Harvia M3 Wood Burning Sauna Stove - WKM3

Harvia M3 Wood Burning Sauna Stove - WKM3

Craving the authentic warmth of a traditional wood-burning sauna? Discover the Harvia M3 available at My Sauna World, and transform your sauna experience. With effortless purchasing and easy installation, this stove blends classic design with modern efficiency, delivering an unmatched sauna experience in your home. Harvia’s legacy of quality and innovation ensures you’re investing in superior craftsmanship. Embrace the  of regular sauna use—like improved muscle recovery, stress reduction, and better sleep—and join a global community dedicated to holistic wellness with the Harvia M3 as a key part of your journey. 

What our Experts Think

• Best-selling classic Finnish wood heater
  The Harvia M3 (WKM3) is a 16.5kW wood-burning sauna stove designed for small to medium sauna rooms (~212–459 cu. ft.), known for its reliable, traditional Finnish sauna performance.
• Authentic wood-fired sauna experience
  Delivers natural radiant heat + real flame ambiance, creating the classic “cabin sauna” feel that electric heaters can’t fully replicate.
• Efficient heat for small sauna spaces
  Engineered for fast, even heating and good air circulation, making smaller saunas feel warm and comfortable without hot spots.
• Balanced stone-based steam (löyly)
  Holds about 66 lbs (30 kg) of sauna stones, producing soft, consistent steam bursts when water is thrown on heated stones.
• Compact, space-friendly design
  Slim footprint (about 15" wide) allows installation in tight sauna layouts while still delivering strong heating performance.
• Fire-viewing atmosphere upgrade
  Features a glass door with visible flame, adding ambiance and making the sauna experience more immersive and relaxing.
• Durable Finnish construction
  Built with steel body and cast-iron framed components, designed for long-term wood-fired use in demanding sauna environments.
  

Q&A

Maintenance Tips

• Empty ash box after every use: Improves airflow, speeds up ignition, and protects the fire grate from overheating and wear.
• Clean ash & soot channels regularly: Prevents buildup in smoke paths and keeps heat output stable and efficient.
• Sweep chimney and flue frequently: Essential for safety—removes creosote, improves draft, and prevents smoke backflow or fire risk.
• Re-stack sauna stones annually: Stones naturally crack from heat cycles; replace damaged ones and keep loose spacing for proper airflow and strong steam (“löyly”).
• Use only dry, seasoned wood: Wet wood reduces heat, increases smoke, and accelerates soot buildup in the stove and chimney.
• Maintain correct airflow during burning: Ensure air vents/ash drawer are properly adjusted for clean combustion and efficient heating.
• Inspect fire chamber & body: Check for rust, cracks, or burn-through areas during seasonal maintenance for safety and longevity.
• Wipe exterior after cooling: Removes ash dust and moisture, helping prevent corrosion in humid sauna environments.
• Check chimney draft performance: Poor draft usually signals blockage or insufficient air intake—fix early to avoid smoke issues.

• Harvia M3 Heater Manual

  Harvia M3 Safety Shield Installation Manual

  Chimney Installation Guide