HUUM vs Harvia: The Battle of the Sauna Heaters

Every great rivalry has its heavyweights.

Ferrari vs Porsche.

Rolex vs Omega.

Apple vs Samsung.

In the sauna world, the debate is often HUUM vs Harvia.

Both manufacturers produce exceptional sauna heaters. Both have devoted followers. Both are trusted by homeowners, luxury spas and commercial wellness facilities across Europe.

So which one is better?

The honest answer is that neither brand is objectively superior—they simply prioritise different aspects of the sauna experience. If Harvia represents decades of proven engineering and reliability, HUUM represents contemporary Nordic design and a modern interpretation of traditional sauna bathing.

Understanding those differences will help you choose the right heater for your sauna.

Meet the Contenders

Harvia

Founded in Finland in 1950, Harvia has become one of the world's largest sauna heater manufacturers. The company produces everything from compact domestic heaters to large commercial systems found in hotels, spas and public wellness facilities around the world.

Harvia has built its reputation on reliability, engineering and consistency. If you've visited a public sauna almost anywhere in Europe, there's a good chance the heater was made by Harvia.

HUUM

HUUM is considerably younger.

Founded in Estonia, the company has become one of the fastest-growing names in premium sauna design by combining minimalist Nordic aesthetics with traditional sauna principles.

HUUM heaters are instantly recognisable for their sculptural appearance and exceptionally large stone capacity. Rather than hiding the stones inside a metal casing, HUUM celebrates them as the centrepiece of the sauna.

The result is a heater that performs exceptionally well while looking more like a piece of contemporary architecture than a traditional appliance.

Design: Traditional vs Contemporary

This is probably the biggest difference between the two brands.

Harvia heaters are designed with practicality first. Models such as The Wall, Cilindro and Legend are engineered to deliver reliable performance across thousands of hours of operation.

HUUM takes a different approach.

Its DROP, CLIFF and HIVE heaters are designed to become visual features within the sauna itself. Their open stainless-steel structures expose the sauna stones, creating a striking focal point that works particularly well in contemporary glass-fronted saunas.

If appearance is high on your list of priorities, HUUM is difficult to ignore.

Which Produces Better Löyly?

This is where the debate becomes more interesting.

Löyly—the wave of steam created when water is poured over hot sauna stones—is widely regarded as one of the most important characteristics of an authentic Nordic sauna.

The quality of the löyly depends largely on the quantity of stones the heater holds.

HUUM heaters are famous for their exceptionally large stone capacity. The more stones a heater contains, the greater its thermal mass. This allows water to evaporate more gradually, producing softer, longer-lasting waves of steam.

Many sauna enthusiasts describe HUUM's löyly as gentle, balanced and particularly enjoyable during longer sauna sessions.

Harvia has responded to this trend with heaters such as the Legend and Cilindro, both of which also feature large exposed stone baskets capable of producing excellent löyly.

In reality, both manufacturers now produce outstanding steam. The difference is often one of character rather than quality.

Heating Performance

Both brands heat a sauna quickly and efficiently when correctly matched to the room size.

Harvia's reputation has been built on decades of dependable performance in both domestic and commercial environments. Their heaters are known for fast warm-up times, durable construction and straightforward operation.

HUUM heaters typically warm slightly more gradually because of their larger stone mass. However, once fully heated, they retain and release heat exceptionally well, contributing to a smoother, more consistent sauna experience.

For most homeowners, the difference in warm-up time is unlikely to influence the purchasing decision.

Smart Technology

Both manufacturers have embraced smart controls.

Many HUUM heaters can be paired with the UKU control system, allowing users to remotely preheat the sauna, adjust temperatures and manage settings through a smartphone app.

Harvia also offers Wi-Fi-enabled control systems on selected models, giving homeowners similar convenience and remote access.

For buyers building a modern garden wellness space, both brands provide excellent smart functionality.

Which Brand Is Better for Commercial Saunas?

Harvia has the advantage when it comes to commercial installations.

With decades of experience supplying hotels, gyms, spas and public wellness facilities, Harvia offers one of the broadest commercial heater ranges available.

Their reputation for durability, parts availability and long-term reliability makes them a natural choice for high-usage environments.

That doesn't mean HUUM isn't suitable for commercial projects.

Luxury boutique spas and premium wellness centres increasingly specify HUUM heaters because of their design-led appearance and exceptional steam quality. They create an immediate visual impact that aligns perfectly with high-end architecture.

Which Brand Looks Better?

This is entirely subjective.

If you prefer clean engineering and proven functionality, Harvia has an understated confidence that has stood the test of time.

If you're designing a premium outdoor sauna with panoramic glazing and contemporary landscaping, HUUM's sculptural heaters are difficult to match. Many homeowners deliberately position them as the focal point of the sauna rather than hiding them away in a corner.

It's a little like choosing between a beautifully engineered German sports car and a piece of Scandinavian furniture.

Both are exceptionally well designed—they simply express it differently.

Which Should You Choose?

Choose Harvia if you:

• Want a heater with decades of proven reliability.
• Are fitting out a commercial sauna.
• Prefer established engineering.
• Want an extensive range of heater options.

Choose HUUM if you:

• Value contemporary Nordic design.
• Want exceptional stone capacity and soft löyly.
• Are creating a luxury home wellness space.
• Want the heater to become part of the overall aesthetic.

Our View

At Ice Cold Spice, we're often asked which brand we recommend.

The answer is simple—we sell both because they're both excellent.

For customers seeking a timeless, dependable heater backed by more than 75 years of sauna engineering, Harvia remains one of the safest choices on the market.

For those creating a premium architectural sauna where design is just as important as performance, HUUM has become one of Europe's most exciting manufacturers. Its heaters combine beautiful craftsmanship with outstanding löyly, making them a favourite among homeowners looking to create a luxury spa experience at home.

Neither choice is wrong. The best heater is the one that matches how you want your sauna to feel.

Final Thoughts

The HUUM vs Harvia debate isn't really about which heater is "better". It's about deciding what matters most to you.

If your priority is proven reliability, commercial heritage and engineering excellence, Harvia is difficult to beat.

If you're drawn to contemporary Nordic design, larger stone capacity and exceptionally soft löyly, HUUM offers a compelling alternative that has quickly earned a place among Europe's leading premium sauna brands.

Whichever you choose, investing in a high-quality European heater will have a greater influence on your sauna experience than almost any other component. After all, every great sauna begins with great heat—and both HUUM and Harvia have spent decades perfecting exactly that.