The Harvia Pro 20 LS is a wood-burning sauna stove with an integrated 30-liter water tank, making it a practical choice for cottage and residential saunas where hot water is needed alongside sauna heat. The water tank is fixed to the left side of the stove and heats passively as the stove is fired, so hot water is ready by the time the sauna reaches temperature. The stove features a stainless-steel front panel, a graphite-black outer casing, and a glass-panel firebox door that allows the fire to be viewed during use. With a stone compartment sized for at least 88 lbs of sauna stones and a chimney-connected wood-burning design, the Pro 20 LS is a well-rounded stove for traditional sauna builds. Made in Finland by Harvia.
Why Customers Choose This Stove
- Integrated 30-liter water tank heats passively while the stove fires — no separate water heater needed
- Glass-panel firebox door allows the fire to be viewed during the sauna session
- Stainless-steel front panel with graphite-black outer casing — durable and clean-looking
- Large stone compartment (minimum 88 lbs) for consistent, even heat and traditional steam production
- Wood-burning design for a traditional Finnish sauna experience without reliance on electricity
- Made in Finland by Harvia, a well-established sauna equipment manufacturer
Product Highlights
Integrated 30-Liter Water Tank
The fixed 30-liter water tank is mounted on the left side of the stove and heats passively from the stove’s heat output while the sauna is being fired. This provides a supply of hot water for rinsing or other use without requiring a separate water heating system.
Glass-Panel Firebox Door
The firebox door features a glass panel that allows bathers to view the fire during the sauna session. The door frame is robust and designed for repeated high-temperature use.
Stainless-Steel Front with Graphite-Black Casing
The front panel is finished in stainless steel, while the outer casing is painted graphite black. This combination provides a clean, professional appearance suited to both traditional and contemporary sauna interiors.
Large Stone Compartment
The stove accommodates a minimum of 88 lbs of sauna stones (sold separately), providing the thermal mass needed for consistent heat and traditional steam (löyly) production when water is poured over the stones.
Wood-Burning Design
The Pro 20 LS is a chimney-connected wood-burning stove, making it suitable for sauna installations where electricity is limited or where a traditional wood-fired sauna experience is preferred.
Made in Finland by Harvia
The Pro 20 LS is designed and manufactured in Finland by Harvia, a company with a long track record in sauna equipment production for residential and commercial use.
Specifications
| Model | Harvia Pro 20 LS |
| Fuel Type | Wood-burning |
| Water Tank Capacity | 30 liters (integrated, left-side mounted) |
| Minimum Stone Requirement | 88 lbs (stones sold separately) |
| Front Panel Material | Stainless steel |
| Outer Casing Finish | Graphite black painted |
| Firebox Door | Glass panel |
| Installation Type | Floor-standing, chimney-connected |
| Shipping Weight (approx.) | 350 lbs |
| Country of Manufacture | Finland |
| Barcode (EAN) | 6417659017831 |
Ideal For
- Cottage and residential saunas where hot water availability alongside sauna heat is a priority
- Installations where electricity is limited or unavailable and wood-burning heat is preferred
- Owners who want a traditional Finnish wood-fired sauna experience with a glass-door firebox
- New sauna builds requiring a floor-standing, chimney-connected wood stove with an integrated water supply
- Sauna rooms sized for a residential or cottage-scale wood-burning stove
Important Information
- This is a wood-burning stove. Installation requires a properly constructed chimney system. Review the chimney installation requirements before ordering and ensure your installation complies with all applicable local building and fire codes.
- Sauna stones are not included. A minimum of 88 lbs of sauna-rated stones are required. Use only stones specifically rated for sauna use — standard rocks or landscaping stones can crack or shatter under high heat.
- The integrated water tank holds 30 liters. Ensure the tank is filled with water before firing the stove. Operating the stove with an empty tank can damage the tank.
- Maintain all minimum clearance distances specified in the installation manual between the stove body, flue pipe, and all combustible surfaces, walls, and benches.
- The stove must be installed on a non-combustible floor surface or a properly constructed non-combustible hearth pad. Verify requirements in the installation manual.
- This stove is intended for indoor sauna use only. Do not operate in outdoor, unenclosed, or improperly ventilated environments.
- Contact our team or a qualified installer if you have questions about chimney sizing, clearance requirements, or installation specifications before ordering.
Frequently Asked Questions
How does the integrated water tank work?
The 30-liter water tank is fixed to the left side of the stove and heats passively from the stove’s heat output as the sauna is being fired. By the time the sauna reaches temperature, the water in the tank is hot and ready for use. The tank must be filled with water before the stove is lit — operating with an empty tank can cause damage.
Are sauna stones included?
No. Sauna stones are sold separately. A minimum of 88 lbs of sauna-rated stones are required. Use only stones specifically rated for sauna use — standard rocks or landscaping stones can crack or shatter under high heat and should not be used.
Does this stove require a chimney?
Yes. The Harvia Pro 20 LS is a wood-burning stove and requires a properly constructed chimney system for safe operation. Chimney sizing, clearance requirements, and installation specifications should be reviewed before beginning installation. All chimney work must comply with local building and fire codes and should be performed by a qualified installer.
Can I pour water on the stones?
Yes. The stone compartment is designed to accommodate traditional löyly — pouring water over the stones to produce steam. Always follow the manufacturer’s guidelines for water use to avoid damage to the stove components.
What floor surface is required under the stove?
The stove must be installed on a non-combustible floor surface or a properly constructed non-combustible hearth pad. The specific requirements are detailed in the installation manual. Verify compliance with local building and fire codes before installation.
Is this stove suitable for off-grid or cottage use?
Yes. The Pro 20 LS is a wood-burning stove with no electrical requirements for heating operation, making it well-suited for cottage and off-grid sauna installations. The integrated water tank also reduces the need for a separate water heating system in locations where hot water infrastructure is limited.
Where is the Harvia Pro 20 LS manufactured?
The Harvia Pro 20 LS is designed and manufactured in Finland by Harvia.
The Harvia Pro 20 LS is a practical, well-specified wood-burning sauna stove for cottage and residential installations where integrated hot water and traditional wood-fired heat are both priorities. If you have questions about chimney requirements, stone sizing, or whether this stove is the right fit for your sauna build, contact our team before ordering.
This product is a wood-burning sauna stove intended for use in properly constructed sauna rooms. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease or health condition. Consult a qualified healthcare provider before use if you have any medical concerns.