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Small details become expensive problems once installation begins. We ask the questions early, so a mismatched part, an overlooked requirement or an installation issue gets caught while it is still easy to fix.

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Sauna and heater customers also receive free shipping on sauna accessories for life.

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Includes

What Is Included

Includes the product and configuration selected above. Hardware, controls, stones, venting, and accessories are not included unless specifically listed.

See How It Fits for required and compatible products.

Technical Specifications

At a Glance

At a Glance
Heat Source	Wood-burning
Sauna Room Size	318 to 636 cu ft
Sauna Ceiling Height	At least 82.7 in floor to ceiling
Power	15.7 kW
Mounting	Floor-standing
Loading	Inside the sauna
Stones	88 lb
Warranty	2 years home use
Made in	Finland

Model & Application

Model & Application
Brand	Harvia
Catalog Product	Harvia Linear 22 GreenFlame
Heater Type	Wood-burning sauna stove
Current Harvia Item Number	WKLI20GM
Product Family	Linear 22 GreenFlame / current Harvia surface: Linear 22 Vision
Made In	Finland

Sauna Sizing

Sauna Sizing
Sauna Room Volume	318–635 ft³

Fuel & Venting

Fuel & Venting
Fuel	Wood

Dimensions & Weight

Dimensions & Weight
Heater Dimensions	17.72 in W × 20.08 in D × 30.31 in H
Net Weight	145.5 lb
Minimum Room Height	6.9 ft

Stone Capacity & Performance

Stone Capacity & Performance
Power Output	15.7 kW
Stone Capacity	88.2 lb; 4 to 6 in stones

Installation Clearances

Installation Clearances
Front Clearance	19.69 in to combustible or noncombustible material
Rear Clearance	14.96 in combustible; 3.94 in noncombustible
Side Clearance	15.75 in combustible; 3.94 in noncombustible
Clearance to Ceiling	4.15 ft

Materials & Finish

Materials & Finish
Main Material	Steel

Certifications

Certifications
Certifications	CE, EAC

Use the attached current manual and a qualified installer for final sizing, wiring, clearances, venting, and local-code compliance.

How It Fits

How This Product Fits the System

What it is used for

A wood-burning sauna heater that heats the room and stone mass for traditional löyly. Treat the stove, chimney, floor protection, clearances, combustion air, ventilation, and stones as one installation system.

What to plan

Size from adjusted sauna volume, including the effect of glass, masonry, and other uninsulated surfaces; do not size from floor area alone.
Match the selected model's power or fuel, voltage, phase, circuit, wire, control, stone, and venting requirements before ordering.
Treat clearances, ceiling reference planes, ventilation, guarding, floor protection, and service access as one room-layout decision.
Follow the current installation manual and use a qualified installer.

Required separately

Complete the system with these items.

Harvia Sauna Rocks (can only be purchased with heater) Required for operation; match the version and quantity to this selection.

Optional accessories

Optional upgrades and accessories.

Harvia WZ115155 Wood Stove Pipe Adapter 4.5" Euro to 6" USA Optional accessory; confirm model compatibility and room layout before adding it.
Harvia Chimney Kit in Black or Stainless Steel - WHP4921.3 ft Optional accessory; confirm model compatibility and room layout before adding it.
Saunum AirSolo Optional accessory; confirm model compatibility and room layout before adding it.
Harvia WZ Smoke Pipe, 4.6 in, for Wood-Burning Sauna Stoves (7.9 in, 19.7 in, 3.3 ft) Optional accessory; confirm model compatibility and room layout before adding it.
Harvia WHP270 Insulated Smoke Damper for Steel Chimneys, Stainless or Black Optional accessory; confirm model compatibility and room layout before adding it.
Harvia WHM25 Chimney Vapor Barrier Optional accessory; confirm model compatibility and room layout before adding it.
Harvia WZ115030SP Damper Plate for Wood-Burning Sauna Stoves Optional accessory; confirm model compatibility and room layout before adding it.
Harvia WZ020115 Lead-Through Flange for Smoke Pipes Optional accessory; confirm model compatibility and room layout before adding it.
Harvia AC4000 White Decorative Sauna Stones, 2–3.9 in, 22 lb Box (With Heater Purchase Only) Optional accessory; confirm model compatibility and room layout before adding it.
Harvia WP220ST Pipe-Model Water Heater | 22 L Stainless Steel Optional accessory; confirm model compatibility and room layout before adding it.
Harvia WL110 Protective Bedding for Wood Sauna Stoves | 22 x 25 in Optional accessory; confirm model compatibility and room layout before adding it.

Other heater options

Compare these options; sizing, power, controls, clearances, and stones may differ.

Harvia M3 Wood Fired Sauna Stove A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
Harvia Legend 150 A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
Harvia Legend 240 GreenFlame A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
Harvia Virta Pro 16 | 240V Single‑Phase Commercial Sauna Heater A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
Harvia Club Series A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
Saunum Air L Stainless Climate-Equalizing Sauna Heater A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
EOS Mythos S45 Design Sauna Heater | 12 / 15 kW A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
Harvia M3 SL Wood-Burning Sauna Stove | 16.5 kW Through-Wall Feed (WKM3SL) A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.

Attachments

Current Installation Manual - Harvia Linear 22 GreenFlame - June 2026

Exact Linear 22 GreenFlame installation and operation manual. Exact source bytes and model scope verified by Sauna Marketplace on 2026-08-21.

View PDF Download

Current Data Sheet - Harvia Linear 22 WKLI20GM - June 2026

Exact WKLI20GM technical data sheet. Exact source bytes and model scope verified by Sauna Marketplace on 2026-08-21.

View PDF Download

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Harvia Linear 22 GreenFlame

Name: Harvia Linear 22 GreenFlame
Brand: Harvia
Price: 2464.00 USD
Availability: InStock

Greenflame is Harvia’s environmentally friendly, wood-burning sauna heater. The Greenflame reduces fine particulate emissions by 20 percent, and carbon monoxide emissions by 70 percent compared to similar models.

The large glass hatch of the heater enhances the ambiance while the advanced sauna burning technology and durable construction ensure a more reliable and responsible sauna for years to come.

Build Your Quote:

$2,464.00

Pay over time:

Pay with HSA/FSA:

Harvia Linear 22 GreenFlame

The Harvia Linear 22 GreenFlame (WKLI20GM) is a 15.7 kW wood-burning sauna stove for rooms of 318 to 635 cu ft, with a large glass door on the fire chamber.

It holds up to 88 lb of 4 to 6 in stones and takes firewood up to 15 in long. The flue connects at the top or the back, with a 4.5 in connection opening. The stove measures 17.7 in wide, 20.1 in deep and 30.3 in tall plus adjustable legs, and weighs 145.5 lb. Harvia calls for a sauna room at least 82.7 in high. The attached installation manual covers clearances, chimney connection and floor protection.

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Planning guides: Sauna heater calculator Wood sauna stove guide