Far Infrared vs Full Spectrum Saunas: What’s the Real Difference?

Not all infrared saunas are created equal. If you're researching home saunas, you've probably come across terms like far-infrared, near-infrared, and full-spectrum infrared. But what do these mean—and which type is best for your health goals?

In this guide, we break down how each infrared wavelength affects your body, the pros and cons of each, and how to choose the right type of sauna for your space and wellness priorities.

Understanding Infrared Light

Infrared light is a type of heat energy invisible to the naked eye. It’s divided into three categories:

• Near-Infrared (NIR): 700–1,400 nm
• Mid-Infrared (MIR): 1,400–3,000 nm
• Far-Infrared (FIR): 3,000–10,000 nm

Each type penetrates the body at different depths and interacts with tissues in different ways.

Far Infrared Saunas

Far-infrared saunas are the most common type on the market. They use carbon or ceramic heaters that emit wavelengths that penetrate up to 1.5 inches into the body. This produces a deep, detoxifying sweat at lower ambient temperatures—usually around 120–140°F.

• Great for detoxification and cardiovascular benefits
• Heats the body, not the air—ideal for people who prefer a gentler sauna experience
• Most Dynamic and Maxxus saunas are typically FIR-only

→ Browse Far Infrared Saunas

Mid-Infrared Saunas

Mid-infrared penetrates a bit deeper into soft tissue than far-infrared and is often associated with muscle and joint pain relief. It’s a less common technology on its own, but is typically found in full-spectrum saunas.

• Targets muscles, tendons, and joints
• Helps with inflammation and recovery
• Often included in higher-end Finnmark Designs full-spectrum saunas

Near-Infrared Saunas

Near-infrared (NIR) light is the shallowest penetrating infrared wavelength, but it has powerful cellular effects. It is absorbed by the skin and stimulates mitochondrial activity, which may help with skin health, anti-aging, and cellular repair.

• Often used in red light therapy panels
• Great for skin rejuvenation, wound healing, and collagen production
• Not all saunas labeled “infrared” offer NIR—you need full-spectrum or hybrid models

→ Shop Sauna Red Light Panels

Full Spectrum Infrared Saunas

Full-spectrum saunas combine near, mid, and far infrared wavelengths in one unit. This offers the widest range of therapeutic benefits—from detox and recovery to skin support and anti-inflammatory effects.

Brands like Finnmark and Golden Designs and some Dynamic saunas lead the category with certified near zero-EMF full-spectrum systems built for serious wellness users and biohackers.

→ Shop Full Spectrum Saunas

Far vs Full Spectrum: Which Should You Choose?

• Choose Far-Infrared if you want an affordable, gentle, and detox-focused sauna that’s easy to install and maintain.
• Choose Full-Spectrum if you’re targeting skin health, muscle recovery, chronic inflammation, or want the most complete wellness experience available.

Still unsure? Use our infrared selector tool for tailored recommendations or reach out via live chat—we’ll help you find the perfect fit.

Browse by Infrared Type

• → Far Infrared Saunas
• → Full Spectrum Saunas
• → Red Light Panels for NIR Support