The Harvia WP500 is a 50-litre wood-burning sauna cauldron designed to heat large volumes of water for traditional Finnish cottage sauna use. Its stainless steel inner vessel is removable for easy cleaning, and the fire chamber is positioned directly beneath the cauldron for efficient, even heat transfer. A replaceable fire chamber extends the product's service life, while the stainless steel outer casing provides durability in humid sauna environments. For those who want a self-contained, wood-fired water heating solution that fits naturally into a traditional sauna setup, the WP500 is a purpose-built option from Harvia.
Why Customers Choose This Cauldron
- 50-litre capacity for heating large volumes of water in one session
- Removable stainless steel inner vessel for straightforward cleaning
- Fire chamber positioned directly under the cauldron for efficient heat transfer
- Replaceable fire chamber for long-term serviceability
- Stainless steel outer casing built for humid sauna environments
- No electricity required — fully wood-fired operation
- Designed and manufactured by Harvia in Finland
- Adds a traditional Finnish cottage sauna atmosphere
Product Highlights
50-Litre Water Capacity
The WP500 holds 50 litres of water, making it well-suited for extended sauna sessions or settings where a larger hot water supply is needed. It is designed for cottage and residential sauna environments where water volume matters.
Removable Stainless Steel Inner Vessel
The inner cauldron is made from durable stainless steel and can be fully removed from the outer casing for cleaning. This design makes routine maintenance straightforward without requiring disassembly of the entire unit.
Direct-Fire Heat Transfer
The fire chamber is structured so that heat is distributed directly beneath the inner cauldron, promoting efficient and consistent water heating throughout the burn cycle.
Replaceable Fire Chamber
The fire chamber is designed to be replaced when worn, extending the overall service life of the cauldron without requiring full unit replacement. This makes the WP500 a cost-effective long-term investment.
Stainless Steel Outer Casing
The exterior is constructed from stainless steel, which resists corrosion and holds up well in the high-humidity conditions typical of sauna environments.
No Electrical Connection Required
The WP500 operates entirely on wood fuel with no electrical components, making it compatible with off-grid cabins, outdoor sauna structures, and remote installations.
Manufactured by Harvia in Finland
Harvia has been producing sauna equipment in Finland for over 70 years. The WP500 reflects the same build standards applied across the Harvia product line.
Specifications
| Model | WP500 |
|---|---|
| Water Capacity | 50 litres |
| Primary Fuel | Wood |
| Inner Vessel Material | Stainless Steel (removable) |
| Outer Casing Material | Stainless Steel |
| Fire Chamber | Replaceable |
| Dimensions (D x W x H) | 18 in x 20 in x 31 in |
| SKU | WP500 |
| Barcode (EAN) | 6417659001502 |
| Country of Origin | Finland |
In the Box
- Harvia WP500 Cauldron (50L)
- Removable Stainless Steel Inner Vessel
- Stainless Steel Outer Casing
- Replaceable Fire Chamber
- Installation and Operation Manual
A compatible chimney system is required for installation and is sold separately. Refer to the Chimney Installation Manual included with the unit.
Ideal For
- Traditional Finnish cottage saunas requiring a large hot water supply
- Residential saunas where wood-fired water heating is preferred
- Off-grid cabins and remote sauna installations without electrical access
- Sauna owners who want a low-maintenance, long-service-life water heater
- Builders and installers looking for a self-contained wood-fired cauldron solution
Important Information
- Professional installation is strongly recommended. This unit requires a properly rated chimney system and must be installed in accordance with local building codes and fire safety regulations.
- Chimney system: A compatible wood-burning chimney is required and sold separately. Refer to the included Chimney Installation Manual for full specifications and clearance requirements.
- Ventilation: Adequate ventilation must be maintained during operation. Do not operate in an enclosed space without proper air supply and exhaust.
- Hot water hazard: The cauldron heats water to high temperatures. Use appropriate caution when accessing or handling hot water. Keep children away from the unit during and after operation.
- Fuel: Use only dry, seasoned hardwood. Do not burn treated wood, painted wood, garbage, or accelerants.
- Ash disposal: Allow ash to cool completely before disposal. Store cooled ash in a metal container away from combustible materials.
- Cleaning: Remove and clean the inner stainless steel vessel regularly to prevent mineral buildup and maintain performance.
The Installation and Operation Manual and Chimney Installation Manual are included with the unit and contain full safety, clearance, and installation requirements.
Frequently Asked Questions
What is a sauna cauldron used for?
A sauna cauldron is a wood-fired water heater used in traditional Finnish sauna settings to provide a supply of hot water. It is commonly used for washing, steam generation, and maintaining the authentic cottage sauna experience.
How much water does the WP500 hold?
The WP500 holds 50 litres of water. This capacity is suited for extended sauna sessions or settings where a larger volume of hot water is needed.
Is the inner vessel removable for cleaning?
Yes. The stainless steel inner vessel is fully removable from the outer casing, making it straightforward to clean without disassembling the entire unit.
Does the WP500 require electricity?
No. The WP500 is a fully wood-fired unit with no electrical components. It is compatible with off-grid cabins, outdoor sauna structures, and remote installations where electrical connections are unavailable.
What chimney system is required?
A chimney system rated for wood-burning appliances is required and sold separately. Full specifications and clearance requirements are detailed in the Chimney Installation Manual included with the unit.
Can the fire chamber be replaced?
Yes. The fire chamber is designed to be replaceable, which extends the overall service life of the cauldron without requiring full unit replacement. Replacement fire chambers are available through Harvia.
What type of wood should I use?
Use only dry, seasoned hardwood with a moisture content below 20%. Avoid treated wood, painted wood, garbage, or any accelerants. Proper fuel selection supports cleaner combustion and extends the life of the unit.
Where is the Harvia WP500 manufactured?
The WP500 is designed and manufactured in Finland by Harvia, which has been producing sauna equipment for over 70 years.
The Harvia WP500 is a well-constructed, purpose-built wood-fired cauldron for traditional sauna use. If you are looking for a durable, large-capacity water heater with a removable vessel, a replaceable fire chamber, and no electrical requirements, this is a straightforward and reliable option. Order today and receive the complete unit with full installation documentation included.
Sauna use is a personal wellness practice. Consult a qualified healthcare provider before use if you have any medical conditions, are pregnant, or are taking medications. This product is not intended to diagnose, treat, cure, or prevent any disease or medical condition.