Harvia

Harvia Pro 20 RS 24.1kW Wood Burning Sauna Stove w/ Right Water Tank | WKPR20RSM

Harvia Pro 20 RS 24.1 kW wood-burning sauna stove with a built-in 7.9-gallon (30 L) water tank on the right side, for 283–706 cu ft saunas

$2,217

$2,599

Save $382

In stock

Estimated delivery

7–12 days after you order

Built-in 7.9 gal (30 L) water tank on the right, tap at the front
Wood-fired: no electrical hookup needed
Up to 88 lb of 4–6" stones

The Sauna Mastery Protocol Digital Guide

Full-Value Freight Protection

Perfect for sauna rooms from 283 - 706 ft³

Select Stones

Required for Operation

Harvia Split-Face Olivine Diabase Sauna Heater Stones 4-6" / 44lbs | AC3020 | 2 Boxes
$124

Select Chimney Kit

Required for Operation

Harvia Sauna Stove Chimney Kit | WHP1500 | Stainless Steel
$1,487
Harvia Sauna Stove Chimney Kit | WHP1500 | Black
$1,578

Select Add-Ons

Harvia Protective Bedding LG
$356
Harvia Pipe Adapter | WZ115155
$105
Harvia One-Sided Protective Sheath, 20 Series | WL500
$224

Quantity

Curbside freight delivery by appointment; an adult must sign for the shipment. How it works

Secure checkout
30-day return window*
2-year manufacturer warranty

*Eligible returns must be requested within 30 days of delivery. Restocking and freight charges apply, and some items are final sale. See the Refund Policy.

Description

What is the Harvia Pro 20 RS wood-burning sauna stove with water tank?

The Harvia Pro 20 RS (WKPR20RSM) is a 24.1 kW wood-burning sauna stove with a built-in 7.9-gallon (30 L) water tank on its right side, for sauna rooms of 283 to 706 cu ft. The tank's tap is at the front. The stove stands on adjustable legs, has a graphite-black painted steel casing, a glass door and an ash box, holds up to 88 lb (40 kg) of 4–6" stones, and connects to the chimney at the top or the rear through a 4.5" (115 mm) opening. It burns firewood and needs no electrical connection.

The Harvia Pro 20 LS is the mirror image, with the tank on the left, and the Harvia Pro 20 ES has a smaller 5.3-gallon (20 L) tank at the front. The Harvia Pro 20 is the same stove without a tank, and the Harvia wood-burning stove collection has every Harvia wood-burning stove Topture sells.

Harvia Pro 20 RS key features

24.1 kW for sauna rooms of 283–706 cu ft (8–20 m³)
Built-in 7.9 gal (30 L) water tank on the right side; tap at the front
Up to 88 lb (40 kg) of 4–6" stones
Top or rear chimney connection, 4.5" (115 mm)
Graphite-black painted steel casing, glass door and ash box
Takes firewood up to 15.4" (390 mm) long
CE marked (EN 15821)
2-year manufacturer warranty

Specifications

Does the Harvia Pro 20 RS fit my sauna?

The Harvia Pro 20 RS heats sauna rooms of 283 to 706 cu ft (8–20 m³). Harvia's manual adds 1.2 m³ for every square meter of uninsulated brick, glass block, glass, concrete or tile wall, about 3.9 cu ft per sq ft, and a glass door counts: its example is a 10 m³ room with a glass door, which needs the output of a 12 m³ room. Multiply the volume of a solid-log sauna by 1.5. The Pro 20 RS needs at least 51.2" (1,300 mm) between the top of the stove and the ceiling. Harvia's data sheet gives a minimum sauna room height of 81.1" (2,060 mm), counted with the legs fully lowered.

Harvia Pro 20 RS specifications

Harvia Pro 20 RS (WKPR20RSM), Harvia manual Y05-1343-1 and data sheet WKPR20RSM
Output	24.1 kW
Sauna room volume	283–706 cu ft (8–20 m³)
Minimum room height	81.1" (2,060 mm) (Harvia data sheet), with the legs fully lowered
Top of the stove to the ceiling	51.2" (1,300 mm)
Dimensions	22.8" W × 20.1" D × 29.9–31.1" H (580 × 510 × 760–790 mm), with the adjustable legs
Legs	Adjustable, 0–1.2" (0–30 mm)
Net weight	132.3 lb (60 kg), Harvia data sheet
Stones	Up to 88 lb (40 kg) of 4–6" (10–15 cm) stones; two 44 lb boxes of Harvia AC3020 cover it
Water tank	7.9 gal (30 L), built in on the right side; tap at the front
Chimney connection	Top or rear, 4.5" (115 mm); chimney class T600 with a flue at least 4.3" (110 mm) across; rear opening centered 22.0" (560 mm) above the floor
Firewood	Up to 15.4" (390 mm) long, 3.1–5.9" (8–15 cm) across
Materials	Steel; the outer casing is painted graphite black (Harvia); glass door
Electrical connection	None; wood-fired
Certification	CE marked (EN 15821)
Harvia part number	WKPR20RSM (GTIN 6417659036573); earlier item code WK200RS
Warranty	2-year manufacturer warranty; stones are not covered

Installation

How is the Harvia Pro 20 RS installed?

The Harvia Pro 20 RS stands on its adjustable legs, on a floor strong enough to carry it, inside the safety distances below, and connects to a T600 chimney. Harvia's manual says all local regulations apply, that the stove is not suitable for a shared flue, that no electrical devices, wires or combustible materials may sit within the safety distances, and that the local fire authorities can give detailed fire-safety requirements. Harvia's installation manual, under Documents, gives the step-by-step installation, the chimney connection details and the wood loads.

Does the Harvia Pro 20 RS need floor protection?

It depends on the floor under the Harvia Pro 20 RS. A bare concrete floor at least 2.4" (60 mm) thick needs no protection. A tile floor needs Harvia protective bedding or similar heat-radiation protection, because the adhesives and waterproofing under tile do not resist the stove's heat. A floor made of combustible material needs the bedding too, plus non-combustible protection in front of the stove door. Harvia's manual names the WL110 (Harvia says the WL100 is not for the LS and RS) bedding for the Harvia Pro 20 RS. The Harvia WL110 protective bedding (Protective Bedding LG) is sold separately; it does not come with the stove.

Harvia Pro 20 RS safety distances

Keep at least these distances between the Harvia Pro 20 RS and anything that can burn.

Harvia Pro 20 RS minimum safety distances (Harvia manual Y05-1343-1)
Top of the stove to the ceiling	51.2" (1,300 mm)
Sides to combustible material	11.8" (300 mm)
Rear to combustible material	11.8" (300 mm)
Front to combustible material	11.8" (300 mm)
To a masonry wall	2.0" (50 mm) if air can circulate in front and at one side; 3.9" (100 mm) in a recess

Harvia Pro 20 RS with the WL500 (one side) or WL590 (full) protective sheath (Harvia manual Y05-1343-1)
Sides	2.4" (62 mm)
Rear	2.4" (62 mm)
Front	16.6" (422 mm)
Sheath to wall	1.2" (30 mm)

The shorter distances apply only with a sheath fitted, and the one-sided WL500 shortens only the side it covers. With a sheath, the front distance grows to 16.6" (422 mm). Topture stocks the WL500; the full WL590 is not stocked. Without a sheath, use the first table.

Connecting the Harvia Pro 20 RS to a chimney

The Harvia Pro 20 RS connects at the top or the rear through a 4.5" (115 mm) opening, to a chimney of temperature class T600 with a flue at least 4.3" (110 mm) across; it cannot share a flue with another fireplace. The Harvia WHP1500 chimney kit (sold separately) fits the top opening, and its page gives the roof and clearance requirements. The rear opening connects to a masonry flue. For North American 6" chimney pipe, the Harvia WZ115155 pipe adapter (sold separately) adapts the opening.

Does the Harvia Pro 20 RS need a first firing?

Yes, outdoors, with the water tank filled. Harvia's manual says to fire the Harvia Pro 20 RS once outside before its first sauna, until the paint on the stove stops smoking, and to load the stones only after it has cooled.

What's Included

What's in the box with the Harvia Pro 20 RS?

Harvia Pro 20 RS wood-burning sauna stove with its glass door, ash box and adjustable legs
Built-in 7.9 gal (30 L) water tank with its tap
Flue connection pipe, and a blocking plug for the connection opening you don't use
Soot-opening stoppers and a tool for opening the hot door and ash box
Installation and user manual

What you need separately

Two 44 lb boxes (88 lb) of Harvia AC3020 4–6" stones
A chimney: the Harvia WHP1500 chimney kit in stainless steel or black, or a T600 masonry flue
On a tile or combustible floor: the Harvia WL110 protective bedding (Protective Bedding LG), plus non-combustible protection in front of the door on a combustible floor
Optional: the Harvia WL500 one-sided protective sheath, which shortens the distances to combustible walls
Optional: the Harvia WZ115155 pipe adapter, for North American 6" chimney pipe

Documents

Harvia Pro 20 ES, Pro 20 LS and Pro 20 RS Installation and User Manual

Bathing Brands Harvia Stone Requirements Chart

Warranty

Harvia Warranty

Read the full LIMITED WARRANTY TERMS AND CONDITIONS

Step 1

Size it right

Every heater page lists the exact room size it's rated for, so you can match it to your sauna before you order.

Step 2

Spec your chimney

Through-roof or through-wall, single-wall or insulated, we help you build the right kit for your install.

Step 3

Real löyly

Wood-fired stones make the most authentic löyly — pour water across them and the steam hits the way Finns intended.

The Topture Experience

More than just a heater

Your purchase includes thoughtful extras to help you get started and enjoy your sauna with confidence.

BONUS 1

The Sauna Mastery Protocol

The session times, temperatures, and weekly rhythm that turn a sauna into a habit you keep. Covers heat-up protocols and what to expect across your first 30 sessions. Sent to your inbox after purchase.

INCLUDED

BONUS 2

Full-Value Freight Protection

Large orders ship fully insured. If freight arrives damaged, Topture helps coordinate the claim and replacement process with the carrier and manufacturer. Proper inspection and damage documentation at delivery are required. Most in-stock orders ship within 2–7 business days.

INCLUDED

Choose your options now

We thought about buying a sauna for years and finally did. We absolutely love it, especially in the winter. It’s incredibly easy to assemble with two people the whole family uses it.

Verified buyer

Ordered this sauna fall 2024 and we love it. No better feeling during a Minnesota winter. Lastly, I have to mention the customer service for this purchase has been like no other. Any questions or requests I had were addressed immediately by Topture. I got more than I expected from them and have already recommended them to several people looking for saunas. SO if you're thinking about it, JUST DO IT already..

Verified buyer

Thanks for the great service - greatly appreciated.

Verified buyer

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Same team before and after the sale, from sizing to warranty support.

Authorized Harvia Retailer

Sold by Topture, with the applicable manufacturer warranty.

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Freight damage? We help coordinate the claim and replacement process.

STILL UNSURE?

Frequently Asked Questions

What comes with the Harvia Pro 20 RS, and what else does it need?

The Harvia Pro 20 RS ships as the wood-burning stove with its built-in 7.9-gallon (30 L) water tank on the right, glass door, ash box and adjustable legs, with Harvia's installation and user manual. It needs no electricity, but it does need 4–6 in sauna stones (two 44 lb boxes of Harvia AC3020 fill its 88 lb stone space), a T600 chimney such as Harvia's WHP1500 kit, and, on a tile or combustible floor, Harvia protective bedding, plus non-combustible protection in front of the door on a combustible floor. None of these come with the stove: Topture offers the stones, the WHP1500 chimney, the WL110 bedding and the WL500 sheath as options, sold separately.

What size sauna does the 24.1 kW Harvia Pro 20 RS heat?

The Harvia Pro 20 RS is rated at 24.1 kW and heats sauna rooms of 283–706 cu ft (8–20 m³), according to Harvia. Harvia adds 1.2 m³ for every square meter of uninsulated brick, glass, tile or concrete surface, about 3.9 cu ft per sq ft, and counts a glass door: a 10 m³ room with a glass door needs the output of a 12 m³ room. Multiply a solid-log sauna's volume by 1.5. The top of the stove needs at least 51.2 in (1,300 mm) to the ceiling. Larger rooms suit the Harvia Pro 26 (353–918 cu ft), which has no water tank.

What chimney does the Harvia Pro 20 RS need?

The Harvia Pro 20 RS needs a chimney of temperature class T600 with a flue at least 4.3 in (110 mm) across; it connects at the top or the rear through a 4.5 in (115 mm) opening, and Harvia's manual does not allow a shared flue. Harvia's WHP1500 steel chimney kit, in stainless or black, joins the top opening with a smoke pipe cut to length; it suits roofs pitched 10° or more (a flat roof needs the WHM24 rain flange) and is CE marked to EN 1856-1. Keep its insulated casing 3.94 in and its uninsulated smoke pipe 19.7 in from anything that can burn. A masonry T600 flue at the rear is the alternative.

How is the Harvia Pro 20 RS installed, and does it need electricity or floor protection?

The Harvia Pro 20 RS stands on adjustable legs and needs no electrical connection. A bare concrete floor at least 2.4 in (60 mm) thick needs no protection; tile needs Harvia protective bedding, such as the WL110, and a combustible floor needs the bedding plus non-combustible protection in front of the door. Keep the stove 51.2 in (1,300 mm) from the ceiling and 11.8 in (300 mm) at the sides, rear and front from combustible walls; a Harvia protective sheath shortens the side and rear distances. Harvia's manual says local regulations apply and the local fire authorities can advise.

What has to be done before the first fire in a Harvia Pro 20 RS?

The Harvia Pro 20 RS must be fired for the first time outdoors, Harvia's manual says, because the protective paint on the stove body smokes while it cures; the stove is ready for normal use once the smoking stops. Fill the water tank before this firing. Fit the smoke pipes for draught during this firing, load no stones until the stove has cooled completely afterwards, and throw no water on it. Do not rub or sweep the painted surfaces until the heat-resistant paint has cured.

What firewood does the Harvia Pro 20 RS burn, and how hot should the sauna get?

The Harvia Pro 20 RS takes firewood up to 15.4 in (390 mm) long and 3.1–5.9 in (8–15 cm) across, and Harvia declares loads of 6.6 lb (3.0 kg) to light the fire and 9.9 lb (4.5 kg) per refuelling. Start with pieces of 3.1–4.7 in (8–12 cm) and refuel with 4.7–5.9 in (12–15 cm). Empty the ash box before each firing and keep the door closed while the fire burns. The Pro 20 RS has no thermostat, so the fire sets the heat: Harvia's rule of thumb is that a sauna over 212°F (100°C) is too hot, and several full loads of wood in a row overheat the sauna, the stove and the chimney and can start a fire.

How do you look after the stones and the water tank of the Harvia Pro 20 RS?

The Harvia Pro 20 RS holds up to 88 lb (40 kg) of 4–6 in (10–15 cm) stones; two 44 lb boxes of Harvia AC3020 split-face olivine diabase stones fill it. Load them only after the first firing, once the stove is cold, with the larger stones at the bottom: Harvia warns that stones placed wrongly can heat nearby structures to dangerous temperatures even outside the safety distances. Rearrange the stones at least once a year and remove any smaller than 4 in or broken. Keep the water tank as full as possible whenever the stove is hot, because an empty tank can be damaged, and drain it with the tap open if the sauna will stand unused or could freeze.

What problems do Harvia Pro 20 RS owners run into, and how are they avoided?

Most problems Harvia's manual lists for the Harvia Pro 20 RS trace back to the chimney, the wood or the stones. Smoke in the sauna or no draught points to a leaking flue connection, a cold flue, an extractor fan pulling air, a full ash box, blocked smoke canals or a connection pipe pushed too far into the flue. A sauna that will not heat is usually too big for the stove, has uninsulated walls or is fired with damp wood; stones that stay cool are often too small or broken. A smell on the first firings is the paint curing, and wooden walls darkening over time is normal.

Who makes the Harvia Pro 20 RS, and what is it made of?

The Harvia Pro 20 RS (WKPR20RSM) is made by Harvia, the Finnish sauna manufacturer; Harvia US Inc. is its warrantor in North America. It has a graphite-black painted steel casing, a glass door, an ash box and a built-in water tank, and it is CE marked to EN 15821, the European standard for wood-fired sauna stoves. It measures 22.8 in wide, 20.1 in deep and 29.9–31.1 in high on its adjustable legs, and weighs 132.3 lb (60 kg) without stones.

What warranty does the Harvia Pro 20 RS have?

Harvia's manufacturer warranty covers the Harvia Pro 20 RS for 2 years of family use. The extra registration year Harvia offers applies to electric heaters only, not to wood-burning stoves, and sauna stones are not covered; the warranty also excludes damage caused by stones Harvia does not recommend. Harvia US Inc. is the warrantor in North America. Topture is an authorized Harvia retailer and assists with troubleshooting and warranty coordination.

How does the Harvia Pro 20 RS compare with the Pro 20 LS and Pro 20 ES?

The Harvia Pro 20 RS and LS are mirror images: the same 24.1 kW stove for 283–706 cu ft with a 7.9-gallon (30 L) water tank, on the right side of the RS and the left side of the LS, and the tap at the front. Choose by where the tank should sit in your room. The Pro 20 ES carries a smaller 5.3-gallon (20 L) tank at the front instead, which keeps it 16.9 in wide against the RS's 22.8 in, but makes it 25.6 in deep. All three hold 88 lb of stones; Harvia names the WL110 bedding for the RS and LS and the WL100 for the ES.

Where can you buy the Harvia Pro 20 RS from an authorized dealer?

Topture is an authorized Harvia retailer and sells the Harvia Pro 20 RS on its own, with AC3020 stones, the WHP1500 chimney, the WL110 bedding, the one-sided WL500 sheath and the WZ115155 adapter as options. Topture adds Lifetime Expert Support, help with troubleshooting and warranty coordination, free shipping on orders over $200 within the continental US, financing through Shop Pay Installments at checkout, and a 30-day return window.

What does a Harvia Pro 20 RS cost in total, delivered?

The delivered cost of a Harvia Pro 20 RS from Topture is the stove price plus the parts it needs: two boxes of AC3020 stones, a chimney such as the WHP1500 kit, and, on a tile or combustible floor, protective bedding. Topture has free shipping on orders over $200 within the continental US, so a Pro 20 RS order ships free there; Harvia stoves travel on a pallet by freight, with Topture's full-value freight protection. Budget separately for installing the chimney. Compare delivered totals, because some listings price the stove without its stones and chimney. Financing is available through Shop Pay Installments at checkout.

General Topture Questions

Where are you located, and where do you ship from?

Topture is an online retailer serving customers in the contiguous United States. The company is Topture LLC, a Wyoming limited liability company, and its registered business address is 30 N Gould St, Ste N, Sheridan, WY 82801.

Orders ship from manufacturer and distributor warehouses in the U.S. and Canada, and some products ship directly from the manufacturer in Europe. Each product page shows its estimated delivery time.

How much is shipping?

Orders over $200 ship free within the continental United States. Orders under $200 carry a small shipping fee.

Two exceptions: SaunaLife and ThermaSol products carry a freight charge at any order value, and sauna stones ordered without a heater ship at $60 per box because of their weight.

Every charge is shown at checkout before you pay.

Do you provide financing?

Absolutely! To view your financing offer, simply select Shop Pay Installments as your payment method at Step 3 of checkout.

You'll need to enter a debit card to receive your offer, but don’t worry—you can still back out before completing the purchase.

How long will it take for my items to arrive?

If your order is in stock, most orders ship within 2–7 business days of purchase. Transit time then depends on the distance from the warehouse and, for freight, on booking a delivery appointment.

For custom, pre-order or made-to-order items, the estimated delivery time frame is listed on the product page. Delivery dates are estimates, so please don't book installation labor until your order has arrived and been inspected.

What happens after I place my order?

As soon as you place your order, you'll receive a confirmation email with your order details—be sure to keep it for your records. Once your order ships, you'll receive another email with tracking information.

For freight deliveries, the carrier will call or text you to schedule an appointment once the shipment reaches their local terminal. Someone needs to be there to inspect the shipment and sign for it. Smaller parcels arrive by UPS or FedEx without an appointment.

Is there a warranty?

Yes. Products purchased through Topture include the applicable manufacturer’s warranty, subject to the manufacturer’s terms. You’ll find the warranty details for each product under the "Warranty" tab on its product page, and we help with troubleshooting and warranty coordination if an issue comes up.

Do you have a showroom?

We don’t have a showroom — we sell online. Our team is available by phone, email and chat to help you compare models, sizes and heaters, and we can send dimensions, installation manuals and electrical requirements before you buy.

Where do you deliver to?

We deliver throughout the 48 contiguous states, with curbside freight delivery for large items. Free shipping and standard rates apply there only. Alaska, Hawaii, Puerto Rico, other U.S. islands and Canada are quoted separately, depending on the brand and model. We can't ship freight or oversized items to P.O. boxes.

Do you ship internationally?

International Shipping

For many products, yes, including to Canada, by custom quote. Email contact@topture.com with the product and your address before you order; availability and cost depend on the brand and model. Any duties, taxes and customs fees are your responsibility.

Shipping to Hawaii, Alaska, and Puerto Rico

Free shipping applies to the continental United States only. Shipping to Alaska, Hawaii, Puerto Rico and other U.S. islands is quoted separately and depends on the brand and model. Email contact@topture.com for a quote before you order.

Your wood burning sauna heater, done the right way.

Built-in 7.9 gal (30 L) water tank on the right, tap at the front
Wood-fired: no electrical hookup needed
Up to 88 lb of 4–6" stones

The Sauna Mastery Protocol Digital Guide

Full-Value Freight Protection

Secure checkout
30-day return window*
2-year manufacturer warranty

*Eligible returns must be requested within 30 days of delivery. Restocking and freight charges apply, and some items are final sale. See the Refund Policy.

Harvia Pro 20 RS 24.1kW Wood Burning Sauna Stove w/ Right Water Tank | WKPR20RSM