Real help, start to finish
Questions on fit, power or delivery? Call or email us. We stay your first contact after delivery, warranty included.
Shipping shown upfront
Your exact shipping cost is shown at checkout before you pay.
30-day returns
Request a return within 30 days of delivery. Approved change-of-mind returns carry a 25% restocking fee. Damage is made right. Return policy
Description
The Harvia Duo is a wood-burning sauna stove that heats two rooms at once. The stove body sits in the sauna, and the firebox opens through the wall into the next room, so it is a sauna heater on one side and a fireplace on the other. You load wood from the adjoining room, which keeps bark and wood debris out of the sauna.
Build
It is made in Finland, with a stainless steel casing and a steel-framed glass door so you can see the fire from the loading side. Adjustable feet give a stable, level install on uneven floors.
Choosing an output
The Duo comes in 24.1 kW and 31 kW models, covering rooms from 494 to 1,271 cubic feet. Check your sauna's volume before ordering, since an undersized stove will struggle to reach temperature in a large room.
Specifications
- Models: WK200SLUX and WK360SLUX
- Output: 24.1 kW or 31 kW
- Room volume: 494 to 1,271 cubic feet
- Stone capacity: 132 lb, stones included
- Casing: stainless steel with steel-framed glass door
- Loading: from the adjoining room
- Feet: adjustable
- Made in Finland
Related
Browse sauna heaters, or use our sauna size calculator to work out your room volume.
Specifications
| Models | WK200SLUX and WK360SLUX |
|---|---|
| Output | 24.1 kW or 31 kW |
| Room volume | 494 to 1,271 cubic feet |
| Stone capacity | 132 lb, stones included |
| Casing | stainless steel with steel-framed glass door |
| Loading | from the adjoining room |
| Feet | adjustable |
| Details | Made in Finland |
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 Finnish wood sauna stove that loads from the next room, so it heats your sauna on one side and works as a fireplace on the other.
- Loads from the adjoining room, keeping wood mess out of the sauna.
- Glass door shows the fire in the room you load from.
- 24.1 kW or 31 kW models for 494 to 1,271 cubic feet.
- Holds 132 lb of stones, included.
Key specs at a glance
The numbers to check before you order. Full details are on the Specifications tab.
- Stone capacity
- 132 lb, stones included
Before you buy: what to know
Based on the manufacturer's specs, manuals and our research.
- The Duo heats two rooms: the stove body sits in the sauna and the firebox opens through the wall into the next room, which gets the fireplace view. You load from that side.
- Two outputs, 24.1 kW and 31 kW, cover rooms from 494 to 1,271 cu ft. That is a large sauna, so check your volume, since an undersized stove will struggle.
- It holds 132 lb of stones, and the stones are included. The casing is stainless steel with a steel-framed glass door on the loading side.
- Clearances to walls, ceiling and benches come from the installation manual, and a wood stove also needs a proper chimney run. Check local code and your insurer before you build around it.
Not sure this is the right fit? Ask us or call (945) 280-3243.
Compare Harvia models
Swipe to compare 4 models
| Model |
 Harvia Pro 20 24kW Wood Sauna Stove Package with 22L Water Heater & Chimney
From $5,503.00 |
 Harvia Legend 150 BK 16kW Wood Sauna Stove Package with 25L Water Heater
$7,699.97 |
 Harvia Virta Pro HL Electric Sauna Heater with Xenio CX45 & Power Unit
From $6,299.97 |
 Harvia Pro 20 SL 24.1kW Through-Wall Wood Sauna Stove
$2,199.97 |
|---|---|---|---|---|
| Stone capacity | – | – | – | – |
Common questions
How does through-wall loading work?
Which output do I need?
Are stones included?
Where is it made?
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
Warranty terms up front
Each product page states its warranty coverage, and we help you use it if anything goes wrong.
Terms shown upfront
Shipping, delivery, warranty and return terms for each brand are on the product page before you buy, not buried at checkout.
One point of contact
We handle your questions, delivery issues and warranty claims with the manufacturer for you.
Honest guidance
Free guides and calculators for sizing, running costs and safety, so you can decide with real numbers. See the research
