What Is an Infrared Sauna? How It Works

A Sauna That Heats You, Not the Air

An infrared sauna uses infrared heating panels to warm your body directly rather than heating the surrounding air the way a traditional sauna does. Because the heat reaches you instead of filling the room, it can produce a satisfying sweat at noticeably lower air temperatures, which is the defining feature that sets infrared apart.

How the Heat Works

Radiant infrared energy is absorbed by your skin and warms you from the surface inward, so the cabin air can stay relatively cool while you still heat up and sweat. Infrared saunas typically run around 120-150F, well below the 150-195F of a traditional Finnish sauna. The air also stays very dry, with none of the steam you would get from pouring water on stones.

• Direct heating: panels warm your body, not the air
• Lower temperature: roughly 120-150F
• Dry air: minimal humidity

Far vs Full Spectrum

Infrared comes in different wavelengths. Far-infrared is the most common in home cabins and is what most people picture when they think of an infrared sauna. Full-spectrum units add near and mid-infrared wavelengths as well. The practical differences are nuanced, and our guide on far vs near infrared breaks them down further.

The Typical Experience

Sessions tend to feel mild and breathable rather than blistering. You sit in a wood-lined cabin while the panels warm you, and the gentler heat means many people stay in comfortably for a full session without the sharp intensity of high-temperature steam heat. It is a quiet, low-key way to warm up and sweat.

Pros to Consider

Infrared saunas are popular for practical reasons, especially for home use where simple setup and gentle heat matter.

• Easy install: many plug into a standard household outlet, with no plumbing or special heater
• Gentle heat: lower temperatures can feel more approachable
• Quick to use: they often warm up faster than a traditional cabin

Who It Suits

Infrared is a good fit for people who want a comfortable, low-temperature sweat, who value an easy home installation, or who find very high heat hard to tolerate. Sauna use in general is associated with relaxation and recovery, though such benefits are mostly observational, so set expectations accordingly. To compare models, see the best infrared saunas.