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Description
The Harvia Cauldron is a wood-burning water heater that heats 50 liters of water for washing in and around the sauna. It suits a traditional cottage-style sauna, including cabins without electricity.
Build
The inner cauldron is stainless steel and lifts out for cleaning. The fire chamber is lined with vermiculite and is replaceable, and it directs the flames under the cauldron so the water heats quickly and evenly.
Specifications
- Model: WP500
- Capacity: 50 liters
- Fuel: wood
- Inner cauldron: stainless steel, lifts out for cleaning
- Fire chamber: vermiculite, replaceable
- Heating: flames directed under the cauldron
Related
Browse sauna accessories or sauna heaters.
Specifications
| Model | WP500 |
|---|---|
| Capacity | 50 liters |
| Fuel | wood |
| Inner cauldron | stainless steel, lifts out for cleaning |
| Fire chamber | vermiculite, replaceable |
| Heating | flames directed under the cauldron |
Specifications from the manufacturer. Dimensions are approximate.
Shipping
We ship to the 48 contiguous U.S. states and Washington, DC. Your shipping cost is calculated at checkout and shown before you pay.
You will get an order confirmation right away and tracking by email when your order ships. Questions about timing for a specific item? Call (945) 280-3243 or email support@restoresuite.com before you order.
Delivery
Large items such as saunas, hot tubs and cold plunge tubs usually ship by freight. The carrier contacts you to schedule delivery. Please check the packaging and note any damage on the delivery receipt before you sign, then tell us within 48 hours so we can resolve it for you.
Before delivery day, measure doorways and hallways along the path to the install spot, and confirm the electrical requirement on the Specifications tab.
Warranty
30-day limited warranty against manufacturing defects
If this item has a manufacturing defect within 30 days of purchase, contact us with your order number and a photo or video of the issue and we will make it right.
Reviews
What delivery looks like

Manuals and documents
Official Harvia documents for this model. Opens as a PDF.

Why this one
A wood-fired 50 liter water heater for washing up in a traditional sauna, with a stainless cauldron that lifts out to clean.
- Heats 50 liters of water over a wood fire.
- Stainless steel inner cauldron lifts out.
- Replaceable vermiculite fire chamber.
- No electricity needed.

Key specs at a glance
The numbers to check before you order. Full details are on the Specifications tab.
- Capacity
- 50 liters
- Heating
- flames directed under the cauldron
Before you buy: what to know
Based on the manufacturer's specs, manuals and our research.
- The Cauldron heats 50 liters of water with wood, no electricity, for washing in and around the sauna. It suits a cottage-style or off-grid cabin sauna.
- The stainless inner cauldron lifts out for cleaning, and the vermiculite fire chamber is replaceable, so the parts that see the most heat can be renewed.
- It is a separate wood-burning appliance, so plan its own flue and clearances from the installation manual alongside your stove.
- Returns are accepted within 30 days with a 25% restocking fee on unused, unopened items. Work out your room volume first, so the output you order is the right one.
Not sure this is the right fit? Ask us or call (945) 280-3243.
Common questions
How much water does it hold?
Does it need electricity?
How do I clean it?
Can the fire chamber be replaced?
Choosing the right setup can be tricky. We are here to help.
Tell us your space, power and how you plan to use it, and we will help you compare models honestly, including whether this one is the right fit.
Why buy from Restore Suite
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Honest guidance
Free guides and calculators for sizing, running costs and safety, so you can decide with real numbers. See the research
