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Description
The Harvia Legend SL is a wood-burning sauna stove with an extension feed, so you load wood from an adjoining room or from outside instead of inside the sauna. It has the round black steel stone cage of the Legend series and comes with sauna stones.
Through-wall loading
The extension feed passes through the sauna wall. You stoke the fire from the next room or outside, which keeps wood and ash out of the sauna itself.
Build
The black steel frame holds a large load of stones for slow, even heat and soft steam. The grate separates combustion air for a cleaner, more efficient burn. Smaller safety distances allow more flexible bench placement. It has rear and upper flue connection openings, a soot opening for cleaning, a door that can open either way, and adjustable legs.
Choosing an output
Two outputs are offered. The 16 kW model suits rooms up to 459 cubic feet and the 21 kW model suits rooms up to 848 cubic feet.
Specifications
- Models: WK150LDSL (16 kW) and WKLE20SLM (21 kW)
- Output: 16 kW or 21 kW
- Room volume: 353 to 848 cubic feet across both models
- Loading: extension feed, from an adjoining room or outside
- Frame: black steel stone cage
- Flue connection: rear or upper
- Maintenance: soot opening
- Legs: adjustable
- Sauna stones included
Related
Browse sauna heaters, or use our sauna size calculator to work out your room volume before choosing an output.
Specifications
| Models | WK150LDSL (16 kW) and WKLE20SLM (21 kW) |
|---|---|
| Output | 16 kW or 21 kW |
| Room volume | 353 to 848 cubic feet across both models |
| Loading | extension feed, from an adjoining room or outside |
| Frame | black steel stone cage |
| Flue connection | rear or upper |
| Maintenance | soot opening |
| Legs | adjustable |
| Details | Sauna stones included |
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

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

Why this heater
A Harvia Legend wood sauna stove you load from the next room or outside, in 16 or 21 kW, with stones included.
- Extension feed loads from outside the sauna.
- 16 kW to 459 cu ft, or 21 kW to 848 cu ft.
- Rear or upper flue connection.
- Sauna stones included.

Key specs at a glance
The numbers to check before you order. Full details are on the Specifications tab.
Before you buy: what to know
Based on the manufacturer's specs, manuals and our research.
- The Legend SL has an extension feed through the sauna wall, so you load wood from an adjoining room or from outside. Ash and wood stay out of the sauna.
- The 16 kW model suits rooms up to 459 cu ft and the 21 kW up to 848 cu ft. Stones are included.
- Harvia notes smaller safety distances on this model, which allows more flexible bench placement. Exact distances are in the installation manual.
- Through-wall loading means the firebox opens into the next room, so plan the sauna wall and that room together. You load wood there, which keeps bark and ash out of the sauna.
- It usually ships within 1 to 3 business days and arrives in about 5 to 10 business days, so it can be on site before your build is finished.
Not sure this is the right fit? Ask us or call (945) 280-3243.
Compare Harvia models
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Common questions
How does the extension feed work?
Which output do I need?
Are stones included?
How is it cleaned?
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




