Full Spectrum vs. Far Infrared Sauna: What’s the Difference?

If you’ve started researching infrared saunas for your home, you’ve probably come across terms like far infrared and full spectrum.

At first glance, the difference can be confusing. Both are types of infrared saunas, but they may use different infrared wavelengths and heater configurations.

Understanding what those terms mean—and what else you should compare—can make shopping for a home sauna much easier.

What Is an Infrared Sauna?

Infrared saunas use heaters that emit infrared radiation, a form of electromagnetic energy.

Unlike traditional saunas, which primarily heat the air inside the sauna, infrared heaters transfer radiant energy to surfaces and the body.

Infrared radiation is commonly divided into different wavelength ranges, including near, mid and far infrared.

This is where the distinction between far infrared and full spectrum begins.

What Is a Far Infrared Sauna?

A far infrared sauna, often abbreviated FIR, primarily uses far-infrared wavelengths.

Far infrared is commonly used in home infrared saunas and can provide a warm sauna environment at lower ambient air temperatures than many traditional saunas.

Far-infrared saunas are available in many configurations, from compact one-person models to larger multi-person saunas.

When comparing models, pay attention to the number and placement of heaters, overall sauna dimensions, electrical requirements and manufacturer specifications.

What Is a Full-Spectrum Sauna?

A full-spectrum infrared sauna is designed to incorporate multiple infrared wavelength ranges—typically near, mid and far infrared.

Depending on the manufacturer and model, different types of heaters may be used to provide those wavelengths.

Because designs vary, two saunas described as “full spectrum” won't necessarily have identical heater configurations.

That's why it's helpful to look beyond the label and review the specifications of each sauna you're considering.

Near vs. Mid vs. Far Infrared

You'll frequently see these three terms when researching full-spectrum saunas.

Near infrared refers to infrared wavelengths closest to visible light.

Mid infrared occupies the range between near and far infrared.

Far infrared refers to longer infrared wavelengths and is commonly used in infrared sauna heating systems.

You may encounter specific wellness or health claims associated with different infrared wavelengths. Keep in mind that marketing claims can vary considerably between manufacturers.

When shopping, focus on the actual sauna specifications, heater design and features rather than assuming a particular wavelength automatically makes one sauna the right choice for you.

Full Spectrum vs. Far Infrared: What's the Main Difference?

The simplest distinction is the range of infrared wavelengths the sauna is designed to provide.

A far-infrared sauna primarily uses far-infrared energy.

A full-spectrum sauna is designed to incorporate near, mid and far infrared.

But infrared spectrum isn't the only difference that matters when choosing a sauna.

Two models can differ considerably in size, heater placement, electrical requirements, construction and features—even if they're both labeled full spectrum.

What About EMF Levels?

While comparing infrared saunas, you'll probably also encounter terms such as low EMF, ultra-low EMF and near-zero EMF.

EMF stands for electromagnetic field.

Electrical equipment—including infrared sauna components—can produce electromagnetic fields. Manufacturers may provide EMF measurements or classifications for their sauna models.

However, terminology and testing methods can vary.

If EMF specifications are important to you, review the manufacturer's published information for the exact sauna you're considering rather than assuming all saunas within a category have the same measurements.

Compare Heater Placement

One detail that's easy to overlook is where the infrared heaters are located inside the sauna.

Depending on the model, heaters may be positioned along the walls, behind the seating area, near the legs or in other locations.

The number, type and placement of heaters can vary considerably between sauna models.

When comparing two saunas, looking at the heater configuration can sometimes tell you more than simply comparing their marketing names.

Don't Forget Sauna Size

Heating technology matters, but so does comfort.

Home infrared saunas are available in sizes ranging from compact one-person units to larger multi-person models.

Before purchasing, consider:

• How many people will normally use the sauna
• Available floor space
• Interior dimensions
• Exterior dimensions
• Door clearance
• Ceiling height
• The route the sauna components will take into your home

Don't choose solely based on the advertised person capacity. Compare the actual dimensions.

Check Electrical Requirements

Electrical requirements can differ among infrared saunas.

Some smaller models may have relatively straightforward residential electrical requirements, while larger or more powerful models may require a dedicated circuit, different voltage or additional electrical work.

Always review the manufacturer's requirements for the specific model you're considering.

If you're unsure whether your electrical setup is appropriate, consult a qualified electrician before purchasing.

Compare Features That Matter to You

Infrared saunas can include a variety of convenience and comfort features.

Depending on the model, you may find features such as:

• Digital controls
• Interior or exterior lighting
• Chromotherapy lighting
• Bluetooth or audio systems
• Different heater configurations
• Interior reading lights
• Various seating layouts

Features can be enjoyable, but they shouldn't replace the fundamentals.

Start with sauna size, heating technology, heater configuration, electrical requirements and construction, then compare the additional features.

Is Full Spectrum or Far Infrared Right for You?

There isn't one answer that fits every home.

A far-infrared sauna may appeal to someone who wants a straightforward infrared sauna setup and doesn't specifically need multiple infrared wavelength ranges.

A full-spectrum sauna may appeal to someone who specifically wants a sauna designed to incorporate near, mid and far infrared technologies.

Your available space, preferred features, electrical setup, sauna size and budget should also be part of the decision.

Compare Infrared Saunas for Your Home

Choosing between full spectrum and far infrared is easier once you understand what the terminology means.

Instead of focusing on one specification, compare the entire sauna: infrared technology, heater configuration, dimensions, electrical requirements, construction, features and warranty.

That approach can help you narrow down the models that best fit your home and preferences.

Ready to compare your options? Browse our infrared and full-spectrum home saunas to explore available sizes, features and configurations.