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Technical Specifications

Model & Application

Model & Application
Brand	Harvia
Catalog Product	Harvia 50 Wood-Burning Sauna Stove \| 40 kW Commercial Heater (WK500)
Heater Type	Wood-burning sauna stove
Model	Harvia 50 (WK500)

Sauna Sizing

Sauna Sizing
Sauna Room Volume	706 to 1,766 ft³
Rated Output	40 kW

Fuel & Venting

Fuel & Venting
Fuel	Wood
Flue Connection Opening	5.5 in
Flue Outlet Position	Back or top
Minimum Flue Internal Diameter	4.3 in
Required Chimney Temperature Class	T600
Maximum Firewood Length	24 in

Dimensions & Weight

Dimensions & Weight
Heater Dimensions	20.1 in W × 28.3 in D × 41.3 in H
Product Weight	428 lb

Stone Capacity & Performance

Stone Capacity & Performance
Stone Capacity	264 lb (maximum)
Stone Size	4 to 6 in

Installation Clearances

Installation Clearances
Front	19.7 in
Sides	19.7 in to combustible, 3.9 in to non-combustible
Back	19.7 in to combustible, 3.9 in to non-combustible
Ceiling	47.2 in above the stove
Minimum Room Height	88.6 in

Included & Required

Included & Required
Stones	Not included. Six boxes of 4 to 6 in sauna rocks required.
Protective Sheath	None available for this model.

Materials

Materials
Construction	Steel
Color	Black

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

Attachments

Gallery

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Harvia 50 Wood-Burning Sauna Stove | 40 kW Commercial Heater (WK500)

Name: Harvia 50 Wood-Burning Sauna Stove | 40 kW Commercial Stove
SKU: WK500
Price: 7587.00 USD
Availability: InStock

Forty kilowatts is not a home number. The Harvia 50 is what large public rooms get built around: 706 to 1,766 cubic feet of sauna, 264 pounds of stones in the basket, and enough mass to hold the room when a full bench keeps throwing löyly. Black steel, floor-standing, 428 pounds empty, with a 5.5 inch flue collar that can exit the back or the top. Two things are worth settling before you order, and we would rather settle them with you than let a cart guess: the stones are required and sold separately, and the 50 does not share a chimney or a protective sheath with the rest of the Harvia wood line.

Build Your Quote:

$7,587.00

Chimney and sheath: the 50 is the one that is different

This stove takes a 5.5 inch flue collar, not the 4.6 inch collar the rest of the Harvia wood range uses, and the chimney has to be rated to a T600 temperature class. The Harvia smoke pipes, pipe adapters and chimney kits we sell will not fit it, and Harvia builds no protective sheath for this model, so the clearances on this page are the ones you design to. Source the chimney with your installer, or call us first and we will work through it with you.

Add the required stones: Harvia 50

The 50 holds up to 264 lb of 4 to 6 inch stones and none come in the box, which works out to six boxes. Stack them loosely so air can move between them, and plan on restacking once a year. Every stone is a different shape, so a seventh box gives you room to pick the ones that sit well and set the rest aside.

I already have the approved 4 to 6 inch stones

7 boxes, for room to choose the best-fitting stones (308 lb supplied) +$434.00

6 boxes of Harvia AC3020 stones, 44 lb each (264 lb supplied)(+$372.00)

Zero Interest Payments:

Pay with HSA/FSA:

The room decides this one

Most heater questions start with how many people. This one starts with how much air. The
Harvia 50 is rated for 706 to 1,766 cubic feet, which is the range where a club, a bathhouse,
a lodge or a large outdoor build stops being a heater decision and becomes a chimney decision.
Under 700 cubic feet you want a smaller stove and you will be happier with it. In range, there
is very little else that does this job on wood.

264 pounds of stone is the real spec

Output is the number people shop on. Stone mass is the number that decides whether the room
survives a busy Saturday. The 50 holds up to 264 pounds of 4 to 6 inch stones, and that
reservoir is what lets a full bench keep ladling without the temperature falling off a cliff.
Stack them with air gaps rather than packing them tight, and burn the first fire outdoors or in
a well ventilated space so the factory paint gases off before the stove goes in the room.

Read this before you buy a chimney

The 50 is the exception in the Harvia wood line, and it is the detail that catches people.
Its connection opening is 5.5 inches, not the 4.6 inch collar the rest of the range uses, so
the Harvia smoke pipes and chimney packages we sell for the M3, Legend, Pro and Linear stoves
will not fit it. The flue pipe needs a minimum internal diameter of 4.3 inches and the chimney
has to be rated to a T600 temperature class. Harvia also builds no protective sheath for this
model, so the clearances below are the ones you design to rather than numbers you can shorten
with a shield. Settle the venting with your installer and your local code before the stove
ships, not after it lands.

Clearances and fit

Front: 19.7 inches
Sides: 19.7 inches to combustible material, 3.9 inches to non-combustible
Back: 19.7 inches to combustible material, 3.9 inches to non-combustible
Ceiling above the stove: 47.2 inches
Minimum room height: 88.6 inches
Firewood: up to 24 inches long
Stove: 20.1 inches wide, 28.3 inches deep, 41.3 inches tall, 428 pounds empty

Required, and not included

The stove ships without stones. Harvia’s stone chart calls for 264 pounds of 4 to 6 inch
rock, which is six boxes of Harvia
Sauna Rocks. Every natural stone is a different shape, so order a seventh box if you want
room to choose the ones that sit well and set the rest aside. Stones ship with the heater
order.

Before you order

This is a freight stove on a pallet, going into a room somebody is going to run hard for
years, and the two things that go wrong are the flue and the stone count. We know these heaters
about as well as anyone outside of Europe does, and we would rather spend ten minutes on the
phone getting your chimney class and your room volume right than sell you a stove that fights
its room. Call us at (844) 565-1113 and we will size it with you.

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.

Technical Specifications