Far Infrared: How Infrared Saunas Heat Your Body
Far infrared (FIR) refers to a specific band of the electromagnetic spectrum with wavelengths between 5.6 and 1,000 micrometers. In the sauna world, far infrared technology uses panels or emitters that produce these invisible light waves to heat your body directly - rather than heating the air around you like a traditional sauna.
Think of it like standing in warm sunlight on a cool day. The air temperature might be 55F, but your skin feels warm because the sun's infrared rays are heating you directly. Far infrared saunas work on the same principle, just at a controlled, consistent output.
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- FD-1 Full-Spectrum Infrared Sauna - $4,695
- FD-3 Full Spectrum Infrared Sauna - $6,495
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How Far Infrared Differs from Traditional Sauna Heat
In a traditional sauna, a heater warms stones, the stones radiate heat into the air, and the hot air heats your body from the outside in. Room temperatures typically reach 170-200F.
Far infrared saunas skip the middle step. The FIR panels emit radiant energy that penetrates your skin by 1.5 to 2 inches, warming your body from the inside out. Because the air doesn't need to get as hot, infrared sauna temperatures typically range from 120-150F - noticeably cooler than traditional saunas, though you still sweat heavily.
This lower ambient temperature makes infrared saunas more tolerable for people who find traditional sauna heat overwhelming. Sessions can also run longer (30-45 minutes vs 15-20 minutes) since the lower air temperature is less taxing on your respiratory system.
Potential Benefits
Research on far infrared therapy has shown promise for several areas:
- Improved circulation and blood flow
- Pain relief, particularly for chronic conditions like arthritis and fibromyalgia
- Detoxification through deep sweating
- Skin health improvements
- Relaxation and stress reduction
That said, Keep in mind that much of the strongest sauna research - the Finnish cardiovascular studies, the longevity data - was conducted using traditional high-temperature saunas. The two types of sauna produce real but somewhat different physiological responses. Traditional saunas create a stronger cardiovascular workout due to the higher temperatures.
Far Infrared vs Near Infrared vs Full Spectrum
You'll see these terms thrown around by infrared sauna companies. Near infrared has shorter wavelengths (0.7-1.4 micrometers) and penetrates slightly deeper. "Full spectrum" saunas claim to emit near, mid, and far infrared. In practice, most of the therapeutic benefit comes from the far infrared range, and the distinction matters less than the overall build quality and emitter output of the unit.
Related Terms
- Chromotherapy - LED light therapy in saunas
- Electric Sauna Heater
- Heat Shock Proteins
- Contrast Therapy
- Sauna Session Length
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Whether you prefer traditional heat or infrared, SweatDecks has you covered. Browse our infrared saunas or explore our full sauna collection to find the right fit for your home.
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Use this article as a starting point, then check current product specifications, manufacturer instructions, delivery requirements, warranty terms, and maintenance expectations. Sauna and cold plunge projects can involve heat, water, electricity, ventilation, structural support, and personal health considerations, so the best next step is often to confirm details with the appropriate qualified professional before purchase or installation.
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