The Harvia M3 SL offers the authentic warmth of a traditional wood-fired sauna with the convenience of through-the-wall heating. Perfect for small to medium-sized saunas, it allows you to heat the sauna comfortably from an adjoining room or outdoor area.

The reversible glass door showcases the natural glow of the fire while providing flexible installation options. Compact and efficient, the M3 SL delivers smooth, even heat and efficient air circulation for a balanced sauna environment.

Finished in graphite black with stainless steel detailing, this model combines functionality and timeless design. It can also be equipped with an optional pipe model water heater for added versatility.

Designed and crafted in Finland, the Harvia M3 SL blends practicality, performance, and traditional sauna aesthetics into one durable, easy-to-use heater.

Features

• Heats two rooms
• Wood-burning stove
  
• Heater and fireplace
• 16.5 kW
• For sauna rooms from 212 to 459 cu. ft.
• Requires a minimum of 66 lb of stones (2 boxes-AC3020)
• Cast-iron-framed glass door
  
• Floor model
• upper connection opening
• soot opening
• Designed, engineered, and made in Finland
  
• 2-year warranty

Specifications

What's Included

• Sauna Stove
  
• Stove Door
• Ash Box
  
• Fire chamber extension
• Installation and Operation Manual

Complete Your Setup

To install and operate this wood stove safely, the following components are needed:

Required for Operation

• Sauna Stones —66 lb required (2 boxes)
  • Harvia AC3020
• Compatible Chimney Kit (select one option)
  • Harvia Stainless Steel Sauna Wood Stove Chimney Kit | WHP1500
  • Harvia Black Sauna Wood Stove Chimney Kit | WHP1500M
  • Harvia Stainless Steel Chimney & Assembly Kit, Barrel, Flat Roof
  • Harvia Black Chimney & Assembly Kit, Barrel, Flat Roof
• Chimney Extension (if needed based on roof height)
  • 500mm — Stainless Steel (WHP500) / Black (WHP500M)
  • 1000mm — Stainless Steel (WHP1000) / Black (WHP1000M)

Safety & Installation Accessories

• Harvia M Series Protective Sheath | WL450
• Harvia Sauna Floor Protective Bedding | WL100
• Harvia Chimney Pipe Adapter | WZ115155

Optional Add-Ons

• Harvia AC4000 Decorative White Sauna Stones
• Harvia Stainless Steel Water Tank Heater | WP220ST

Manuals & Resources