Löyly: Finland’s Sauna Secret, Confirmed by Science
In many parts of the world, sauna means sitting in dry heat without adding water to the stones. In Finland, it has always been different. Löyly – the steam created by pouring water onto hot sauna stones – is considered the heart of the sauna experience. Now, scientific research is confirming what Finns have understood for generations.
New Research Shows Sauna Humidity Has a Direct Effect on the Body
A new study from the University of Jyväskylä has shown that sauna humidity has an independent impact on the body’s response to heat.
The research found that higher humidity in the sauna:
- increases heart rate
- raises body temperature
- intensifies the physiological effects of heat exposure
This means that löyly is not just about tradition, atmosphere, or comfort. It is an essential part of what makes the Finnish sauna experience unique.
Why Does Löyly Feel Different?
When water is poured onto hot sauna stones, it instantly turns into steam and increases the humidity of the sauna. Higher humidity reduces the evaporation of sweat from the skin, allowing the body to warm up more effectively.
This is why an 80°C sauna can feel completely different depending on whether it is a dry heat or a sauna filled with soft, humid löyly.
The combination of heat, humidity, and controlled exposure creates the distinctive sauna sensation that has made Finnish sauna culture famous around the world.
Finnish Sauna Culture Is Built Around Löyly
In Finland, löyly is much more than steam. It represents the balance between heat, relaxation, recovery, and connection. The word itself has no perfect translation in many languages because it describes an experience rather than just a physical phenomenon.
For centuries, Finns have understood that adding water to the sauna stones transforms the entire experience. Today, science is helping explain why.
Desavu – Bringing Authentic Finnish Sauna Experience to the World
At Desavu, we believe that a true sauna experience comes from understanding the details that matter: the right heat, the right humidity, quality sauna materials, and the perfect balance between tradition and modern design.
A well-designed sauna allows you to experience soft, natural löyly – the same authentic sauna feeling that has been part of Finnish culture for centuries.
So the next time you pour water onto the sauna stones, remember: you are not only following a Finnish tradition. You are creating the very element that makes sauna such a unique and powerful experience.
Planning your own sauna?
Desavu creates bespoke design saunas, floating saunas and offers expert sauna consulting to help you achieve the perfect balance of heat, humidity, materials, and atmosphere. Whether you are building a private home sauna or a larger wellness space, our expertise ensures an authentic Finnish sauna experience with the perfect löyly every time.
