Name: Wood Burning Sauna Heater Harvia 20 LS Pro black
Brand: Harvia
SKU: WKPR20LSM
Price: 1044.00 EUR
Availability: InStock

Product Information

Dimensions and Weight
Item information	Value
GTIN:	6417659036566
HAN:	WK200LS
Category:	SAUNA HEATERS
BimSchV:	Without BimSch
Fire chamber cover:	10 mm
Diameter of smoke outlet:	115 mm
Water tank capacity:	30 L
Country of origin:	Finland
Rear safety distance (flammable materials):	300 mm
Rear safety distance (non-combustible materials):	100 mm
Minimum ceiling height (depending on connections and thus on the output, star/triangle):	2060 mm
Width:	585 mm
Height:	740 mm
Depth:	510 mm
Sauna room max:	20 m³
Sauna room min:	8 m³
Safety distance (ceiling):	1300 mm
Safety distance on the left (flammable materials):	300 mm
Safety distance on the left (non-combustible materials):	100 mm
Safety distance on the right (flammable materials):	300 mm
Safety distance on the right (flammable materials):	100 mm
Stones Ø Diameter:	100 - 150 mm
Stone capacity max,:	40 kg
Front safety distance (non-combustible materials):	300 mm
Front safety distance (combustible materials):	300 mm
Heater output without BimSchV:	24.1 kW
Content:	1,00 Piece

Product Description

Harvia 20 LS Pro Wood-Burning Sauna Stove

The Harvia 20 LS Pro is a powerful wood-burning sauna stove designed for traditional sauna cabins with a room volume between 8 m³ and 20 m³. Combining authentic wood-fired sauna heat with practical functionality, this model features an integrated 30-litre water tank positioned on the left side. During the heating process, water is warmed simultaneously with the sauna room, creating a highly practical solution for holiday homes, cottages, lakeside cabins, and traditional sauna buildings where an independent hot water supply may not be available.

Unlike conventional wood-burning sauna stoves, the Harvia 20 LS Pro serves as both a sauna heater and a hot water source. As the fire heats the sauna stones and raises the room temperature, the integrated tank provides warm water for washing and sauna use. This dual-purpose design has made the LS series particularly popular among users seeking efficiency, reliability, and a genuine Nordic sauna experience.

Suitable for 8–20 m³ sauna rooms

Integrated 30-litre water tank

Tank positioned on the left side

Water heats during firing

Maximum 40 kg stone capacity

Large stainless steel stone chamber

Cast-iron glass fire door

Visible flame view

10 mm firebox top plate

Adjustable feet

Fast sauna heating

Optimised air channels

The large stone compartment with stainless steel collar provides excellent heat storage and produces a pleasant, traditional steam effect. With a maximum stone capacity of 40 kg, the stove delivers balanced heat distribution while maintaining efficient airflow through the stone chamber.

A robust 10 mm thick firebox top plate has been engineered to withstand long-term thermal stress. Together with the cast-iron glass door, the stove combines durability with visual appeal. The warm glow of the fire remains visible throughout the sauna session, enhancing the atmosphere and creating an authentic wood-fired sauna experience.

Optimised combustion air channels support clean combustion, efficient fuel use, and rapid heating performance. The result is dependable temperature development, reduced emissions, and a traditional sauna environment that combines classic wood heating with practical modern functionality.

Recommended Accessories

Harvia Sauna Stones 20kg 10-15 cm

Art.-Nr.: AC3020

850 mm Steam Cannon

Art.-Nr.: NB-15814

Why Accessories Matter

For a wood-burning sauna stove such as the Harvia 20 LS Pro, accessories are not merely optional extras but an essential part of the overall sauna system. The most important accessory is the sauna stone filling. Because the stove is supplied without stones, suitable sauna stones must be selected separately. Proper sauna stones absorb, store, and gradually release heat, creating a more stable sauna climate and significantly improving the quality of steam generation. Correct stone selection also supports proper airflow through the stone chamber, allowing the stove to perform as designed.

The recommended Harvia sauna stones are specifically suited to the thermal conditions generated inside a wood-burning sauna stove. Properly selected stones improve heat retention, support even steam production, and help protect the stove structure from unnecessary thermal stress. Poor-quality or unsuitable stones can restrict airflow, increase heating times, and negatively impact overall performance.

The optional steam cannon provides additional control over steam production. Instead of pouring water directly onto the upper stone surface, the steam cannon allows water to reach deeper hot zones inside the stone chamber. This can produce more intense, evenly distributed steam and provides a more controlled sauna experience. Many experienced sauna users appreciate this approach because it allows a more refined balance between heat, humidity, and air circulation.

Accessories also contribute to long-term operational safety and durability. Proper stone filling, suitable steam accessories, and coordinated installation components help preserve efficiency, reduce unnecessary wear, and maintain the intended functionality of the stove. A wood-burning sauna stove should always be viewed as a complete system consisting of heat generation, stone storage, air circulation, water application, and safe installation.

Important Installation and Usage Information

Installation of the Harvia 20 LS Pro requires careful planning because combustion, heat development, chimney integration, ventilation, and structural safety all work together as a complete system. Before installation, it is important to verify that the sauna room volume falls within the recommended range of 8 m³ to 20 m³. Correct sizing ensures efficient heating performance and helps maintain a balanced sauna climate.

Particular attention should be paid to the integrated 30-litre water tank. The tank is positioned on the left side of the stove and becomes an integral part of the overall sauna operation. Users should ensure that sufficient space is available for both safe installation and practical use of the hot water function.

The maximum stone quantity of 40 kg must not be exceeded. Only suitable sauna stones designed for wood-burning sauna stoves should be used. Stones should be arranged carefully to maintain unrestricted airflow through the stone chamber. Improper stone placement can reduce efficiency, negatively affect combustion performance, and impair heat distribution.

Safe operation also requires proper integration into a suitable chimney and flue gas system. Within Europe, wood-burning sauna stoves are subject to EN 15821:2010 requirements and must carry CE marking. While the Harvia 20 LS Pro complies with European requirements, it is important to note that this model does not have approval for operation in Germany. Anyone planning installation in Germany should consult the responsible chimney sweep and local authorities before purchase and commissioning.

The adjustable feet assist with stable positioning but do not replace proper preparation of the installation surface. The base must be suitable for the weight of the stove and capable of meeting all applicable fire safety requirements. Adequate combustion air supply is equally important because the optimised combustion channels can only function correctly when sufficient fresh air is available.

Ultimately, safe and efficient operation depends on the interaction of correct sauna sizing, appropriate stone filling, proper fuel selection, suitable chimney design, and professional installation. Only when all these factors work together can the Harvia 20 LS Pro deliver the traditional wood-fired sauna experience it was designed to provide.

Why Buy From Us?

We are a partner of this brand and understand not only the stove itself but also the complete system surrounding it. A wood-burning sauna stove with an integrated water tank requires careful coordination between stove technology, accessories, chimney design, sauna dimensions, and installation requirements. Our experience allows us to help customers build a complete and practical sauna solution rather than simply purchasing individual components.

Our product selection is based on compatibility, functionality, and long-term performance. We carefully choose accessories that complement the stove and help customers avoid unnecessary purchasing mistakes. This makes planning easier and allows technical requirements to be assessed realistically before installation begins.

The Harvia 20 LS Pro is not simply a heating appliance; it is part of a larger sauna system. By purchasing through us, customers benefit from a combination of brand partnership, product expertise, and carefully selected accessories that are designed to work together. This creates a more reliable foundation for a sauna project that is both enjoyable and technically well planned for many years of operation.

Warranty & Conditions

The currently available manufacturer documentation for the Harvia 20 LS Pro does not specify separate detailed warranty periods for private or commercial use. For legally binding information, the official manufacturer documentation and applicable statutory warranty regulations should always be consulted.

Regardless of warranty conditions, professional installation in accordance with manufacturer instructions and applicable regulations is essential. Correct integration into the chimney system, compliance with national and regional requirements, and coordination with the responsible chimney sweep are particularly important for wood-burning sauna stoves.

Long-term operational reliability also depends on using the stove within its intended sauna volume range of 8 m³ to 20 m³, observing the maximum stone quantity of 40 kg, and using suitable sauna stones. Failure to comply with installation or operating requirements may affect operational safety and could influence eligibility for potential warranty claims.

Because this model does not have approval for Germany, special care must be taken before any intended installation or operation within Germany. For definitive information regarding warranty coverage, conditions, and legal requirements, users should always consult the original manufacturer documentation and the regulations applicable at the installation location.

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User Manual Harvia 20 LS Pro black

Certificate Harvia 20 LS Pro black

Manufacturer according to GPSR
Harvia oy, Teollisuustie 1-7, 40950 Muurame, Finnland, harvia@harvia.com

Wood Burning Sauna Heater Harvia 20 LS Pro black

1. High-quality stones perfect for sauna infusions

2. Protective Cloak

3. Hot Water Tank

4. Protective Base

5. Select the appropriate complete chimney kit below

6. Sauna Accessories

Your configuration

Dimensions and Weight