Expert help that stays with you

Whether you’re choosing one component or planning the whole room, small details can become expensive problems once installation begins. We know the products we sell and the questions to ask early, helping catch mismatched components, overlooked requirements, and installation issues while they are still easy to fix.

Our job does not end when your order ships. We stay available through installation and beyond. If something needs attention, we stay involved, work the problem, and help see it through.

We want you to feel good about choosing Sauna Marketplace long after your first session, and confident recommending us to a friend. That standard guides the advice we give, the products we sell, and the way we take care of our customers.

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

Planning a sauna, or need help with one you purchased from us? Our founders have assembled many of the saunas we sell, visited the manufacturers, and use these products every day. New customers and existing Sauna Marketplace sauna and heater owners can Book a Ben consultation.

Includes

What Is Included

All configurations

Included with purchase

Sauna stove installation and operation manual.

Required separately

Narvi split-face sauna stones, narvi round sauna stones.

Contents vary by configuration. Check the row for the option selected above.

Technical Specifications

Model & Application

Model & Application
Brand	Narvi
Catalog Product	Narvi Kaamos 20 Woodburning Sauna Heater from Finland
Heater Type	Wood-burning sauna stove
Model Number	Kaamos 20
SKU / Part Number	157417

Electrical

Electrical
Rated Power	21kW

Dimensions & Weight

Dimensions & Weight
Depth	19.7"
Minimum Host-Room Height	79.92 in
Product Weight	143 lbs / 275 lbs with Stones

Stone Capacity & Performance

Stone Capacity & Performance
Stone Capacity	132 lbs

Installation Clearances

Installation Clearances
Ceiling-Clearance Reference Height Above Finished Floor	29.92 in
Ceiling-Clearance Reference Plane	Stove Top
Minimum Ceiling Clearance Above Reference Plane	50 in

Included & Required

Included & Required
Included Components	Sauna Stove Installation and Operation Manual 2-Year Limited Warranty
Required, Not Included	Narvi Split-Face Sauna Stones, Narvi Round Sauna Stones

Certifications

Certifications
Certifications & Listings	CE

Warranty

Warranty
Residential Warranty	Warranty

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.

Optional accessories

Optional upgrades and accessories.

Narvi Installation Base 550x620 Black | Adjustable Floor Base for Narvi Wood Stoves Optional accessory; confirm model compatibility and room layout before adding it.
Narvi Flue 15 | Kota Basic Insulated Chimney Kit for 4.7 in Sauna Stove Flues Optional accessory; confirm model compatibility and room layout before adding it.
Narvi Protective Wall 650x1150 Optional accessory; confirm model compatibility and room layout before adding it.
Narvi Stone Cage 250x400 Black | Flue-Mounted Stone Basket for Narvi Wood Stoves Optional accessory; confirm model compatibility and room layout before adding it.

Attachments

Manual

View PDF Download

Gallery

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Narvi Kaamos 20 Woodburning Sauna Heater from Finland

Line	Kaamos Kuru NC

The Narvi Kaamos 20 is a continuous-burning wood sauna heater designed for saunas between 353-706 cubic feet. With a solid steel construction and 132 lbs stone capacity, it provides consistent heat and satisfying steam for traditional sauna bathing.

Build Your Quote:

Line	Kaamos Kuru NC

$1,845.00

Zero Interest Payments:

Pay with HSA/FSA:

Narvi

The Kaamos 20 is a traditional wood-burning sauna heater that combines reliable performance with practical features:

Technical specifications:

Sauna room size: 353-706 cubic feet
Dimensions: 18.9″ W x 19.7″ D x 29.9″ H (adjustable height)
Weight: 143 lbs (without stones)
Stone capacity: 132 lbs
Flue connection: 4.7″ diameter, can connect from top or rear
Construction: Steel with protective coating

Heating characteristics:

Continuous burning design for steady, long-lasting heat
Uses standard firewood (recommended 13″ length, 2″ diameter)
Initial load: 7.7 lbs firewood
Subsequent loads: 5.5-6.6 lbs firewood
Maximum fuel consumption: 15.4 lbs per hour
Adjustable draft control via ash drawer for heat regulation

Installation features:

Adjustable legs for leveling and height adjustment
Minimum 1″ air gap required under heater
Safety clearances: 11.8″ sides, 19.7″ front, 50″ top, 7.9″ rear
Can be installed on concrete floor (minimum 2″ thick)
Requires protective base plate for combustible floors
Compatible with both masonry and manufactured chimney systems (T600 rated)

Maintenance:

Regular ash removal required
Annual chimney cleaning recommended
Stones should be rearranged yearly and replaced every two years
Simple exterior cleaning with damp cloth

The Kaamos 20 follows traditional sauna heater design principles with a focus on reliable operation and proper heat distribution. Its straightforward construction and operation make it suitable for both home and light commercial use.

Expert help that stays with you

Our job does not end when your order ships. We stay available through installation and beyond. If something needs attention, we stay involved, work the problem, and help see it through.

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

Includes