Harvia

Harvia Linear 18 Compact 14.3kW Wood Burning Sauna Stove | WKLI18CPTM

Harvia Linear 18 Compact 14.3 kW double-shell wood-burning stove for 177–636 cu ft rooms; stands 3.6 in (92 mm) from walls beside and behind it

$1,716

$1,999

Save $283

In stock

Estimated delivery

7–12 days after you order

Double shell: 3.6" (92 mm) to walls beside and behind the body, 11.8" above the stove top
Wide room range, 177 to 636 cu ft
Up to 88 lb of 4–6" stones
Wood-fired: no electrical hookup needed

The Sauna Mastery Protocol Digital Guide

Full-Value Freight Protection

Perfect for sauna rooms from 177 - 636 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 SM
$316
Harvia Pipe Adapter | WZ115155
$105
KOLO 1 Gallon Sauna Bucket+Ladle Aluminum & Bamboo | Black
$149

Quantity

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

Covered by the manufacturer's warranty

Products are sourced through authorized channels and include the applicable manufacturer warranty, subject to the manufacturer's terms. Terms vary by brand and model, and we'll send you the exact warranty document on request.

If something goes wrong, contact us first: we help troubleshoot and coordinate the claim with the manufacturer.

Contact our team
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.

At delivery, note any damage on the delivery receipt and take photos before the driver leaves, then report it to us within 24 hours.

How freight delivery works Shipping policy
We're here after your purchase, too.

Need help with delivery, installation documentation, heater questions or a warranty issue? Our team can help you find answers and coordinate with the manufacturer when needed.

Contact our team

Description

What is the Harvia Linear 18 Compact wood-burning sauna stove?

The Harvia Linear 18 Compact (WKLI18CPTM) is a 14.3 kW wood-burning sauna stove for sauna rooms of 177 to 636 cu ft. Its double-shell, black-painted steel body can stand 3.6" (92 mm) from a combustible wall beside and behind it. It stands on adjustable legs, has 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 Linear 16 and Harvia Linear 22 GreenFlame are the other Linear stoves Topture sells, and the Harvia wood-burning stove collection has every Harvia wood-burning stove.

Harvia Linear 18 Compact key features

14.3 kW for sauna rooms of 177–636 cu ft (5–18 m³)
Double-shell body: 3.6" (92 mm) to walls beside and behind it
Up to 88 lb (40 kg) of 4–6" stones
Top or rear chimney connection, 4.5" (115 mm)
Black-painted steel, 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 Linear 18 Compact fit my sauna?

The Harvia Linear 18 Compact heats sauna rooms of 177 to 636 cu ft (5–18 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 Linear 18 Compact needs at least 51.2" (1,300 mm) between the top of the stove and the ceiling, or 41.3" (1,050 mm) under a non-combustible ceiling shield with a 1.2" (30 mm) air gap. Harvia prints no minimum room height for this stove, so plan from the ceiling clearance.

Harvia Linear 18 Compact specifications

Harvia Linear 18 Compact (WKLI18CPTM), Harvia manual Y05-1174 and data sheet WKLI18CPTM
Output	14.3 kW
Sauna room volume	177–636 cu ft (5–18 m³)
Top of the stove to the ceiling	51.2" (1,300 mm), or 41.3" (1,050 mm) under a non-combustible ceiling shield with a 1.2" (30 mm) air gap
Dimensions	17.7" W × 20.1" D × 30.3–31.5" H (450 × 510 × 770–800 mm), with the adjustable legs
Legs	Adjustable, 0–1.2" (0–30 mm)
Net weight	139.6 lb (63.3 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
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	Double-shell steel, painted black; glass door
Electrical connection	None; wood-fired
Certification	CE marked (EN 15821)
Harvia part number	WKLI18CPTM (GTIN 6417659033176)
Warranty	2-year manufacturer warranty; stones are not covered

Installation

How is the Harvia Linear 18 Compact installed?

The Harvia Linear 18 Compact 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 Linear 18 Compact need floor protection?

It depends on the floor under the Harvia Linear 18 Compact. 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 WX018 or WL100 bedding for the Harvia Linear 18 Compact. The Harvia WL100 protective bedding (Protective Bedding SM) is sold separately; it does not come with the stove.

Harvia Linear 18 Compact safety distances

Keep at least these distances between the Harvia Linear 18 Compact and anything that can burn.

Harvia Linear 18 Compact minimum safety distances (Harvia manual Y05-1174)
Top of the stove to the ceiling	51.2" (1,300 mm), or 41.3" (1,050 mm) under a non-combustible ceiling shield with a 1.2" (30 mm) air gap
Walls beside and behind the stove body	3.6" (92 mm)
Walls above the level of the stove top	11.8" (300 mm)
Front to combustible material	11.8" (300 mm)
To a non-combustible wall	2.0" (50 mm)

Connecting the Harvia Linear 18 Compact to a chimney

The Harvia Linear 18 Compact 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 Linear 18 Compact need a first firing?

Yes, outdoors. Harvia's manual says to fire the Harvia Linear 18 Compact 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 Linear 18 Compact?

Harvia Linear 18 Compact wood-burning sauna stove with its glass door and ash box
Grate and flue connecting pipe
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 WL100 protective bedding (Protective Bedding SM), plus non-combustible protection in front of the door on a combustible floor
Optional: the Harvia WZ115155 pipe adapter, for North American 6" chimney pipe

Documents

Harvia Linear 18 Compact Installation and User Manual

Harvia Linear 18 Compact Data Sheet

Harvia Linear 18 Compact Declaration of Performance

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

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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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Compare models from multiple sauna manufacturers based on your space, climate, capacity, preferences, and budget.

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Get help matching the heater to the sauna volume, glass area, controls, and electrical requirements.Try our heater calculator

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Freight delivery

We help coordinate heavy-freight delivery and provide guidance on receiving and inspecting your shipment.

Ask how the order ships, how it will be unloaded, and what happens if freight arrives damaged.

Installation information

We help provide the manuals, specifications, clearances, and electrical information your installer may need.

Find out what documentation and project support will be available after checkout.

After the sale

Questions after delivery? We help with troubleshooting, documentation, warranty coordination, and manufacturer support.Read customer reviews

Ask who you will actually contact if something doesn't work after the order arrives.

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Lifetime Expert Support

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

Authorized Harvia Retailer

Sold by Topture, with the applicable manufacturer warranty.

Full-Value Freight Protection

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

STILL UNSURE?

Frequently Asked Questions

What comes with the Harvia Linear 18 Compact, and what else does it need?

The Harvia Linear 18 Compact ships as the wood-burning stove with its glass door, ash box, grate and flue connecting pipe, 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 and the WL100 bedding as options, sold separately.

What size sauna does the 14.3 kW Harvia Linear 18 Compact heat?

The Harvia Linear 18 Compact is rated at 14.3 kW and heats sauna rooms of 177–636 cu ft (5–18 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 20, rated for 283–706 cu ft.

What chimney does the Harvia Linear 18 Compact need?

The Harvia Linear 18 Compact 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 Linear 18 Compact installed, and does it need electricity or floor protection?

The Harvia Linear 18 Compact 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 WL100, and a combustible floor needs the bedding plus non-combustible protection in front of the door. Its double shell lets it stand 3.6 in from combustible walls beside and behind the body, but walls above the level of the stove top need 11.8 in, the front 11.8 in and the ceiling 51.2 in (41.3 in under a ceiling shield). 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 Linear 18 Compact?

The Harvia Linear 18 Compact 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. 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 Linear 18 Compact burn, and how hot should the sauna get?

The Harvia Linear 18 Compact takes firewood up to 15.4 in (390 mm) long and 3.1–5.9 in (8–15 cm) across. 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 Linear 18 Compact 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 load and maintain the stones in the Harvia Linear 18 Compact?

The Harvia Linear 18 Compact 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.

What problems do Harvia Linear 18 Compact owners run into, and how are they avoided?

Most problems Harvia's manual lists for the Harvia Linear 18 Compact 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 Linear 18 Compact, and what is it made of?

The Harvia Linear 18 Compact (WKLI18CPTM) is made by Harvia, the Finnish sauna manufacturer; Harvia US Inc. is its warrantor in North America. It has a double-shell, black-painted steel body, a glass door and an ash box, and it is CE marked to EN 15821, the European standard for wood-fired sauna stoves. It measures 17.7 in wide, 20.1 in deep and 30.3–31.5 in high on its adjustable legs, and weighs 139.6 lb (63.3 kg) without stones.

What warranty does the Harvia Linear 18 Compact have?

Harvia's manufacturer warranty covers the Harvia Linear 18 Compact 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 Linear 18 Compact compare with the Linear 16 and the Linear 22 GreenFlame?

The Harvia Linear 18 Compact is the one to choose for a tight room: its double shell lets it stand 3.6 in (92 mm) from walls beside and behind the body, where the Linear 16 needs 11.8 in at the sides and the Linear 22 GreenFlame 15.7 in. It covers the widest range, 177–636 cu ft at 14.3 kW, with 88 lb of stones. The Linear 16 is 17.9 kW for 212–565 cu ft; the Linear 22 GreenFlame is 15.7 kW for 318–636 cu ft, with a large glass door and Harvia's GreenFlame combustion.

Where can you buy the Harvia Linear 18 Compact from an authorized dealer?

Topture is an authorized Harvia retailer and sells the Harvia Linear 18 Compact on its own, with AC3020 stones, the WHP1500 chimney, the WL100 bedding 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 contiguous US, financing through Shop Pay Installments at checkout, and a 30-day return window.

What does a Harvia Linear 18 Compact cost in total, delivered?

The delivered cost of a Harvia Linear 18 Compact 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 contiguous US, so a Linear 18 Compact 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 contiguous 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 contiguous 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.

Double shell: 3.6" (92 mm) to walls beside and behind the body, 11.8" above the stove top
Wide room range, 177 to 636 cu ft
Up to 88 lb of 4–6" stones
Wood-fired: no electrical hookup needed

The Sauna Mastery Protocol Digital Guide

Full-Value Freight Protection

Covered by the manufacturer's warranty

Products are sourced through authorized channels and include the applicable manufacturer warranty, subject to the manufacturer's terms. Terms vary by brand and model, and we'll send you the exact warranty document on request.

If something goes wrong, contact us first: we help troubleshoot and coordinate the claim with the manufacturer.

Contact our team
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.

At delivery, note any damage on the delivery receipt and take photos before the driver leaves, then report it to us within 24 hours.

How freight delivery works Shipping policy
We're here after your purchase, too.

Need help with delivery, installation documentation, heater questions or a warranty issue? Our team can help you find answers and coordinate with the manufacturer when needed.

Contact our team

Harvia Linear 18 Compact 14.3kW Wood Burning Sauna Stove | WKLI18CPTM