The Harvia 36 Duo is a wood-burning sauna stove and open-flame fireplace combined into a single floor-standing unit. Designed for larger sauna rooms between 494 and 1,272 cubic feet, it delivers the authentic heat and atmosphere of a traditional wood-fired sauna while offering the visual warmth of a real fire through its large glass door. Built with a high-quality stainless steel outer casing and a steel-framed glass door, the Duo is engineered for durability and long-term performance. An optional pipe-mounted water heater can be added for those who want hot water integrated into their sauna setup.
Why Customers Choose the Harvia 36 Duo
- Two functions in one unit: wood-burning sauna heater and fireplace with visible flame
- Heats large sauna rooms from 494 to 1,272 cubic feet
- High-quality stainless steel construction for lasting durability
- Large steel-framed glass door for an open-fire aesthetic
- UL Listed for safety compliance in the US and Canada
- Compatible with an optional pipe-mounted water heater
- Made in Finland by Harvia, a trusted sauna equipment manufacturer
Product Highlights
Wood-Burning Heater and Fireplace in One
The Duo's dual-function design lets you heat your sauna to bathing temperature while enjoying the ambiance of a visible wood fire — a combination that enhances the traditional sauna experience.
Large Room Capacity
Rated for sauna rooms between 494 and 1,272 cubic feet, the 36 Duo is well-suited for spacious home saunas and custom sauna builds that require substantial heating output.
Stainless Steel Construction
The outer casing is made from high-quality stainless steel, providing resistance to heat, moisture, and corrosion for reliable performance over many years of use.
Large Glass Door
The steel-framed glass door provides a clear view of the fire, adding a visual element to the sauna environment while maintaining the structural integrity of the stove.
Optional Water Heater Compatibility
The Duo can be equipped with a pipe-mounted water heater, allowing you to integrate a hot water source directly into your sauna setup without a separate appliance.
UL Listed
The Harvia 36 Duo carries UL Listing, confirming it has been independently tested and meets recognized safety standards for residential use in the United States and Canada.
Specifications
| Model | Harvia 36 Duo |
|---|---|
| Fuel Type | Wood Burning |
| Installation Type | Floor Standing |
| Room Size (Min) | 494 cubic feet |
| Room Size (Max) | 1,272 cubic feet |
| Width | 21" (533 mm) |
| Depth | 21" (533 mm) |
| Height | 32" (813 mm) |
| Weight | 300 lbs |
| Outer Casing | High-quality stainless steel |
| Door | Steel-framed glass |
| Stones Required | 4 boxes (not included) |
| Water Heater | Optional pipe-mounted (sold separately) |
| Certifications | UL Listed |
| Country of Origin | Finland |
| SKU | WKPR36DUOS |
Ideal For
- Large home saunas between 494 and 1,272 cubic feet
- Sauna enthusiasts who prefer the experience of a traditional wood-fired heat source
- Custom sauna builds where a fireplace aesthetic is part of the design
- Homeowners who want the option to add an integrated hot water source
- Buyers seeking a UL Listed wood-burning stove from an established Finnish manufacturer
Important Information
- Professional installation required. Wood-burning sauna stoves require proper chimney and flue installation. All work must be performed by a qualified installer in accordance with local building and fire codes.
- Chimney system required. A compatible chimney must be installed before use. Refer to the chimney installation manual for specifications and clearance requirements.
- Sauna stones not included. Four boxes of sauna stones are required for operation. Stones must be loaded and arranged as specified in the installation manual before first use.
- Minimum clearances must be observed. Maintain required distances from walls, benches, and combustible materials as specified in the installation manual.
- Water heater sold separately. The optional pipe-mounted water heater is not included and must be purchased and installed separately.
- UL Listed. This stove meets UL safety standards for residential use in the United States and Canada.
- Download the installation manuals before beginning any installation work. Follow all manufacturer instructions and applicable local codes.
Frequently Asked Questions
What size sauna room is the Harvia 36 Duo designed for?
The Harvia 36 Duo is rated for sauna rooms between 494 and 1,272 cubic feet. Room size calculations should account for ceiling height, insulation, and any glass or non-insulated surfaces. Consult a professional if you are unsure whether this stove is the right fit for your space.
Is this a wood-burning stove only, or does it also function as a fireplace?
The Harvia 36 Duo functions as both a wood-burning sauna heater and a fireplace. The large glass door allows you to see the fire while the stove heats the sauna room, combining functional heating with a traditional open-fire aesthetic.
Are sauna stones included with the Harvia 36 Duo?
No. Four boxes of sauna stones are required for operation but are not included with this stove. Stones must be purchased separately and loaded according to the instructions in the installation manual.
Does the Harvia 36 Duo require a chimney?
Yes. As a wood-burning stove, the Harvia 36 Duo requires a properly installed chimney and flue system. A chimney installation manual is available — download it before beginning installation and ensure all work complies with local building and fire codes.
Can I add a water heater to the Harvia 36 Duo?
Yes. The Harvia 36 Duo is compatible with an optional pipe-mounted water heater that can be added to integrate a hot water source into your sauna. The water heater is sold separately and must be installed according to the manufacturer's instructions.
Is the Harvia 36 Duo UL Listed?
Yes. The Harvia 36 Duo is UL Listed, meaning it has been independently tested and meets recognized safety standards for residential use in the United States and Canada.
Where is the Harvia 36 Duo manufactured?
The Harvia 36 Duo is manufactured in Finland. Harvia has been producing sauna equipment for decades and is one of the most recognized names in the sauna industry.
The Harvia 36 Duo is a well-built, dual-function sauna stove for homeowners who want the authentic experience of a wood-fired sauna with the added character of a visible flame. If you have questions about sizing, chimney compatibility, or the optional water heater, contact us before ordering — we're here to help you make the right choice.
This product is a sauna heating appliance. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any health condition. Consult a qualified healthcare provider before use if you have any medical concerns.