wall design helps create a more refined and comfortable overall sauna environment.

Key Features

• Through-Wall Heating Design: Allows the stove to heat the sauna while being loaded from an adjoining room for added convenience and a cleaner sauna interior.
• Authentic Wood-Burning Sauna Heat: Delivers traditional sauna warmth, natural fire ambiance, and a more immersive heat experience.
• 16.5kW Heating Capacity: Provides reliable performance for sauna rooms ranging from 212 to 459 cubic feet.
• Large Glass Door: Cast-iron framed glass door creates a fireplace-style visual effect and adds warm ambiance to the adjoining room.
• Finnish Craftsmanship: Designed, engineered, and manufactured in Finland for trusted sauna quality and performance.
• Cleaner Sauna Environment: External loading design helps keep ash, bark, and wood debris out of the sauna room.
• Generous Stone Capacity: Designed to hold up to 66 lbs of sauna stones for traditional steam and lasting heat performance.
• Dual-Space Comfort: Heats the sauna while adding warmth and atmosphere to a nearby room or lounge area.

Ideal For

• Traditional wood-burning sauna installations.
• Sauna rooms with adjoining changing rooms or lounge spaces.
• Homeowners seeking an authentic Finnish sauna experience.
• Users wanting a cleaner sauna through external wood loading.
• Medium-sized sauna rooms requiring dependable wood-fired heat.

Specifications

• Product Type: Wood Sauna Stove.
• Model: Harvia M3 SL [WKM3SL].
• Heating Capacity: 16.5kW.
• Recommended Sauna Room Size: 212–459 Cubic Feet.
• Design: Through-Wall / External Feed.
• Door Type: Large Cast-Iron Framed Glass Door.
• Stone Capacity: Up to 66 lbs.
• Country of Manufacture: Finland.

Manuals & Resources

User Manual

Health & Safety Notice

This product is designed for relaxation, recovery, and general wellness use. It is not intended to diagnose, treat, cure, or prevent any medical condition. Consult your healthcare provider before use if you have medical concerns.

Returns are subject to a 25% restocking fee. See our Return Policy for full details.

Shipping Information

FREE USA SHIPPING. Your Harvia M3 SL 16.5KW Wood Sauna Stove [WKM3SL] will be packed and shipped within 1–3 business days and delivered within 5–10 business days.