When you start shopping for an infrared sauna, one choice comes up fast: far infrared or full spectrum? The price gap between them can be $1,000 or more, so it's worth understanding exactly what you're paying for. Here's the honest breakdown.
The quick answer
Far infrared saunas emit a single, deep-penetrating wavelength that's excellent for core warming, detox sweating, relaxation, and cardiovascular support. Full spectrum saunas add near- and mid-infrared on top of that, targeting skin rejuvenation, wound healing, and soft-tissue recovery. If you want the deepest, most comprehensive experience and don't mind spending more, full spectrum is the upgrade. For most buyers, far infrared alone delivers the benefits they actually came for.
Understanding the three wavelengths
Near infrared (700–1,400nm)
The shortest wavelength. Associated with skin health, cellular regeneration, and wound healing — this is the same range used in red light therapy.
Mid infrared (1,400–3,000nm)
Penetrates soft tissue and joints. Often promoted for inflammation and improving circulation to muscles.
Far infrared (3,000nm+)
The longest wavelength and the workhorse of home saunas. It penetrates deepest into the body, producing that signature warming sweat at a comfortable temperature. This handles detox, relaxation, and cardiovascular benefits.
Far infrared sauna: pros and cons
Pros: More affordable, runs on standard 120V, comfortable lower temperatures, excellent for daily relaxation and recovery, proven sweat response.
Cons: Single wavelength — no dedicated near-infrared for skin/cellular benefits.
Sitvera's far infrared line — like the Purity and Maxwell series — covers this category well for indoor home use.
Full spectrum sauna: pros and cons
Pros: The complete package — near, mid, and far infrared in one cabin. Broadest range of benefits including skin and soft-tissue support.
Cons: Typically $1,000–$2,000 more; larger models may need a dedicated circuit.
If you want full spectrum, the Versa-903VS full spectrum reclining sauna is built for it, with a wide reclining design.
Which one is right for you?
Choose far infrared if: your goals are relaxation, recovery, detox, and cardiovascular wellness, and you want the best value.
Choose full spectrum if: you specifically want near-infrared skin and cellular benefits, and you see this as a long-term "best of everything" investment.
Either way, browse the full Sitvera sauna collection to compare wavelengths, sizes, and pricing side by side.