Harvia M3 SL Wood-Burning Sauna Stove | 16.5 kW Through-Wall Feed (WKM3SL)

Built for these

• 

  Harvia Sauna Rocks (can only be purchased with heater)
  Required, not included. Harvia's stone chart gives 66 lb of 4–6 in AC3020 for a 16.5 kW M SL, two 44 lb boxes. We recommend an extra box so you can choose stones for fit, form and function. See the full product and build your package →

• 

  Harvia WL450 – Protective Shield for M1, M2, M3, and M3 SL
  The model-specific sheath. The WKM3SL data sheet gives 9.9 in to combustible material at the sides; our WL450 page publishes B 2 in / C 2 in / D 11.9 in with the shield fitted. See the full product and build your package →

• 

  Harvia WP220ST Pipe-Model Water Heater | 22 L Stainless Steel
  A 22 L stainless tank that sits on top of the stove with the smoke pipe running through it. Harvia states it is compatible with all wood-heated Harvia stoves except the Harvia 50, and this stove has the top flue connection it needs. See the full product and build your package →

• 

  Harvia WZ Smoke Pipe, 4.6 in, for Wood-Burning Sauna Stoves (7.9 in, 19.7 in, 3.3 ft)
  Matching 4.6 in flue sections in 7.9 in, 19.7 in and 3.3 ft, the chimney connection diameter on this stove's data sheet. See the full product and build your package →

What’s included

• Sauna stove
• Stove door
• Ash box
• Fire chamber extension
• Installation and operation manual

Every wood-fired sauna has the same nuisance: the fire wants tending and the hot room is where you are trying to sit still. The SL models solve it structurally. In Harvia’s words, they are “designed for people who want to conveniently heat their sauna from another room or outside the building”, and “the opening direction of the door can be changed, making these heaters even easier to use”. The stove body stays in the sauna; its fire chamber extension passes through an opening in a non-combustible wall so the door lands in the next room.

Installation, in Harvia’s words

• “Detach the hinge pin and door from the stove. Push the fire chamber extension through the opening far enough to allow attachment of the door.”
• Connected to a Harvia steel chimney: “The nonflammable wall through which the stove is installed must extend up to the roof. NOTE! Does not apply to thin nonflammable wall structures that allow to install steel chimney far enough from the wall (for example Harvia Duo glass wall).”
• “The safety distance between the inflammable structures and the chimney outer casing must be minimum 4 in.”
• Minimum safety distance to combustible material at the front, for SL models: 19.7 in.
• Floor protection: “Floor in front of the stove door is made of inflammable material. Install floor protection made of nonflammable material.”
• Place firewood on the grate at the back of the fire chamber: Harvia asks you to avoid burning firewood in the fire chamber extension, and not to use excessively long firewood even though it would fit.
• Minimum room height 74.9 in.

Specifications

Common questions

Do I need to add rocks, or does the stove already come with them?

Sauna stones are not included with the Harvia M3 SL and are ordered separately. Harvia's heater and stone chart calls for a minimum of 66 lb of 4–6 in stones for a 16.5 kW M SL, which is two 44 lb boxes of AC3020, and the WKM3SL data sheet gives the same 66.1 lb at Ø4–6 in. We recommend an extra box, because each natural stone is a different shape and size and the spare lets you choose for fit, form and function. What is in the carton is the stove, the stove door, the ash box, the fire chamber extension and the installation and operation manual.

Often bought with the Harvia Sauna Rocks (can only be purchased with heater)

What customers building this room most often add alongside it.

• Harvia M3 Wood Fired Sauna Stove
• The Wall Electric Sauna Heater by Harvia
• SaunaLife EE6G 4-Person Barrel Sauna with Back Wall Benches
• Harvia Fenix Upgraded Sauna Controller
• PROSAUNAS Thermo-Spruce 1X4 T&G STS4 Wall Cladding – Sauna Wood
• PROSAUNAS Thermo-Spruce 2X4 S4SEE SHP Bench, Backrest & Skirting – Sauna Wood