Shop for an infrared sauna and two labels show up on almost every listing: full spectrum and low EMF. Full spectrum saunas often cost more than far infrared models of a similar size, and low EMF is presented as a must-have. This guide explains what each term actually describes, what it doesn’t, and how to compare listings on the specs that matter for a home sauna.
Quick answer: a far infrared sauna heats you mostly with flat carbon or ceramic panels that emit far infrared. A full spectrum sauna adds near and mid infrared emitters, often lamps, to those panels. That changes the feel of the heat and often adds features, but research comparing the two for health outcomes is limited. Low EMF is a listing claim about magnetic field levels near the heaters. It’s worth asking how the seller measured it, but it isn’t a regulated rating. For most buyers, size, build, electrical needs and warranty matter more than either label.
Near, mid and far infrared: what the words mean
Infrared is the part of the light spectrum just beyond visible red. It’s commonly divided into three bands by wavelength:
- Near infrared (IR-A): roughly 780 to 1,400 nanometers, closest to visible light.
- Mid infrared (IR-B): roughly 1,400 to 3,000 nanometers.
- Far infrared (IR-C): from about 3,000 nanometers out to 1 millimeter.
All three are non-ionizing; infrared does not carry the kind of energy associated with X-rays or UV damage to DNA. Shorter wavelengths reach a bit deeper into the outer layers of skin, while far infrared is absorbed closer to the surface. In a sauna, what you notice is the feel: near-infrared lamps give a more direct, sunny warmth where they point, while carbon panels give a broad, even warmth. Infrared saunas also run at lower air temperatures than traditional saunas. The listings below give maximums of 135°F to 149°F, compared with traditional saunas, where Harvard Health notes dry heat can reach 185°F.
Full spectrum vs far infrared, side by side
| Factor | Far infrared sauna | Full spectrum sauna |
|---|---|---|
| Heat sources | Carbon or ceramic panels emitting mainly far infrared | Far infrared panels plus near and mid infrared emitters |
| Feel | Broad, even warmth | Adds more direct, concentrated warmth near the lamps |
| Power draw (examples below) | Varies by model (KUNSANA example: 1,520W) | Varies by model (examples: 1,400–1,750W) |
| Parts to maintain | No lamps to replace; check panel warranty coverage | Lamps may eventually need replacing; check the warranty |
| Evidence for health differences | Limited. Studies on infrared saunas are mostly small, and few compare spectrum types directly. | |
What “low EMF” means on a listing
Any electric heater creates electric and magnetic fields when it runs. Sauna listings usually describe the magnetic part in milligauss (mG), and a “low EMF” or “ultra-low EMF” claim means the manufacturer says field levels near the heaters are low. Three things are worth knowing:
- There’s no single standard behind the term. Field strength drops quickly with distance, so a reading depends on where and how it was taken. Listings rarely say. If EMF matters to you, ask the seller for the measurement distance, method and whether a third party did it.
- The research picture. The World Health Organization says current evidence does not confirm health consequences from exposure to low-level electromagnetic fields of the kind found in everyday environments, while supporting continued research into long-term effects.
- It’s a reasonable tiebreaker, not a starting point. If two saunas match on size, build and warranty, a clearly documented low-EMF design is a sensible way to choose. It shouldn’t outweigh electrical safety or build quality.
Four infrared saunas compared on their specs
These examples cover both types. Specs come from the current listings; we compared specs and listing details rather than testing the units.
Dynamic Saunas Cordoba (full spectrum, 2-person)
A Canadian hemlock cabin with near, mid and far infrared heat, interior dimensions of 42 x 36 x 68 inches, and a maximum of 140°F with a listed comfort range of 120°F to 130°F. It plugs into a standard 15-amp, 120V outlet and draws 1,750 watts, per the listing, which also says it assembles in about an hour and carries a 5-year limited warranty for indoor use. Extras include chromotherapy lighting, a reading light and Bluetooth speakers. Our Dynamic Saunas buyer’s guide compares the rest of the line.
- Spacious Two-Person Design: Comfortably fits two adults with roomy interior dimensions of 42″ x 36″ x 68″ for a relaxing sauna exp…
- Red light: Experience soothing chromotherapy with an optional white reading light; Includes easy LED controls, Bluetooth and MP3 a…
- Quick & Easy Installation: Assembles in about one hour on any indoor surface including carpet using a standard 15-amp, 120-volt pl…
Dynamic Saunas Santorini (full spectrum, 1-2 person)
A smaller full spectrum model with interior dimensions of 35 x 33 x 68 inches, a 140°F maximum and a listed comfort range of 118°F to 132°F. It uses a standard 15-amp, 120V plug and draws 1,400 watts, per the listing, with the same 5-year limited indoor warranty.
- Spacious Two-Person Design: Comfortably fits one to two adults with roomy interior dimensions of 35″ x 33″ x 68″ for a relaxing sa…
- Red light: Experience soothing chromotherapy with an optional white reading light; Includes easy LED controls, Bluetooth and MP3 a…
- Quick & Easy Installation: Assembles in about one hour on any indoor surface including carpet using a standard 15-amp, 120-volt pl…
Dynamic Saunas Barcelona (far infrared, low EMF, 1-2 person)
A far infrared model with six low EMF carbon panels arranged for 360° heating, interior dimensions of 36 x 32 x 67 inches, and a 135°F maximum with a listed comfort range of 115°F to 130°F. Like its full spectrum siblings it uses a standard 15-amp, 120V plug and carries a 5-year limited indoor warranty. Comparing it with the Santorini shows the trade-off clearly: similar footprint, different heat source.
- Efficient 360° PureTech Heating: Built with natural Canadian hemlock wood and 6 dynamic low EMF carbon PureTech infrared panels fo…
- Spacious 1- to 2-Person Design: Comfortably fits 1-2 adults with roomy interior dimensions of 36" x 32" x 67" for a relaxing sauna…
- Red light: Experience soothing chromotherapy lighting with an optional white reading light; Includes easy LED controls, Bluetooth,…
KUNSANA Corner Far Infrared Sauna (2-3 person)
A pentagon-shaped Canadian hemlock corner unit with seven far infrared carbon panels and 1,520 watts of power, per the listing. It offers app and touchscreen control (timer up to 60 minutes and a temperature range of 65°F to 149°F) and lists an EMF range of 0-5 mG, without stating the measurement distance. The listing gives a 2-year warranty and notes the tempered glass door is covered for transit damage only.
- 【Smart App & Easy Control】Take command of your wellness journey with our smart home sauna. Pre-heat your infrared sauna for home v…
- 【Space-Saving Corner Design & Premium Hemlock Wood】Engineered for modern living spaces, this corner sauna features a unique pentag…
- 【Immersive Relaxation Ambiance & Insulated Cover】 The seven-color light therapy lamp creates the perfect atmosphere to soothe mind…
Spec summary
| Model | Type | Interior (inches) | Power (listing) | Max temp | Warranty (listing) |
|---|---|---|---|---|---|
| Dynamic Cordoba | Full spectrum | 42 x 36 x 68 | 1,750W, 120V/15A | 140°F | 5-year limited, indoor |
| Dynamic Santorini | Full spectrum | 35 x 33 x 68 | 1,400W, 120V/15A | 140°F | 5-year limited, indoor |
| Dynamic Barcelona | Far infrared, low EMF | 36 x 32 x 67 | 120V/15A plug | 135°F | 5-year limited, indoor |
| KUNSANA Corner | Far infrared, 0-5 mG claim | Not listed | 1,520W | 149°F | 2-year |
How to choose
- Start with fit and power. Measure the space, including ceiling height and door swing, and confirm the outlet and circuit the manual requires before you choose a heater type.
- Decide whether the near-infrared feel is worth it to you. Full spectrum adds a different sensation and more features. If you mainly want a warm, even sweat, a well-built far infrared cabin does that.
- Read the warranty closely. Look at what’s covered (panels, lamps, controls, glass) and for how long, and whether outdoor use voids it.
- See EMF claims as a question to ask, not a number to compare, unless the seller documents how it was measured.
- Want red light specifically? The chromotherapy and red lights on sauna listings are not the same as dedicated red light panels. Our red light panel guide covers how those are specified. For a broader look at sauna types, see our home sauna buying guide.
Safe use
- Talk to your doctor first if you have a heart condition, high or low blood pressure, are pregnant, have an implanted medical device, have reduced heat sensation (for example from neuropathy), or take medication that affects heart rate, blood pressure or sweating.
- Start short and follow the manufacturer’s session guidance. Drink water, skip alcohol, and get out if you feel dizzy, lightheaded or unwell.
- Don’t stare into near-infrared lamps, and keep skin at the distance the manual recommends from heaters.
- Electrical basics: plug 120V models directly into a properly rated wall outlet, ideally on a circuit not shared with other heavy loads, and never use an extension cord unless the manual allows it. Any new circuit, or a hardwired or 240V model, is a job for a licensed electrician.
- Keep children supervised and follow the manufacturer’s age guidance.
Frequently asked questions
Is full spectrum better than far infrared?
Not in any proven, general way. Full spectrum saunas add near and mid infrared emitters, which change how the heat feels and often add features. Research comparing the two directly is limited, so choose based on the experience you want, size, build quality and warranty.
What does low EMF mean on an infrared sauna?
It’s a manufacturer claim that magnetic field levels near the heaters are low, usually stated in milligauss. There’s no single standard for how it’s measured, so ask the seller for the measurement distance and method.
Do full spectrum saunas use more electricity?
Not necessarily. Wattage depends on the heater layout and cabin size. In the examples above, the full spectrum Cordoba lists 1,750 watts and the Santorini 1,400 watts, while the far infrared KUNSANA lists 1,520 watts. Compare the wattage on each listing for the models you’re considering.
How hot does an infrared sauna get?
Typically less hot than a traditional sauna. The models above list maximum temperatures of 135°F to 149°F, with recommended comfort ranges starting around 115°F to 120°F.
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