Harvia M3 SL 16.5kW Wood-Burning Sauna Stove
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Harvia | Traditional wood-fired sauna heating
Harvia M3 SL Wood-Burning Sauna Stove
The Harvia M3 SL brings traditional wood-fired heat to sauna rooms measuring approximately 212 to 459 ft³ (6 to 13 m³). Its through-wall firewood feed lets you tend the fire from an adjoining room or outside the building, keeping fuel handling out of the sauna.
With 16.5 kW output, a 30 kg stone capacity, and a glass firebox door, this Finnish-made stove combines classic sauna performance with a welcoming view of the flames on the loading side.
Key Features
Through-Wall Loading
Add firewood from a separate loading area while keeping the sauna door closed.
Traditional Sauna Steam
The stone bed provides a surface for producing authentic löyly when water is applied according to the manual.
A View of the Fire
The glass firebox door adds warm ambiance to the adjoining room or loading space.
Reversible Door Opening
The door opening direction can be changed to suit the loading-side layout.
Compact Sauna Fit
Designed for small and medium home saunas within the recommended adjusted room-volume range.
Classic Black Finish
A black steel body complements both traditional timber interiors and modern sauna designs.
Complete Your Stove Setup
Required Components
- Sauna stones: Approximately 66 lb / 30 kg of suitable 10 to 15 cm stones, sold separately. Order by total weight rather than box count.
- Chimney system: Compatible components for the 115 mm top flue connection, installed according to the manual and local requirements.
- Installation protection: Floor protection and wall-opening materials appropriate to your layout.
What's Included
- Harvia M3 SL wood-burning sauna stove
- Stove door and ash box
- Through-wall fire chamber extension
- Installation and operation manual
Review the linked warranty for applicable coverage, eligibility, and installation conditions.
Technical Specifications
| Model / SKU | Harvia M3 SL / WKM3SL |
|---|---|
| Power Output | 16.5 kW, wood-burning |
| Recommended Sauna Volume | Approximately 212 to 459 ft³ / 6 to 13 m³, adjusted volume |
| Maximum Stone Capacity | 30 kg / approximately 66 lb; stones sold separately |
| Recommended Stone Size | 10 to 15 cm / approximately 4 to 6 inches |
| Dimensions (W × D × H) | 390 × 650 × 710 mm Approximately 15.35″ × 25.59″ × 27.95″ |
| Net Weight | 48 kg / approximately 105.8 lb, without stones |
| Installation | Floor-standing, with through-wall firewood feed |
| Flue Connection | Top connection; 115 mm diameter |
| Finish / Body | Black steel; glass firebox door |
| Certifications | CE / EAC, as listed by Harvia |
| Origin | Made in Finland |
| Warranty | Harvia limited warranty; review applicable terms in the linked document. |
Confirm the supplied stove's installation manual when planning the wall opening, clearances, chimney, and floor protection.
Plan Your Through-Wall Installation
- Size the sauna: Account for room construction and uninsulated surfaces when calculating adjusted volume.
- Plan both sides of the wall: Allow space for the stove, loading door, fuel handling, and maintenance.
- Review floor support: Include the stove, stone load, and chimney components.
- Follow the manual: Have your installer verify wall-opening construction, fire protection, ventilation, and flue requirements.
Product Manuals and Warranty
Review the M-series installation instructions and M3 SL technical details before planning your project.
Plan Your M3 SL Sauna Setup
Need help with room compatibility, stone selection, or through-wall installation planning? Our sauna specialists can help you prepare your M3 SL purchase.
Why Buy From Us
Shop trusted wellness brands with authorized dealer support and help choosing the right equipment.
Help understanding coverage and coordinating warranty inquiries. Coverage and registration requirements vary by brand and product.
Personal guidance from My Luxury Home Spa before, during, and after your purchase.
Ordering & Product Support FAQs
Shipping & Delivery
Free standard shipping is available on eligible products and destinations. Large equipment generally ships by freight with curbside delivery unless another service is expressly included.
White-glove placement, assembly, or other upgraded services may be available for select products and locations at an additional cost. Availability, scope, and pricing must be confirmed before booking. Processing, transit, and delivery scheduling vary by product and destination.
Review our Shipping Policy, or contact us before ordering if you need placement assistance or delivery by a particular date.
Warranty
Manufacturer warranty coverage varies by brand, model, component, and intended use. Review the product’s warranty documentation for coverage periods, exclusions, and any registration requirements. Commercial use may have different terms.
For warranty assistance, contact My Luxury Home Spa with your order number, model, serial number, and a description of the issue. We can help coordinate the next steps with the manufacturer or supplier.
Returns
Return eligibility, deadlines, fees, and shipping responsibilities vary by product. Some products have shorter return windows or specific restrictions. Eligible change-of-mind returns generally require unused equipment in its original packaging and written authorization before shipment.
Review our Return & Refund Policy and any product-specific terms before purchasing. Contact us promptly about damaged, defective, or incorrect items; these are reviewed separately from change-of-mind returns.
Installation & Power
Electrical, assembly, foundation, ventilation, drainage, and clearance requirements vary by product. Check the exact model’s specifications and manufacturer instructions before ordering or preparing your space.
Use qualified professionals where required. Delivery or optional placement service does not include electrical wiring, plumbing, site preparation, or full installation unless expressly included in your written service scope. Contact us if you need help locating the appropriate product documentation.
