Large-Room Capacity
The standard Harvia 50 and 50 SL are designed for substantial sauna rooms rather than compact household spaces.
Harvia 50 Wood-Burning
Built for Bigger Rituals.
A powerful graphite-black wood-burning family created for large sauna rooms, shared bathing traditions, and spaces where generous capacity and enduring heat matter.
Deep Heat. Generous Capacity.
Made for the Larger Sauna.
Harvia 50 belongs to a different scale of wood-fired sauna. Its tall graphite-black body, substantial steel construction, and traditional glass firebox give it the grounded presence of a classic Finnish lodge heater. Beneath that vintage character is a high-capacity system designed to warm large rooms and serve groups of bathers with stable, evenly distributed heat.
The family includes a conventional in-room heater, an SL through-the-wall model for tending the fire from beyond the sauna, and a separate 50-litre wood-fired cauldron for heating water in cottages, washhouses, lakeside saunas, and other traditional bathing environments.
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Vendor: Harvia
Harvia Cauldron 50L Wood Burning Heater With Cover | Steel | WP500
Regular price $1,765.00 -
Vendor: Harvia
Harvia 50 SL Black Wood burning Heater with External Feed | WK500SL
Regular price $8,037.00 -
Vendor: Harvia
Harvia 50 Wood Burning Sauna Stove, Black | WK500
Regular price $7,587.00
Capacity with a Purpose
A Greater Stone Mass. A Longer, More Even Heat.
Generous Stone Capacity
A substantial quantity of sauna stones stores heat and helps release it more evenly into a large bathing space.
Serious Wood-Fired Output
The heater is built to meet the demands of a larger room and the repeated bathing cycles associated with groups and professional environments.
Built Around Groups
Well suited to retreat properties, sports facilities, hospitality settings, community saunas, and large private sauna rooms.
Fire Within the Sauna
Harvia 50. Substantial by Design.
The standard Harvia 50 keeps the firebox and the act of tending the wood inside the sauna room. Its large, graphite-black structure feels rooted in older Finnish public and lodge saunas, where the heater was expected to carry the atmosphere of an entire room rather than disappear into the background.
A high stone capacity helps distribute warmth across a large space and supports abundant steam for groups of bathers. The visible fire gives the otherwise restrained black structure a warm focal point, balancing industrial strength with the living movement of flame.
Best Suited To
Large private saunas, retreat properties, camp centres, sports facilities, hospitality businesses, and other group-bathing environments where the heater can be tended from inside the sauna room.
Tend the Fire from Beyond the Sauna
Harvia 50 SL. Capacity with Separation.
Harvia 50 SL carries the same large-room output and generous stone capacity into a through-the-wall format. Its extended firebox allows the wood to be loaded from an adjoining room or from outside the sauna building, depending on the installation.
This can keep firewood, ash, and repeated firebox loading outside the bathing room while allowing staff, hosts, or property owners to manage the fire without continually entering the sauna. It is particularly useful where the heater serves large groups or where operational flow matters as much as atmosphere.
Through-the-Wall Planning
The SL model requires a correctly constructed wall opening, appropriate heat protection, clearances, chimney planning, and installation according to the applicable Harvia documentation and local requirements.
Wood-Heated Water, Far from the Ordinary
Harvia 50 L Cauldron. Warm Water Beyond the Grid.
The Harvia 50 L Cauldron is not a sauna-stone heater. Its fire chamber directs heat beneath a removable stainless-steel inner vessel, warming up to 50 litres of water for traditional washing and bathing environments.
It is especially relevant to lakeside saunas, remote cottages, cabins, outdoor washhouses, retreat properties, and other settings where conventional hot-water service may be limited or intentionally absent. The cauldron restores an older rhythm of heating water directly by fire, giving practical utility the atmosphere of a traditional Finnish sauna ritual.
Important Distinction
The cauldron is designed to heat water rather than sauna stones. It should not be selected as the primary heater for warming a sauna room unless a separate, appropriately sized sauna heater is also installed.
An Essential Part of Your Wood-Burning Installation
Your Heater Needs a Proper Venting Path.
Choosing the 50 heater is only one part of planning a complete wood-burning sauna system. The heater must connect to an appropriate chimney and flue path designed for the installation around it. Explore compatible chimney and pipe components as you plan how smoke and combustion gases will travel safely from the heater to the exterior.
Do not treat the chimney as an optional accessory. Your final venting configuration depends on the heater, building structure, clearances, route to the exterior, and applicable installation requirements. Confirm the complete system with a qualified professional before installation.
Continue Through Harvia
Choose Where the Ritual Leads Next.
Continue exploring Harvia heaters, complete sauna environments, and the wider collection of products created around heat, restoration, and authentic sauna living.
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Certain videos, product photography, trademarks, and demonstration materials displayed on this page are official Harvia Plc assets and remain the intellectual property of their respective owner. They are presented by Between Living, an authorized Harvia dealer, to support product education and informed purchasing decisions.
