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Harvia 20 wood-burning Sauna Heater | Internal & external firing

by Harvia
€1.051,00

incl. VAT

🚚 Free shipping to the EU mainland & Switzerland for orders over €300

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Harvia 20 Series – Your entry into the world of wood-fired sauna heaters 

Experience the authentic warmth of a Finnish sauna heater with the Harvia 20 series. These heaters stand for the highest quality, durability, and an incomparable sauna experience. Whether you have a Barrel Sauna, Outdoor Sauna, or classic sauna, Harvia has the right heater for you. 

Why the Harvia 20 series is the perfect choice

Powerful and efficient

With an output of18 to 26.1 kW, the Harvia 20 series heats your sauna quickly and evenly. Whether you have a small or medium-sized cabin, these heaters are perfect for rooms with a volume of 8 to 20 m³.

High-quality materials and workmanship

The stoves are made of stainless steel and have been designed for a long service life. The robust design can withstand high temperatures and guarantees you a durable product.

Tradition meets modernity

Enjoy the crackling wood fire and the pleasant warmth—a feeling that only wood-fired sauna stoves can provide. At the same time, the stoves offer practical features such as large viewing windows through which you can watch the fire and optional accessories for even more comfort.

Sustainable and environmentally friendly

With efficient combustion and sophisticated design, Harvia 20 sauna heaters consume less wood while still offering maximum performance.

Perfect for German requirements

Many models in the Harvia 20 series can be equipped with a BImSchV kit to meet German environmental requirements. So nothing stands in the way of your sauna experience!

The advantages at a glance:

  • Versatility: Suitable for barrel saunas, Outdoor Saunas, and classic sauna cabins. 
  • Efficiency: Fast heating and long-lasting warmth. 
  • Elegant design: Fits seamlessly into any sauna concept. 
  • Safety: A safety handle and well-thought-out design protect against overheating. 
  • Heat distribution: Uniform temperatures for a comfortable sauna experience. 
  • Easy maintenance: Large cleaning openings make maintenance easy. 

Harvia – A brand with tradition

Harvia is a Finnish family business with over 70 years of tradition. It stands for innovation, craftsmanship, and a love of saunas. With the Harvia 20 series stoves, you can bring a piece of this history into your home. 

Technical highlights of the Harvia 20 series:

  • Power: 18–26.1 kW
  • Cabin size: For volumes from 8 to 20 m³
  • Material: Stainless steel
  • Combustion chamber size: For logs up to 51 cm in length
  • Stone quantity: Maximum 40 kg
  • Distances: Safe distance from walls and ceiling, adapted to modern safety standards

Your step towards the perfect sauna

Whether you are planning your first sauna or looking for an upgrade, the Harvia 20 series is the right choice for you. What are you waiting for? Start your own personal wellness oasis now with a wood-fired Sauna Heater that combines tradition, quality, and comfort. 

 A chimney sweep should be consulted before purchasing a wood-burning stove, regardless of country-specific legal regulations.
Main differences between the models at a glance:
Model Service Firing Water boiler
Connection
BImSchV-
compliant
Ideal for
20 Duo 18 kW Externally fired No No Medium-sized saunas (8-20 m³)
20 Pro 24.1 kW Indoor heating No Optional Fast heating, all-rounder
20 Pro SL 24.1 kW Externally fired No Optional BarrelOutdoor Saunas (8-20 m³)
20 RS Pro 26.1 kW Indoor heating On the right-hand side No Large cabins, water connection
20 LS Pro 26.1 kW Indoor heating On the left No Large cabins, water connection
20 ES Pro 26.1 kW Indoor heating Integrated Optional Saunas with water requirements

Which differences are particularly important to you?

  • Firing: Internal or external firing – externally fired models such as the Duo or Pro SL are perfect if you want a separate heating chamber.
  • Performance: The 20 Duo (18 kW) is sufficient for smaller saunas, while models such as the 20 Pro or the RS/LS variants with up to 26.1 kW provide more intense heat for large cabins.
  • Additional features: Some models (e.g., ES and RS/LS) offer water connections or integrated boilers—ideal for added convenience.
Specifications

Harvia 20 Duo Harvia 20 ES Pro Harvia 20 LS Pro Harvia 20 Pro Harvia 20 Pro S Harvia 20 RS Pro
Width 430 mm 430 mm 580 mm 430 mm 430 mm 580 mm
Height 760 mm 760 mm 760 mm 760 mm 760 mm 760 mm
Depth 510 mm + 280 mm 650 mm 510 mm 510 mm 510 mm + 210 mm 510 mm
Weight 80 kg 75 kg 65 kg 60 kg 70 kg 65 kg
Service 18 kW 26.1 kW 24.1 kW 24.1 kW 24.1 kW 24.1 kW
Operating instructions Operating instructions 20 Duo Operating instructions 20 ES Pro Operating instructions 20 LS Pro Operating Instructions 20 Pro Operating Instructions 20 Pro Operating instructions 20 RS Pro
Declaration of performance Performance declaration 20 Duo Performance declaration 20 ES Pro Performance declaration 20 LS Pro Declaration of performance 20 Pro Declaration of performance 20 Pro Performance declaration 20 RS Pro