Full Spectrum Infrared Saunas

A full spectrum infrared sauna uses near-infrared (NIR), mid-infrared (MIR), and far-infrared (FIR) wavelengths within the same sauna system.

Far infrared provides the primary whole-body heating experience, while near- and mid-infrared expand the range of infrared wavelengths delivered during a session. The way those wavelengths are produced can vary by manufacturer, which is why heater type and emitter design matter when comparing full spectrum saunas.

A far infrared sauna primarily uses far-infrared wavelengths to deliver infrared heat throughout the cabin.

A full spectrum sauna combines far infrared with near- and mid-infrared wavelengths.

Neither type is automatically better. Far infrared may be the better fit for someone primarily interested in consistent whole-body infrared heat, while full spectrum is designed for users who want exposure to a broader range of infrared wavelengths.

JNH Lifestyles combines carbon-fiber infrared heaters with dedicated LED emitters.

The carbon-fiber heaters provide infrared heat throughout the sauna cabin, while the LED emitters provide targeted near-infrared output. This allows the different technologies to serve separate functions within the same full spectrum sauna system.

No. “Full spectrum” describes the presence of near-, mid-, and far-infrared wavelengths, but manufacturers can deliver those wavelengths using different technologies.

Some systems use halogen or quartz emitters, while JNH uses carbon-fiber heaters together with precision LED emitters. When comparing full spectrum infrared saunas, it is important to look beyond the label and consider how each wavelength is actually produced and delivered.

Not necessarily. The right choice depends on what you want from your sauna.

A far infrared sauna may be a strong choice if your priority is consistent infrared heating and a simpler sauna system. A full spectrum sauna may be a better fit if you want near-, mid-, and far-infrared wavelengths in the same session.

Other factors, including temperature range, heater placement, EMF performance, cabin size, materials, electrical requirements, and intended placement, should also be considered.

No. Full spectrum infrared and red light therapy are not the same technology.

Full spectrum refers to the combination of near-, mid-, and far-infrared wavelengths used within a sauna.

Red light therapy uses dedicated light emitters designed to deliver specific red and near-infrared wavelengths. Select Arki™ saunas combine full spectrum infrared with dedicated full-body red light therapy, while Tosi™ models focus on full spectrum infrared sauna technology.

LED emitters allow near-infrared wavelengths to be delivered separately from the sauna's primary heating system.

JNH pairs LED-based near-infrared delivery with carbon-fiber infrared heaters so the heating system and near-infrared emitters can perform different roles within the same sauna.

This also allows JNH to provide full spectrum infrared without relying on halogen or quartz heaters.

Yes, depending on the model.

JNH offers full spectrum infrared saunas with different temperature ranges. Standard Tosi™ models are designed for infrared sauna temperatures up to 140°F, while Tosi™ 360° and select Arki™ models are designed for high-heat performance up to 170°F.

Full spectrum technology and maximum sauna temperature are separate specifications, so shoppers should consider both when comparing models.

Yes. A full spectrum infrared sauna does not need to reach 170°F in order to provide near-, mid-, and far-infrared wavelengths.

The preferred temperature depends on the user. Some people prefer the more moderate heat of a sauna designed to reach up to 140°F, while others specifically want the more intense experience of a high-heat infrared sauna reaching up to 170°F.

EMF refers to electromagnetic fields produced by electrical components.

An ultra-low EMF sauna is designed to reduce electromagnetic field exposure around the user during operation. Because EMF measurements can vary depending on distance from the heater and where the reading is taken, shoppers should look at both the reported measurement and the testing methodology rather than relying on the phrase “low EMF” alone.

JNH provides EMF information and testing data to help buyers compare sauna performance more accurately.

No. Infrared heater coverage varies by model.

Tosi™ 360° and select Arki™ models are designed to provide infrared coverage from multiple directions around the user, while standard Tosi™ models use a more traditional full spectrum heater configuration.

If 360° infrared coverage is important to you, compare the heater layout and model specifications before choosing a sauna.

Both collections provide full spectrum infrared sauna technology, but they are designed for different preferences.

Tosi™ models provide full spectrum infrared with ultra-low EMF performance and temperatures up to 140°F.

Tosi™ 360° models add 360° infrared coverage and are designed for users who want a more enveloping heating experience together with high-heat performance up to 170°F.

Tosi™ focuses on full spectrum infrared sauna technology, while Arki™ combines full spectrum infrared with dedicated full-body red light therapy.

Select Arki™ models also offer high-heat performance up to 170°F and 360° infrared coverage.

Tosi™ may be the better fit for someone primarily interested in full spectrum infrared, while Arki™ is designed for buyers who want infrared sauna technology and red light therapy in the same system.

Look beyond the phrase “full spectrum.”

Important factors include:

• How near-, mid-, and far-infrared wavelengths are delivered
• Heater type and placement
• Maximum temperature
• EMF performance and testing methodology
• Cabin size and seating capacity
• Wood and cabin materials
• Electrical requirements
• Indoor or outdoor placement
• Warranty and long-term support
• Whether red light therapy is included or separate

Comparing these specifications makes it easier to determine which full spectrum sauna is the best fit for your space, heat preference, and intended use.

Choose based on the type of experience and features you want.

• Choose Tosi™ if you want full spectrum infrared, ultra-low EMF performance, and infrared heat up to 140°F.
• Choose Tosi™ 360° if you want full spectrum infrared with 360° coverage and high-heat performance up to 170°F.
• Choose Arki™ if you want full spectrum infrared combined with dedicated full-body red light therapy.

You should also compare cabin capacity, available space, electrical requirements, wood preference, and whether the sauna will be installed indoors or outdoors.