10/16/2026
Two infrared saunas can both be called *full-spectrum* and still be built very differently.
That's because full-spectrum tells you which infrared ranges a sauna delivers: near, mid, and far. What it doesn't tell you is how those ranges are produced.
And that's an important distinction when you're comparing saunas for your home.
With the JNH Tosi, the engineering is right there for you to see. Two different emitter technologies work together to deliver all three infrared ranges, with each serving a specific purpose within the system.
It's a good example of why looking beyond a feature list matters. The specifications tell you what's included, but understanding the technology gives you a clearer picture of what you're actually choosing.
Take a closer look inside Tosi and see how its full-spectrum infrared system comes together.